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content="Messier 73 (M73) is an asterism formed by four physically unrelated stars located in the southern constellation Aquarius. The asterism has an apparent magnitude of 9 and lies at an approximate distance of 2,500 light years from Earth. It has the designation NGC 6994 in the New General Catalogue. The four stars that form the… Read More »Messier 73" /> <meta property="og:url" content="https://www.messier-objects.com/messier-73/" /> <meta property="og:site_name" content="Messier Objects" /> <meta property="article:published_time" content="2015-07-24T19:24:18+00:00" /> <meta property="article:modified_time" content="2021-12-27T12:06:42+00:00" /> <meta property="og:image" content="https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73.jpg" /> <meta property="og:image:width" content="800" /> <meta property="og:image:height" content="800" /> <meta property="og:image:type" content="image/jpeg" /> <meta name="author" content="admin" /> <meta name="twitter:card" content="summary_large_image" /> <meta name="twitter:label1" content="Written by" /> <meta name="twitter:data1" content="admin" /> <meta name="twitter:label2" content="Est. reading time" /> <meta name="twitter:data2" content="3 minutes" /> <script type="application/ld+json" class="yoast-schema-graph">{"@context":"https://schema.org","@graph":[{"@type":"WebPage","@id":"https://www.messier-objects.com/messier-73/","url":"https://www.messier-objects.com/messier-73/","name":"Messier 73 - Messier Objects","isPartOf":{"@id":"https://www.messier-objects.com/#website"},"primaryImageOfPage":{"@id":"https://www.messier-objects.com/messier-73/#primaryimage"},"image":{"@id":"https://www.messier-objects.com/messier-73/#primaryimage"},"thumbnailUrl":"https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73.jpg","datePublished":"2015-07-24T19:24:18+00:00","dateModified":"2021-12-27T12:06:42+00:00","author":{"@id":"https://www.messier-objects.com/#/schema/person/ea71cf4125dc061822c77d3ec6ed782e"},"breadcrumb":{"@id":"https://www.messier-objects.com/messier-73/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https://www.messier-objects.com/messier-73/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https://www.messier-objects.com/messier-73/#primaryimage","url":"https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73.jpg","contentUrl":"https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73.jpg","width":800,"height":800,"caption":"The asterism Messier 73. 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class="wrap"><a href="https://www.messier-objects.com/messier-5/">Messier 5</a></div></li> <li id="menu-item-2875" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2875"><div class="wrap"><a href="https://www.messier-objects.com/messier-6-butterfly-cluster/">Messier 6: Butterfly Cluster</a></div></li> <li id="menu-item-2876" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2876"><div class="wrap"><a href="https://www.messier-objects.com/messier-7-ptolemys-cluster/">Messier 7: Ptolemy’s Cluster</a></div></li> <li id="menu-item-2877" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2877"><div class="wrap"><a href="https://www.messier-objects.com/messier-8-lagoon-nebula/">Messier 8: Lagoon Nebula</a></div></li> <li id="menu-item-2878" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2878"><div class="wrap"><a href="https://www.messier-objects.com/messier-9/">Messier 9</a></div></li> <li id="menu-item-2879" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2879"><div class="wrap"><a href="https://www.messier-objects.com/messier-10/">Messier 10</a></div></li> <li id="menu-item-2880" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2880"><div class="wrap"><a href="https://www.messier-objects.com/messier-11-wild-duck-cluster/">Messier 11: Wild Duck Cluster</a></div></li> <li id="menu-item-2881" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2881"><div class="wrap"><a href="https://www.messier-objects.com/messier-12-gumball-globular/">Messier 12: Gumball Globular</a></div></li> <li id="menu-item-2882" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2882"><div class="wrap"><a href="https://www.messier-objects.com/messier-13-hercules-globular-cluster/">Messier 13: Hercules Globular Cluster</a></div></li> <li id="menu-item-2883" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2883"><div class="wrap"><a href="https://www.messier-objects.com/messier-14/">Messier 14</a></div></li> <li id="menu-item-2884" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2884"><div class="wrap"><a href="https://www.messier-objects.com/messier-15-great-pegasus-cluster/">Messier 15: Great Pegasus Cluster</a></div></li> <li id="menu-item-2885" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2885"><div class="wrap"><a href="https://www.messier-objects.com/messier-16-eagle-nebula/">Messier 16: Eagle Nebula</a></div></li> <li id="menu-item-2886" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2886"><div class="wrap"><a href="https://www.messier-objects.com/messier-17-omega-nebula/">Messier 17: Omega Nebula</a></div></li> <li id="menu-item-2887" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2887"><div class="wrap"><a href="https://www.messier-objects.com/messier-18/">Messier 18</a></div></li> <li id="menu-item-2888" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2888"><div class="wrap"><a href="https://www.messier-objects.com/messier-19/">Messier 19</a></div></li> <li id="menu-item-2889" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2889"><div class="wrap"><a href="https://www.messier-objects.com/messier-20-trifid-nebula/">Messier 20: Trifid Nebula</a></div></li> <li id="menu-item-2890" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2890"><div class="wrap"><a href="https://www.messier-objects.com/messier-21/">Messier 21</a></div></li> <li id="menu-item-2891" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2891"><div class="wrap"><a href="https://www.messier-objects.com/messier-22-sagittarius-cluster/">Messier 22: Sagittarius Cluster</a></div></li> <li id="menu-item-2892" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2892"><div class="wrap"><a href="https://www.messier-objects.com/messier-23/">Messier 23</a></div></li> <li id="menu-item-2893" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2893"><div class="wrap"><a href="https://www.messier-objects.com/messier-24-sagittarius-star-cloud/">Messier 24: Sagittarius Star Cloud</a></div></li> <li id="menu-item-2894" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2894"><div class="wrap"><a href="https://www.messier-objects.com/messier-25/">Messier 25</a></div></li> <li id="menu-item-2895" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2895"><div class="wrap"><a href="https://www.messier-objects.com/messier-26/">Messier 26</a></div></li> <li id="menu-item-2896" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2896"><div class="wrap"><a href="https://www.messier-objects.com/messier-27-dumbbell-nebula/">Messier 27: Dumbbell Nebula</a></div></li> <li id="menu-item-2897" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2897"><div class="wrap"><a href="https://www.messier-objects.com/messier-28/">Messier 28</a></div></li> <li id="menu-item-2898" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2898"><div class="wrap"><a href="https://www.messier-objects.com/messier-29/">Messier 29</a></div></li> <li id="menu-item-2899" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2899"><div class="wrap"><a href="https://www.messier-objects.com/messier-30/">Messier 30</a></div></li> <li id="menu-item-2900" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2900"><div class="wrap"><a href="https://www.messier-objects.com/messier-31-andromeda-galaxy/">Messier 31: Andromeda Galaxy</a></div></li> <li id="menu-item-2901" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2901"><div class="wrap"><a href="https://www.messier-objects.com/messier-32-le-gentil/">Messier 32: Le Gentil</a></div></li> <li id="menu-item-2902" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2902"><div class="wrap"><a href="https://www.messier-objects.com/messier-33-triangulum-galaxy/">Messier 33: Triangulum Galaxy</a></div></li> <li id="menu-item-2903" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2903"><div class="wrap"><a href="https://www.messier-objects.com/messier-34/">Messier 34</a></div></li> <li id="menu-item-2904" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2904"><div class="wrap"><a href="https://www.messier-objects.com/messier-35/">Messier 35</a></div></li> <li id="menu-item-2905" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2905"><div class="wrap"><a href="https://www.messier-objects.com/messier-36-pinwheel-cluster/">Messier 36: Pinwheel Cluster</a></div></li> <li id="menu-item-2906" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2906"><div class="wrap"><a href="https://www.messier-objects.com/messier-37/">Messier 37</a></div></li> <li id="menu-item-2907" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2907"><div class="wrap"><a href="https://www.messier-objects.com/messier-38-starfish-cluster/">Messier 38: Starfish Cluster</a></div></li> <li id="menu-item-2908" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2908"><div class="wrap"><a href="https://www.messier-objects.com/messier-39/">Messier 39</a></div></li> <li id="menu-item-2909" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2909"><div class="wrap"><a href="https://www.messier-objects.com/messier-40-winnecke-4/">Messier 40: Winnecke 4</a></div></li> <li id="menu-item-2910" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2910"><div class="wrap"><a href="https://www.messier-objects.com/messier-41/">Messier 41</a></div></li> <li id="menu-item-2911" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2911"><div class="wrap"><a href="https://www.messier-objects.com/messier-42-orion-nebula/">Messier 42: Orion Nebula</a></div></li> <li id="menu-item-2912" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2912"><div class="wrap"><a href="https://www.messier-objects.com/messier-43-de-mairans-nebula/">Messier 43: De Mairan’s Nebula</a></div></li> <li id="menu-item-2913" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2913"><div class="wrap"><a href="https://www.messier-objects.com/messier-44-beehive-cluster/">Messier 44: Beehive Cluster</a></div></li> <li id="menu-item-2914" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2914"><div class="wrap"><a href="https://www.messier-objects.com/messier-45-pleiades/">Messier 45: Pleiades</a></div></li> <li id="menu-item-2915" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2915"><div class="wrap"><a href="https://www.messier-objects.com/messier-46/">Messier 46</a></div></li> <li id="menu-item-2916" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2916"><div class="wrap"><a href="https://www.messier-objects.com/messier-47/">Messier 47</a></div></li> <li id="menu-item-2917" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2917"><div class="wrap"><a href="https://www.messier-objects.com/messier-48/">Messier 48</a></div></li> <li id="menu-item-2918" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2918"><div class="wrap"><a href="https://www.messier-objects.com/messier-49/">Messier 49</a></div></li> <li id="menu-item-2919" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2919"><div class="wrap"><a href="https://www.messier-objects.com/messier-50-heart-shaped-cluster/">Messier 50: Heart-Shaped Cluster</a></div></li> <li id="menu-item-2920" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2920"><div class="wrap"><a href="https://www.messier-objects.com/messier-51-whirlpool-galaxy/">Messier 51: Whirlpool Galaxy</a></div></li> <li id="menu-item-2921" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2921"><div class="wrap"><a href="https://www.messier-objects.com/messier-52/">Messier 52</a></div></li> <li id="menu-item-2922" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2922"><div class="wrap"><a href="https://www.messier-objects.com/messier-53/">Messier 53</a></div></li> <li id="menu-item-2923" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2923"><div class="wrap"><a href="https://www.messier-objects.com/messier-54/">Messier 54</a></div></li> <li id="menu-item-2924" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2924"><div class="wrap"><a href="https://www.messier-objects.com/messier-55-summer-rose-star/">Messier 55: Summer Rose Star</a></div></li> <li id="menu-item-2925" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2925"><div class="wrap"><a href="https://www.messier-objects.com/messier-56/">Messier 56</a></div></li> <li id="menu-item-2926" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2926"><div class="wrap"><a href="https://www.messier-objects.com/messier-57-ring-nebula/">Messier 57: Ring Nebula</a></div></li> <li id="menu-item-2927" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2927"><div class="wrap"><a href="https://www.messier-objects.com/messier-58/">Messier 58</a></div></li> <li id="menu-item-2928" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2928"><div class="wrap"><a href="https://www.messier-objects.com/messier-59/">Messier 59</a></div></li> <li id="menu-item-2929" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2929"><div class="wrap"><a href="https://www.messier-objects.com/messier-60/">Messier 60</a></div></li> <li id="menu-item-2930" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2930"><div class="wrap"><a href="https://www.messier-objects.com/messier-61/">Messier 61</a></div></li> <li id="menu-item-2931" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2931"><div class="wrap"><a href="https://www.messier-objects.com/messier-62/">Messier 62</a></div></li> <li id="menu-item-2932" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2932"><div class="wrap"><a href="https://www.messier-objects.com/messier-63-sunflower-galaxy/">Messier 63: Sunflower Galaxy</a></div></li> <li id="menu-item-2933" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2933"><div class="wrap"><a href="https://www.messier-objects.com/messier-64-black-eye-galaxy/">Messier 64: Black Eye Galaxy</a></div></li> <li id="menu-item-2934" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2934"><div class="wrap"><a href="https://www.messier-objects.com/messier-65/">Messier 65</a></div></li> <li id="menu-item-2935" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2935"><div class="wrap"><a href="https://www.messier-objects.com/messier-66/">Messier 66</a></div></li> <li id="menu-item-2936" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2936"><div class="wrap"><a href="https://www.messier-objects.com/messier-67-king-cobra-cluster/">Messier 67: King Cobra Cluster</a></div></li> <li id="menu-item-2937" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2937"><div class="wrap"><a href="https://www.messier-objects.com/messier-68/">Messier 68</a></div></li> <li id="menu-item-2938" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2938"><div class="wrap"><a href="https://www.messier-objects.com/messier-69/">Messier 69</a></div></li> <li id="menu-item-2939" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2939"><div class="wrap"><a href="https://www.messier-objects.com/messier-70/">Messier 70</a></div></li> <li id="menu-item-2940" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2940"><div class="wrap"><a href="https://www.messier-objects.com/messier-71/">Messier 71</a></div></li> <li id="menu-item-2941" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2941"><div class="wrap"><a href="https://www.messier-objects.com/messier-72/">Messier 72</a></div></li> <li id="menu-item-2942" class="menu-item menu-item-type-post_type menu-item-object-post current-menu-item menu-item-2942 nv-active"><div class="wrap"><a href="https://www.messier-objects.com/messier-73/" aria-current="page">Messier 73</a></div></li> <li id="menu-item-2943" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2943"><div class="wrap"><a href="https://www.messier-objects.com/messier-74-phantom-galaxy/">Messier 74: Phantom Galaxy</a></div></li> <li id="menu-item-2944" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2944"><div class="wrap"><a href="https://www.messier-objects.com/messier-75/">Messier 75</a></div></li> <li id="menu-item-2945" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2945"><div class="wrap"><a href="https://www.messier-objects.com/messier-76-little-dumbbell-nebula/">Messier 76: Little Dumbbell Nebula</a></div></li> <li id="menu-item-2946" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2946"><div class="wrap"><a href="https://www.messier-objects.com/messier-77-cetus-a/">Messier 77: Cetus A</a></div></li> <li id="menu-item-2947" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2947"><div class="wrap"><a href="https://www.messier-objects.com/messier-78/">Messier 78</a></div></li> <li id="menu-item-2948" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2948"><div class="wrap"><a href="https://www.messier-objects.com/messier-79/">Messier 79</a></div></li> <li id="menu-item-2949" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2949"><div class="wrap"><a href="https://www.messier-objects.com/messier-80/">Messier 80</a></div></li> <li id="menu-item-2950" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2950"><div class="wrap"><a href="https://www.messier-objects.com/messier-81-bodes-galaxy/">Messier 81: Bode’s Galaxy</a></div></li> <li id="menu-item-2951" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2951"><div class="wrap"><a href="https://www.messier-objects.com/messier-82-cigar-galaxy/">Messier 82: Cigar Galaxy</a></div></li> <li id="menu-item-2952" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2952"><div class="wrap"><a href="https://www.messier-objects.com/messier-83-southern-pinwheel-galaxy/">Messier 83: Southern Pinwheel Galaxy</a></div></li> <li id="menu-item-2953" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2953"><div class="wrap"><a href="https://www.messier-objects.com/messier-84/">Messier 84</a></div></li> <li id="menu-item-2954" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2954"><div class="wrap"><a href="https://www.messier-objects.com/messier-85/">Messier 85</a></div></li> <li id="menu-item-2955" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2955"><div class="wrap"><a href="https://www.messier-objects.com/messier-86/">Messier 86</a></div></li> <li id="menu-item-2956" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2956"><div class="wrap"><a href="https://www.messier-objects.com/messier-87-virgo-a/">Messier 87: Virgo A</a></div></li> <li id="menu-item-2957" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2957"><div class="wrap"><a href="https://www.messier-objects.com/messier-88/">Messier 88</a></div></li> <li id="menu-item-2958" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2958"><div class="wrap"><a href="https://www.messier-objects.com/messier-89/">Messier 89</a></div></li> <li id="menu-item-2959" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2959"><div class="wrap"><a href="https://www.messier-objects.com/messier-90/">Messier 90</a></div></li> <li id="menu-item-2960" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2960"><div class="wrap"><a href="https://www.messier-objects.com/messier-91/">Messier 91</a></div></li> <li id="menu-item-2961" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2961"><div class="wrap"><a href="https://www.messier-objects.com/messier-92/">Messier 92</a></div></li> <li id="menu-item-2962" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2962"><div class="wrap"><a href="https://www.messier-objects.com/messier-93/">Messier 93</a></div></li> <li id="menu-item-2963" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2963"><div class="wrap"><a href="https://www.messier-objects.com/messier-94-cats-eye-galaxy/">Messier 94: Cat’s Eye Galaxy</a></div></li> <li id="menu-item-2964" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2964"><div class="wrap"><a href="https://www.messier-objects.com/messier-95/">Messier 95</a></div></li> <li id="menu-item-2965" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2965"><div class="wrap"><a href="https://www.messier-objects.com/messier-96/">Messier 96</a></div></li> <li id="menu-item-2966" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2966"><div class="wrap"><a href="https://www.messier-objects.com/messier-97-owl-nebula/">Messier 97: Owl Nebula</a></div></li> <li id="menu-item-2967" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2967"><div class="wrap"><a href="https://www.messier-objects.com/messier-98/">Messier 98</a></div></li> <li id="menu-item-2968" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2968"><div class="wrap"><a href="https://www.messier-objects.com/messier-99-coma-pinwheel/">Messier 99: Coma Pinwheel</a></div></li> <li id="menu-item-2969" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2969"><div class="wrap"><a href="https://www.messier-objects.com/messier-100/">Messier 100</a></div></li> <li id="menu-item-2970" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2970"><div class="wrap"><a href="https://www.messier-objects.com/messier-101-pinwheel-galaxy/">Messier 101: Pinwheel Galaxy</a></div></li> <li id="menu-item-2971" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2971"><div class="wrap"><a href="https://www.messier-objects.com/messier-102-spindle-galaxy/">Messier 102: Spindle Galaxy</a></div></li> <li id="menu-item-2972" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2972"><div class="wrap"><a href="https://www.messier-objects.com/messier-103/">Messier 103</a></div></li> <li id="menu-item-2973" class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2973"><div class="wrap"><a href="https://www.messier-objects.com/messier-104-sombrero-galaxy/">Messier 104: Sombrero Galaxy</a></div></li> <li 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24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z"/></svg></span></div></div> <ul class="sub-menu"> <li id="menu-item-3637" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-3637"><div class="wrap"><a href="https://www.messier-objects.com/messier-objects-by-constellation/messier-objects-in-canis-major/">Messier Objects in Canis Major</a></div></li> <li id="menu-item-3636" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-3636"><div class="wrap"><a href="https://www.messier-objects.com/messier-objects-by-constellation/messier-objects-in-cassiopeia/">Messier Objects in Cassiopeia</a></div></li> <li id="menu-item-3634" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-3634"><div class="wrap"><a 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style="margin-left:5px;" aria-label="Toggle Messier Object List"><span class="caret"><svg fill="currentColor" aria-label="Dropdown" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z"/></svg></span></button></div> <ul class="sub-menu"> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2870"><div class="wrap"><a href="https://www.messier-objects.com/messier-1-crab-nebula/">Messier 1: Crab Nebula</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2871"><div class="wrap"><a href="https://www.messier-objects.com/messier-2/">Messier 2</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post 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menu-item-2882"><div class="wrap"><a href="https://www.messier-objects.com/messier-13-hercules-globular-cluster/">Messier 13: Hercules Globular Cluster</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2883"><div class="wrap"><a href="https://www.messier-objects.com/messier-14/">Messier 14</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2884"><div class="wrap"><a href="https://www.messier-objects.com/messier-15-great-pegasus-cluster/">Messier 15: Great Pegasus Cluster</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2885"><div class="wrap"><a href="https://www.messier-objects.com/messier-16-eagle-nebula/">Messier 16: Eagle Nebula</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2886"><div class="wrap"><a href="https://www.messier-objects.com/messier-17-omega-nebula/">Messier 17: Omega Nebula</a></div></li> <li 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menu-item-type-post_type menu-item-object-post menu-item-2892"><div class="wrap"><a href="https://www.messier-objects.com/messier-23/">Messier 23</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2893"><div class="wrap"><a href="https://www.messier-objects.com/messier-24-sagittarius-star-cloud/">Messier 24: Sagittarius Star Cloud</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2894"><div class="wrap"><a href="https://www.messier-objects.com/messier-25/">Messier 25</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2895"><div class="wrap"><a href="https://www.messier-objects.com/messier-26/">Messier 26</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2896"><div class="wrap"><a href="https://www.messier-objects.com/messier-27-dumbbell-nebula/">Messier 27: Dumbbell Nebula</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2897"><div class="wrap"><a href="https://www.messier-objects.com/messier-28/">Messier 28</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2898"><div class="wrap"><a href="https://www.messier-objects.com/messier-29/">Messier 29</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2899"><div class="wrap"><a href="https://www.messier-objects.com/messier-30/">Messier 30</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2900"><div class="wrap"><a href="https://www.messier-objects.com/messier-31-andromeda-galaxy/">Messier 31: Andromeda Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2901"><div class="wrap"><a href="https://www.messier-objects.com/messier-32-le-gentil/">Messier 32: Le Gentil</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2902"><div class="wrap"><a href="https://www.messier-objects.com/messier-33-triangulum-galaxy/">Messier 33: Triangulum Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2903"><div class="wrap"><a href="https://www.messier-objects.com/messier-34/">Messier 34</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2904"><div class="wrap"><a href="https://www.messier-objects.com/messier-35/">Messier 35</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2905"><div class="wrap"><a href="https://www.messier-objects.com/messier-36-pinwheel-cluster/">Messier 36: Pinwheel Cluster</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2906"><div class="wrap"><a href="https://www.messier-objects.com/messier-37/">Messier 37</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2907"><div class="wrap"><a href="https://www.messier-objects.com/messier-38-starfish-cluster/">Messier 38: Starfish Cluster</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2908"><div class="wrap"><a href="https://www.messier-objects.com/messier-39/">Messier 39</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2909"><div class="wrap"><a href="https://www.messier-objects.com/messier-40-winnecke-4/">Messier 40: Winnecke 4</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2910"><div class="wrap"><a href="https://www.messier-objects.com/messier-41/">Messier 41</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2911"><div class="wrap"><a href="https://www.messier-objects.com/messier-42-orion-nebula/">Messier 42: Orion Nebula</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2912"><div class="wrap"><a href="https://www.messier-objects.com/messier-43-de-mairans-nebula/">Messier 43: De Mairan’s Nebula</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2913"><div class="wrap"><a href="https://www.messier-objects.com/messier-44-beehive-cluster/">Messier 44: Beehive Cluster</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2914"><div class="wrap"><a href="https://www.messier-objects.com/messier-45-pleiades/">Messier 45: Pleiades</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2915"><div class="wrap"><a href="https://www.messier-objects.com/messier-46/">Messier 46</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2916"><div class="wrap"><a href="https://www.messier-objects.com/messier-47/">Messier 47</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2917"><div class="wrap"><a href="https://www.messier-objects.com/messier-48/">Messier 48</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2918"><div class="wrap"><a href="https://www.messier-objects.com/messier-49/">Messier 49</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2919"><div class="wrap"><a href="https://www.messier-objects.com/messier-50-heart-shaped-cluster/">Messier 50: Heart-Shaped Cluster</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2920"><div class="wrap"><a href="https://www.messier-objects.com/messier-51-whirlpool-galaxy/">Messier 51: Whirlpool Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2921"><div class="wrap"><a href="https://www.messier-objects.com/messier-52/">Messier 52</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2922"><div class="wrap"><a href="https://www.messier-objects.com/messier-53/">Messier 53</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2923"><div class="wrap"><a href="https://www.messier-objects.com/messier-54/">Messier 54</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2924"><div class="wrap"><a href="https://www.messier-objects.com/messier-55-summer-rose-star/">Messier 55: Summer Rose Star</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2925"><div class="wrap"><a href="https://www.messier-objects.com/messier-56/">Messier 56</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2926"><div class="wrap"><a href="https://www.messier-objects.com/messier-57-ring-nebula/">Messier 57: Ring Nebula</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2927"><div class="wrap"><a href="https://www.messier-objects.com/messier-58/">Messier 58</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2928"><div class="wrap"><a href="https://www.messier-objects.com/messier-59/">Messier 59</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2929"><div class="wrap"><a href="https://www.messier-objects.com/messier-60/">Messier 60</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2930"><div class="wrap"><a href="https://www.messier-objects.com/messier-61/">Messier 61</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2931"><div class="wrap"><a href="https://www.messier-objects.com/messier-62/">Messier 62</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2932"><div class="wrap"><a href="https://www.messier-objects.com/messier-63-sunflower-galaxy/">Messier 63: Sunflower Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2933"><div class="wrap"><a href="https://www.messier-objects.com/messier-64-black-eye-galaxy/">Messier 64: Black Eye Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2934"><div class="wrap"><a href="https://www.messier-objects.com/messier-65/">Messier 65</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2935"><div class="wrap"><a href="https://www.messier-objects.com/messier-66/">Messier 66</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2936"><div class="wrap"><a href="https://www.messier-objects.com/messier-67-king-cobra-cluster/">Messier 67: King Cobra Cluster</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2937"><div class="wrap"><a href="https://www.messier-objects.com/messier-68/">Messier 68</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2938"><div class="wrap"><a href="https://www.messier-objects.com/messier-69/">Messier 69</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2939"><div class="wrap"><a href="https://www.messier-objects.com/messier-70/">Messier 70</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2940"><div class="wrap"><a href="https://www.messier-objects.com/messier-71/">Messier 71</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2941"><div class="wrap"><a href="https://www.messier-objects.com/messier-72/">Messier 72</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post current-menu-item menu-item-2942 nv-active"><div class="wrap"><a href="https://www.messier-objects.com/messier-73/" aria-current="page">Messier 73</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2943"><div class="wrap"><a href="https://www.messier-objects.com/messier-74-phantom-galaxy/">Messier 74: Phantom Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2944"><div class="wrap"><a href="https://www.messier-objects.com/messier-75/">Messier 75</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2945"><div class="wrap"><a href="https://www.messier-objects.com/messier-76-little-dumbbell-nebula/">Messier 76: Little Dumbbell Nebula</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2946"><div class="wrap"><a href="https://www.messier-objects.com/messier-77-cetus-a/">Messier 77: Cetus A</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2947"><div class="wrap"><a href="https://www.messier-objects.com/messier-78/">Messier 78</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2948"><div class="wrap"><a href="https://www.messier-objects.com/messier-79/">Messier 79</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2949"><div class="wrap"><a href="https://www.messier-objects.com/messier-80/">Messier 80</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2950"><div class="wrap"><a href="https://www.messier-objects.com/messier-81-bodes-galaxy/">Messier 81: Bode’s Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2951"><div class="wrap"><a href="https://www.messier-objects.com/messier-82-cigar-galaxy/">Messier 82: Cigar Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2952"><div class="wrap"><a href="https://www.messier-objects.com/messier-83-southern-pinwheel-galaxy/">Messier 83: Southern Pinwheel Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2953"><div class="wrap"><a href="https://www.messier-objects.com/messier-84/">Messier 84</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2954"><div class="wrap"><a href="https://www.messier-objects.com/messier-85/">Messier 85</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2955"><div class="wrap"><a href="https://www.messier-objects.com/messier-86/">Messier 86</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2956"><div class="wrap"><a href="https://www.messier-objects.com/messier-87-virgo-a/">Messier 87: Virgo A</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2957"><div class="wrap"><a href="https://www.messier-objects.com/messier-88/">Messier 88</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2958"><div class="wrap"><a href="https://www.messier-objects.com/messier-89/">Messier 89</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2959"><div class="wrap"><a href="https://www.messier-objects.com/messier-90/">Messier 90</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2960"><div class="wrap"><a href="https://www.messier-objects.com/messier-91/">Messier 91</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2961"><div class="wrap"><a href="https://www.messier-objects.com/messier-92/">Messier 92</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2962"><div class="wrap"><a href="https://www.messier-objects.com/messier-93/">Messier 93</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2963"><div class="wrap"><a href="https://www.messier-objects.com/messier-94-cats-eye-galaxy/">Messier 94: Cat’s Eye Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2964"><div class="wrap"><a href="https://www.messier-objects.com/messier-95/">Messier 95</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2965"><div class="wrap"><a href="https://www.messier-objects.com/messier-96/">Messier 96</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2966"><div class="wrap"><a href="https://www.messier-objects.com/messier-97-owl-nebula/">Messier 97: Owl Nebula</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2967"><div class="wrap"><a href="https://www.messier-objects.com/messier-98/">Messier 98</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2968"><div class="wrap"><a href="https://www.messier-objects.com/messier-99-coma-pinwheel/">Messier 99: Coma Pinwheel</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2969"><div class="wrap"><a href="https://www.messier-objects.com/messier-100/">Messier 100</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2970"><div class="wrap"><a href="https://www.messier-objects.com/messier-101-pinwheel-galaxy/">Messier 101: Pinwheel Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2971"><div class="wrap"><a href="https://www.messier-objects.com/messier-102-spindle-galaxy/">Messier 102: Spindle Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2972"><div class="wrap"><a href="https://www.messier-objects.com/messier-103/">Messier 103</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2973"><div class="wrap"><a href="https://www.messier-objects.com/messier-104-sombrero-galaxy/">Messier 104: Sombrero Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2974"><div class="wrap"><a href="https://www.messier-objects.com/messier-105/">Messier 105</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2975"><div class="wrap"><a href="https://www.messier-objects.com/messier-106/">Messier 106</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2976"><div class="wrap"><a href="https://www.messier-objects.com/messier-107/">Messier 107</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2977"><div class="wrap"><a href="https://www.messier-objects.com/messier-108-surfboard-galaxy/">Messier 108: Surfboard Galaxy</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2978"><div class="wrap"><a href="https://www.messier-objects.com/messier-109/">Messier 109</a></div></li> <li class="menu-item menu-item-type-post_type menu-item-object-post menu-item-2979"><div class="wrap"><a href="https://www.messier-objects.com/messier-110-edward-young-star/">Messier 110: Edward Young Star</a></div></li> </ul> </li> <li class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-3054"><div class="wrap"><a href="https://www.messier-objects.com/messier-objects-by-constellation/"><span class="menu-item-title-wrap dd-title">Messier Objects by Constellation</span></a><button tabindex="0" type="button" class="caret-wrap navbar-toggle 114" style="margin-left:5px;" aria-label="Toggle Messier Objects by Constellation"><span class="caret"><svg fill="currentColor" aria-label="Dropdown" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M207.029 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class="entry-header" ><div class="nv-title-meta-wrap"><small class="nv--yoast-breadcrumb neve-breadcrumbs-wrapper"><span><span><a href="https://www.messier-objects.com/">Home</a></span> » <span class="breadcrumb_last" aria-current="page">Messier 73</span></span></small><h1 class="title entry-title">Messier 73</h1><ul class="nv-meta-list"><li class="meta author vcard no-mobile"><span class="author-name fn">by <a href="https://www.messier-objects.com/author/admin/" title="Posts by admin" rel="author">admin</a></span></li><li class="meta date posted-on"><time class="entry-date published" datetime="2015-07-24T19:24:18+00:00" content="2015-07-24">July 24, 2015</time><time class="updated" datetime="2021-12-27T12:06:42+00:00">December 27, 2021</time></li></ul></div></div><div class="nv-content-wrap entry-content"><p>Messier 73 (M73) is an <a href="https://www.constellation-guide.com/asterisms/">asterism</a> formed by four physically unrelated stars located in the southern constellation <a href="https://www.constellation-guide.com/constellation-list/aquarius-constellation/">Aquarius</a>. The asterism has an apparent magnitude of 9 and lies at an approximate distance of 2,500 light years from Earth. It has the designation NGC 6994 in the New General Catalogue.<br /> <span id="more-1261"></span><br /> The four stars that form the Y-shaped asterism only appear close to each other in the sky because they are located along the same line of sight when seen from Earth.</p> <p>The asterism can be found in the southern part of <a href="https://www.constellation-guide.com/constellation-list/aquarius-constellation/">Aquarius constellation</a>, near the border with <a href="https://www.constellation-guide.com/constellation-list/capricornus-constellation/">Capricornus</a>. It is positioned about 1.5 degrees east of the globular cluster <a href="https://www.messier-objects.com/messier-72/">Messier 72</a>, and just below the imaginary line connecting the bright stars <a href="https://www.star-facts.com/fomalhaut/">Fomalhaut</a> in <a href="https://www.constellation-guide.com/constellation-list/piscis-austrinus-constellation/">Piscis Austrinus</a> and <a href="https://www.star-facts.com/altair/">Altair</a> in <a href="https://www.constellation-guide.com/constellation-list/aquila-constellation/">Aquila constellation</a>.</p> <p>M73 can also be found 2 degrees south and 1.5 degrees east of the magnitude 4.5 star Albulaan, Nu Aquarii. As both <a href="https://www.constellation-guide.com/constellation-list/aquarius-constellation/">Aquarius</a> and <a href="https://www.constellation-guide.com/constellation-list/capricornus-constellation/">Capricornus</a> are relatively faint <a href="https://www.constellation-guide.com/constellations/">constellations</a>, <a href="https://www.messier-objects.com/messier-72/">M72</a> and M73 are among the more challenging Messier objects to find. The stars of M73 are quite faint and not easy to observe in 10×50 binoculars. Larger binoculars will reveal a dim point of light, while a 4-inch telescope will show the Y shape clearly. The best time of year to observe M73 is during the summer.</p> <figure id="attachment_1279" aria-describedby="caption-attachment-1279" style="width: 600px" class="wp-caption aligncenter"><a href="https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73.jpg"><img fetchpriority="high" decoding="async" class="wp-image-1279" src="https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73.jpg" alt="m73,m73 asterism" width="600" height="600" srcset="https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73.jpg 800w, https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73-150x150.jpg 150w, https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73-300x300.jpg 300w, https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73-50x50.jpg 50w" sizes="(max-width: 600px) 100vw, 600px" /></a><figcaption id="caption-attachment-1279" class="wp-caption-text">The asterism Messier 73. Image: Wikisky</figcaption></figure> <p>The stars that form M73 have apparent magnitudes of 10.48, 11.32, 11.90 and 11.94, and occupy an area of 2.8 arc minutes of apparent sky.</p> <p>Messier 73 was previously thought to be a poorly populated open star cluster and its stars were believed to be bound by gravitational attraction. Today, it is known to be one of the three Messier objects that are not deep sky objects at all, along with the double star <a href="https://www.messier-objects.com/messier-40-winnecke-4/">Messier 40</a> and the Milky Way star cloud <a href="https://www.messier-objects.com/messier-24-sagittarius-star-cloud/">Messier 24</a> (Sagittarius Star Cloud).</p> <p>Charles Messier discovered M73 on October 4, 1780 and added it to his catalogue as object number 73. He described it as a cluster with some nebulosity, noting:</p> <blockquote><p>Cluster of three or four small stars, which resembles a nebula at first sight, containing a little nebulosity: this cluster is situated on the same parallel as the preceding nebula [<a href="https://www.messier-objects.com/messier-72/">Messier 72</a>]: its position was determined from the same star Nu Aquarii.</p></blockquote> <figure id="attachment_1280" aria-describedby="caption-attachment-1280" style="width: 600px" class="wp-caption aligncenter"><a href="https://www.messier-objects.com/wp-content/uploads/2015/07/M73-and-Nu-Aquarii.jpg"><img decoding="async" class="wp-image-1280" src="https://www.messier-objects.com/wp-content/uploads/2015/07/M73-and-Nu-Aquarii.jpg" alt="messier 73,nu aquarii" width="600" height="600" srcset="https://www.messier-objects.com/wp-content/uploads/2015/07/M73-and-Nu-Aquarii.jpg 800w, https://www.messier-objects.com/wp-content/uploads/2015/07/M73-and-Nu-Aquarii-150x150.jpg 150w, https://www.messier-objects.com/wp-content/uploads/2015/07/M73-and-Nu-Aquarii-300x300.jpg 300w, https://www.messier-objects.com/wp-content/uploads/2015/07/M73-and-Nu-Aquarii-50x50.jpg 50w" sizes="(max-width: 600px) 100vw, 600px" /></a><figcaption id="caption-attachment-1280" class="wp-caption-text">M73 and Nu Aquarii. Image: Wikisky</figcaption></figure> <p>Even though there has been a lot of debate about the nature of M73 since Messier’s discovery, recent studies indicate that M73 is not an open cluster, but merely an asterism, and that the four stars lie at different distances from Earth and are moving in different directions. However, as recently as 2000, a photometry study suggested that M73 was a cluster remnant, about 9 arc minutes wide, with an estimated age of 2 to 3 billion years. It was only two years later that a high-resolution spectroscopic study of the spectra of the six brightest stars near the centre of M73 revealed that the four stars were not in fact physically related.</p> <p>Astronomers who observed M73 in the decades following Messier’s discovery, including William and John Herschel, did not detect any nebulosity around the stars. William Herschel observed the object on September 28, 1783 and noted that it “consists of a few stars arranged in triangular form,” adding that there was “no nebulosity among them.”</p> <p>John Herschel questioned Messier’s designation of M73 as a cluster, but added the object to his General Catalogue nonetheless as GC 4617. He noted, “Cluster ??; extremely poor; very little compressed; no nebulosity.”</p> <figure id="attachment_1281" aria-describedby="caption-attachment-1281" style="width: 600px" class="wp-caption aligncenter"><a href="https://www.messier-objects.com/wp-content/uploads/2015/07/M73-location.jpg"><img decoding="async" class="wp-image-1281" src="https://www.messier-objects.com/wp-content/uploads/2015/07/M73-location.jpg" alt="messier 73 position" width="600" height="600" srcset="https://www.messier-objects.com/wp-content/uploads/2015/07/M73-location.jpg 800w, https://www.messier-objects.com/wp-content/uploads/2015/07/M73-location-150x150.jpg 150w, https://www.messier-objects.com/wp-content/uploads/2015/07/M73-location-300x300.jpg 300w, https://www.messier-objects.com/wp-content/uploads/2015/07/M73-location-50x50.jpg 50w" sizes="(max-width: 600px) 100vw, 600px" /></a><figcaption id="caption-attachment-1281" class="wp-caption-text">M73 location. Image: Wikisky</figcaption></figure> <h3 style="text-align: center;">FACTS</h3> <table> <tbody> <tr> <td width="619"><strong>Object: Asterism </strong></td> </tr> <tr> <td width="619"><strong>Designations: Messier 73, M73, NGC 6994, Collinder 426, C 2056-128, OCl 89</strong></td> </tr> <tr> <td width="619"><strong>Constellation: <a href="https://www.constellation-guide.com/constellation-list/aquarius-constellation/">Aquarius</a> </strong></td> </tr> <tr> <td width="619"><strong>Right ascension: 20h 58m 54s </strong></td> </tr> <tr> <td width="619"><strong>Declination: -12°38′ </strong></td> </tr> <tr> <td width="619"><strong>Distance: 2,500 light years (770 parsecs) </strong></td> </tr> <tr> <td width="619"><strong>Number of stars: 4 </strong></td> </tr> <tr> <td width="619"><strong>Apparent magnitude: +9.0 </strong></td> </tr> <tr> <td width="619"><strong>Apparent dimensions: 2′.8 </strong></td> </tr> </tbody> </table> <h3 style="text-align: center;">LOCATION</h3> <figure id="attachment_1278" aria-describedby="caption-attachment-1278" style="width: 600px" class="wp-caption aligncenter"><a href="https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73-location.png"><img loading="lazy" decoding="async" class="wp-image-1278" src="https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73-location.png" alt="m73 location,where is m73,find messier 73" width="600" height="527" srcset="https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73-location.png 874w, https://www.messier-objects.com/wp-content/uploads/2015/07/Messier-73-location-300x264.png 300w" sizes="auto, (max-width: 600px) 100vw, 600px" /></a><figcaption id="caption-attachment-1278" class="wp-caption-text">Messier 73 location. Image: IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg)</figcaption></figure> </div><div class="nv-tags-list"><span>Tags:</span><a href=https://www.messier-objects.com/tag/albulaan/ title="Albulaan" class=albulaan rel="tag">Albulaan</a><a href=https://www.messier-objects.com/tag/altair/ title="Altair" class=altair rel="tag">Altair</a><a href=https://www.messier-objects.com/tag/aquarius-constellation/ title="Aquarius Constellation" class=aquarius-constellation rel="tag">Aquarius Constellation</a><a href=https://www.messier-objects.com/tag/fomalhaut/ title="Fomalhaut" class=fomalhaut rel="tag">Fomalhaut</a><a href=https://www.messier-objects.com/tag/gc-4617/ title="GC 4617" class=gc-4617 rel="tag">GC 4617</a><a href=https://www.messier-objects.com/tag/john-herschel/ title="John Herschel" class=john-herschel rel="tag">John Herschel</a><a href=https://www.messier-objects.com/tag/m73/ title="M73" class=m73 rel="tag">M73</a><a href=https://www.messier-objects.com/tag/messier-24/ title="Messier 24" class=messier-24 rel="tag">Messier 24</a><a href=https://www.messier-objects.com/tag/messier-40/ title="Messier 40" class=messier-40 rel="tag">Messier 40</a><a href=https://www.messier-objects.com/tag/messier-72/ title="Messier 72" class=messier-72 rel="tag">Messier 72</a><a href=https://www.messier-objects.com/tag/messier-73/ title="Messier 73" class=messier-73 rel="tag">Messier 73</a><a href=https://www.messier-objects.com/tag/ngc-6994/ title="NGC 6994" class=ngc-6994 rel="tag">NGC 6994</a><a href=https://www.messier-objects.com/tag/nu-aquarii/ title="Nu Aquarii" class=nu-aquarii rel="tag">Nu Aquarii</a><a href=https://www.messier-objects.com/tag/sagittarius-star-cloud/ title="Sagittarius Star Cloud" class=sagittarius-star-cloud rel="tag">Sagittarius Star Cloud</a><a href=https://www.messier-objects.com/tag/william-herschel/ title="William Herschel" class=william-herschel rel="tag">William Herschel</a> </div> <div id="comments" class="comments-area"> </div> </article> <div class="nv-sidebar-wrap col-sm-12 nv-right blog-sidebar" > <aside id="secondary" role="complementary"> <div id="text-3" class="widget widget_text"> <div class="textwidget"> <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-0663561204264333" data-ad-slot="7505940549" data-ad-format="auto"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> </div><div id="text-2" class="widget widget_text"><p class="widget-title">Messier Objects</p> <div class="textwidget"><p><a href="https://www.messier-objects.com/messier-1-crab-nebula/">Messier 1: Crab Nebula</a><br /> <a href="https://www.messier-objects.com/messier-2/">Messier 2</a><br /> <a href="https://www.messier-objects.com/messier-3/">Messier 3</a><br /> <a href="https://www.messier-objects.com/messier-4/">Messier 4</a><br /> <a href="https://www.messier-objects.com/messier-5/">Messier 5</a><br /> <a href="https://www.messier-objects.com/messier-6-butterfly-cluster/">Messier 6: Butterfly Cluster</a><br /> <a href="https://www.messier-objects.com/messier-7-ptolemys-cluster/">Messier 7: Ptolemy Cluster</a><br /> <a href="https://www.messier-objects.com/messier-8-lagoon-nebula/">Messier 8: Lagoon Nebula</a><br /> <a href="https://www.messier-objects.com/messier-9/">Messier 9</a><br /> <a href="https://www.messier-objects.com/messier-10/">Messier 10</a><br /> <a href="https://www.messier-objects.com/messier-11-wild-duck-cluster/">Messier 11: Wild Duck Cluster</a><br /> <a href="https://www.messier-objects.com/messier-12-gumball-globular/">Messier 12: Gumball Globular</a><br /> <a href="https://www.messier-objects.com/messier-13-hercules-globular-cluster/">Messier 13: Hercules Globular Cluster</a><br /> <a href="https://www.messier-objects.com/messier-14/">Messier 14</a><br /> <a href="https://www.messier-objects.com/messier-15-great-pegasus-cluster/">Messier 15: Great Pegasus Cluster</a><br /> <a href="https://www.messier-objects.com/messier-16-eagle-nebula/">Messier 16: Eagle Nebula</a><br /> * <a href="https://www.messier-objects.com/pillars-of-creation/">Pillars of Creation</a><br /> <a href="https://www.messier-objects.com/messier-17-omega-nebula/">Messier 17: Omega Nebula</a><br /> <a href="https://www.messier-objects.com/messier-18/">Messier 18</a><br /> <a href="https://www.messier-objects.com/messier-19/">Messier 19</a><br /> <a href="https://www.messier-objects.com/messier-20-trifid-nebula/">Messier 20: Trifid Nebula</a><br /> <a href="https://www.messier-objects.com/messier-21/">Messier 21</a><br /> <a href="https://www.messier-objects.com/messier-22-sagittarius-cluster/">Messier 22: Sagittarius Cluster</a><br /> <a href="https://www.messier-objects.com/messier-23/">Messier 23</a><br /> <a href="https://www.messier-objects.com/messier-24-sagittarius-star-cloud/">Messier 24: Sagittarius Star Cloud</a><br /> <a href="https://www.messier-objects.com/messier-25/">Messier 25</a><br /> <a href="https://www.messier-objects.com/messier-26/">Messier 26</a><br /> <a href="https://www.messier-objects.com/messier-27-dumbbell-nebula/">Messier 27: Dumbbell Nebula</a><br /> <a href="https://www.messier-objects.com/messier-28/">Messier 28</a><br /> <a href="https://www.messier-objects.com/messier-29/">Messier 29</a><br /> <a href="https://www.messier-objects.com/messier-30/">Messier 30</a><br /> <a href="https://www.messier-objects.com/messier-31-andromeda-galaxy/">Messier 31: Andromeda Galaxy</a><br /> * <a href="https://www.messier-objects.com/mayall-ii/">Mayall II</a><br /> <a href="https://www.messier-objects.com/messier-32-le-gentil/">Messier 32: Le Gentil</a><br /> <a href="https://www.messier-objects.com/messier-33-triangulum-galaxy/">Messier 33: Triangulum Galaxy</a><br /> <a href="https://www.messier-objects.com/messier-34/">Messier 34</a><br /> <a href="https://www.messier-objects.com/messier-35/">Messier 35</a><br /> <a href="https://www.messier-objects.com/messier-36-pinwheel-cluster/">Messier 36: Pinwheel Cluster</a><br /> <a href="https://www.messier-objects.com/messier-37/">Messier 37</a><br /> <a href="https://www.messier-objects.com/messier-38-starfish-cluster/">Messier 38: Starfish Cluster</a><br /> <a href="https://www.messier-objects.com/messier-39/">Messier 39</a><br /> <a href="https://www.messier-objects.com/messier-40-winnecke-4/">Messier 40: Winnecke 4</a><br /> <a href="https://www.messier-objects.com/messier-41/">Messier 41</a><br /> <a href="https://www.messier-objects.com/messier-42-orion-nebula/">Messier 42: Orion Nebula</a><br /> * <a href="https://www.messier-objects.com/trapezium-cluster/">Trapezium Cluster</a><br /> <a href="https://www.messier-objects.com/messier-43-de-mairans-nebula/">Messier 43: De Mairan's Nebula</a><br /> <a href="https://www.messier-objects.com/messier-44-beehive-cluster/">Messier 44: Beehive Cluster</a><br /> <a href="https://www.messier-objects.com/messier-45-pleiades/">Messier 45: Pleiades</a><br /> * <a href="https://www.messier-objects.com/maia-nebula/">Maia Nebula</a><br /> * <a href="https://www.messier-objects.com/merope-nebula/">Merope Nebula</a><br /> <a href="https://www.messier-objects.com/messier-46/">Messier 46</a><br /> <a href="https://www.messier-objects.com/messier-47/">Messier 47</a><br /> <a href="https://www.messier-objects.com/messier-48/">Messier 48</a><br /> <a href="https://www.messier-objects.com/messier-49/">Messier 49</a><br /> <a href="https://www.messier-objects.com/messier-50-heart-shaped-cluster/">Messier 50: Heart-Shaped Cluster</a><br /> <a href="https://www.messier-objects.com/messier-51-whirlpool-galaxy/">Messier 51: Whirlpool Galaxy</a><br /> <a href="https://www.messier-objects.com/messier-52/">Messier 52</a><br /> <a href="https://www.messier-objects.com/messier-53/">Messier 53</a><br /> <a href="https://www.messier-objects.com/messier-54/">Messier 54</a><br /> <a href="https://www.messier-objects.com/messier-55-summer-rose-star/">Messier 55: Summer Rose Star</a><br /> <a href="https://www.messier-objects.com/messier-56/">Messier 56</a><br /> <a href="https://www.messier-objects.com/messier-57-ring-nebula/">Messier 57: Ring Nebula</a><br /> <a href="https://www.messier-objects.com/messier-58/">Messier 58</a><br /> <a href="https://www.messier-objects.com/messier-59/">Messier 59</a><br /> <a href="https://www.messier-objects.com/messier-60/">Messier 60</a><br /> <a href="https://www.messier-objects.com/messier-61/">Messier 61</a><br /> <a href="https://www.messier-objects.com/messier-62/">Messier 62</a><br /> <a href="https://www.messier-objects.com/messier-63-sunflower-galaxy/">Messier 63: Sunflower Galaxy</a><br /> <a href="https://www.messier-objects.com/messier-64-black-eye-galaxy/">Messier 64: Black Eye Galaxy</a><br /> * <a href="https://www.messier-objects.com/leo-triplet/">Leo Triplet</a><br /> <a href="https://www.messier-objects.com/messier-65/">Messier 65</a><br /> <a href="https://www.messier-objects.com/messier-66/">Messier 66</a><br /> * <a href="https://www.messier-objects.com/ngc-3628-hamburger-galaxy/">NGC 3628: Hamburger Galaxy</a><br /> <a href="https://www.messier-objects.com/messier-67-king-cobra-cluster/">Messier 67: King Cobra Cluster</a><br /> <a href="https://www.messier-objects.com/messier-68/">Messier 68</a><br /> <a href="https://www.messier-objects.com/messier-69/">Messier 69</a><br /> <a href="https://www.messier-objects.com/messier-70/">Messier 70</a><br /> <a href="https://www.messier-objects.com/messier-71/">Messier 71</a><br /> <a href="https://www.messier-objects.com/messier-72/">Messier 72</a><br /> <a href="https://www.messier-objects.com/messier-73/">Messier 73</a><br /> <a href="https://www.messier-objects.com/messier-74-phantom-galaxy/">Messier 74: Phantom Galaxy</a><br /> <a href="https://www.messier-objects.com/messier-75/">Messier 75</a><br /> <a href="https://www.messier-objects.com/messier-76-little-dumbbell-nebula/">Messier 76: Little Dumbbell Nebula</a><br /> <a href="https://www.messier-objects.com/messier-77-cetus-a/">Messier 77: Cetus A</a><br /> <a href="https://www.messier-objects.com/messier-78/">Messier 78</a><br /> <a href="https://www.messier-objects.com/messier-79/">Messier 79</a><br /> <a href="https://www.messier-objects.com/messier-80/">Messier 80</a><br /> <a href="https://www.messier-objects.com/messier-81-bodes-galaxy/">Messier 81: Bode's Galaxy</a><br /> <a href="https://www.messier-objects.com/messier-82-cigar-galaxy/">Messier 82: Cigar Galaxy</a><br /> <a href="https://www.messier-objects.com/messier-83-southern-pinwheel-galaxy/">Messier 83: Southern Pinwheel Galaxy</a><br /> <a href="https://www.messier-objects.com/messier-84/">Messier 84</a><br /> <a href="https://www.messier-objects.com/messier-85/">Messier 85</a><br /> <a href="https://www.messier-objects.com/messier-86/">Messier 86</a><br /> <a href="https://www.messier-objects.com/messier-87-virgo-a/">Messier 87: Virgo A</a><br /> <a href="https://www.messier-objects.com/messier-88/">Messier 88</a><br /> <a href="https://www.messier-objects.com/messier-89/">Messier 89</a><br /> <a href="https://www.messier-objects.com/messier-90/">Messier 90</a><br /> <a href="https://www.messier-objects.com/messier-91/">Messier 91</a><br /> <a href="https://www.messier-objects.com/messier-92/">Messier 92</a><br /> <a href="https://www.messier-objects.com/messier-93/">Messier 93</a><br /> <a href="https://www.messier-objects.com/messier-94-cats-eye-galaxy/">Messier 94: Cat's Eye Galaxy</a><br /> <a href="https://www.messier-objects.com/messier-95/">Messier 95</a><br /> <a 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