The Brightest Open Clusters in the Sky

Name Constellation Magnitude
Name Constellation Magnitude
1 Collinder 173 Puppis 0.6
2 Orion's Belt Orion 0.6
3 Antares Cluster Scorpius 1.0
4 C41 Taurus 1.0
5 Collinder 39 Perseus 1.2
6 Alpha Persei Cluster Perseus 1.2
7 M45 Taurus 1.3
8 Coma Star Cluster Coma Berenices 1.8
9 Collinder 256 Coma Berenices 1.8
10 IC 2602 Carina 1.9
11 Collinder 135 Puppis 2.1
12 NGC 1980 Orion 2.5
13 IC 2391 Vela 2.5
14 Omicron Canis Minorum Cluster Canis Major 2.6
15 NGC 6231 Scorpius 2.6
16 NGC 2451 Puppis 2.8
17 Lambda Orionis Cluster Orion 2.8
18 NGC 3532 Carina 3.0
19 Melotte 186 Ophiuchus 3.0
20 Collinder 359 Ophiuchus 3.0
21 Collinder 65 Orion 3.0
22 M44 Cancer 3.1
23 M7 Scorpius 3.3
24 Tuft in the Tail of the Dog Canis Major 3.5
25 Collinder 132 Canis Major 3.6
26 Brocchi's Cluster Vulpecula 3.6
27 NGC 2516 Carina 3.8
28 M42 Orion 4.0
29 IC 2395 Vela 4.0
30 Collinder 249 Centaurus 4.0
31 IC 2581 Carina 4.0
32 NGC 2264 Monoceros 4.1
33 NGC 2362 Canis Major 4.1
34 Collinder 464 Camelopardalis 4.2
35 NGC 1981 Orion 4.2
36 NGC 2232 Monoceros 4.2
37 NGC 4755 Crux 4.2
38 NGC 3114 Carina 4.2
39 M6 Scorpius 4.2
40 Collinder 62 Auriga 4.2
41 IC 4665 Ophiuchus 4.2
42 NGC 869 Perseus 4.3
43 M47 Puppis 4.4
44 Collinder 228 Carina 4.4
45 M41 Canis Major 4.5
46 NGC 6633 Ophiuchus 4.6
47 NGC 6530 Sagittarius 4.6
48 M39 Cygnus 4.6
49 Collinder 106 Monoceros 4.6
50 IC 4756 Serpens Cauda 4.6
51 M25 Sagittarius 4.6
52 NGC 3293 Carina 4.7
53 NGC 2547 Vela 4.7
54 NGC 2244 Monoceros 4.8
55 NGC 2239 Monoceros 4.8
56 Collinder 234 Carina 5.0
57 Collinder 233 Carina 5.0
58 Collinder 203 Vela 5.0
59 Collinder 107 Monoceros 5.1
60 M35 Gemini 5.1
61 NGC 6025 Triangulum Australe 5.1
62 NGC 6871 Cygnus 5.2
63 NGC 6193 Ara 5.2
64 M34 Perseus 5.2
65 NGC 3766 Centaurus 5.3
66 Collinder 411 Octans 5.3
67 NGC 2281 Auriga 5.4
68 NGC 6281 Scorpius 5.4
69 NGC 6087 Norma 5.4
70 Collinder 97 Monoceros 5.4
71 NGC 6374 Scorpius 5.5
72 M23 Sagittarius 5.5
73 NGC 5662 Centaurus 5.5
74 Collinder 230 Carina 5.5
75 NGC 7686 Andromeda 5.6
76 M37 Auriga 5.6
77 NGC 6067 Norma 5.6
78 NGC 5460 Centaurus 5.6
79 Collinder 89 Gemini 5.7
80 NGC 752 Andromeda 5.7
81 NGC 6416 Scorpius 5.7
82 NGC 6885 Vulpecula 5.7
83 NGC 6124 Scorpius 5.8
84 M48 Hydra 5.8
85 M11 Scutum 5.8
86 NGC 2477 Puppis 5.8
87 NGC 5281 Centaurus 5.9
88 M21 Sagittarius 5.9
89 Collinder 29 Perseus 5.9
90 M50 Monoceros 5.9
91 NGC 6250 Ara 5.9
92 NGC 2169 Orion 5.9
93 NGC 6322 Scorpius 6.0
94 NGC 6605 Serpens Cauda 6.0
95 M17 Sagittarius 6.0
96 M36 Auriga 6.0
97 M16 Serpens Cauda 6.0
98 NGC 3228 Vela 6.0
99 IC 4703 Serpens Cauda 6.0
100 NGC 5316 Centaurus 6.0
101 NGC 2301 Monoceros 6.0
102 NGC 1746 Taurus 6.1
103 NGC 884 Perseus 6.1
104 NGC 7160 Cepheus 6.1
105 NGC 2669 Vela 6.1
106 Collinder 202 Vela 6.1
107 M46 Puppis 6.1
108 Collinder 350 Ophiuchus 6.1
109 NGC 1545 Perseus 6.2
110 M93 Puppis 6.2
111 M20 Sagittarius 6.3
112 NGC 6940 Vulpecula 6.3
113 NGC 5617 Centaurus 6.3
114 NGC 2546 Puppis 6.3
115 Collinder 394 Sagittarius 6.3
116 NGC 1528 Perseus 6.4
117 Collinder 91 Monoceros 6.4
118 NGC 457 Cassiopeia 6.4
119 M38 Auriga 6.4
120 Collinder 367 Sagittarius 6.4
121 NGC 1662 Orion 6.4
122 NGC 1647 Taurus 6.4
123 NGC 6242 Scorpius 6.4
124 NGC 7243 Lacerta 6.4
125 NGC 5822 Lupus 6.5
126 NGC 6604 Serpens Cauda 6.5
127 IC 1805 Cassiopeia 6.5
128 NGC 2539 Puppis 6.5
129 NGC 2354 Canis Major 6.5
130 NGC 129 Cassiopeia 6.5
131 NGC 654 Cassiopeia 6.5
132 NGC 2527 Puppis 6.5
133 Collinder 316 Scorpius 6.6
134 NGC 1444 Perseus 6.6
135 M29 Cygnus 6.6
136 NGC 6169 Norma 6.6
137 NGC 3572 Carina 6.6
138 NGC 7789 Cassiopeia 6.7
139 NGC 1027 Cassiopeia 6.7
140 NGC 2343 Monoceros 6.7
141 NGC 3324 Carina 6.7
142 NGC 2423 Puppis 6.7
143 NGC 6709 Aquila 6.7
144 Collinder 336 Scorpius 6.7
145 NGC 2129 Gemini 6.7
146 NGC 1342 Perseus 6.7
147 Collinder 197 Vela 6.7
148 NGC 6167 Norma 6.7
149 IC 1848 Cassiopeia 6.8
150 Collinder 232 Carina 6.8
151 NGC 2175 Orion 6.8
152 NGC 6811 Cygnus 6.8
153 NGC 2439 Puppis 6.9
154 Collinder 299 Norma 6.9
155 M67 Cancer 6.9
156 NGC 1502 Camelopardalis 6.9
157 M18 Sagittarius 6.9
158 M52 Cassiopeia 6.9
159 NGC 4609 Crux 6.9
160 Collinder 241 Carina 6.9
161 IC 4651 Ara 6.9
162 Collinder 36 Cassiopeia 7.0
163 Collinder 111 Monoceros 7.0
164 NGC 1857 Auriga 7.0
165 NGC 2571 Puppis 7.0
166 Collinder 231 Carina 7.0
167 NGC 1807 Taurus 7.0
168 NGC 6595 Sagittarius 7.0
169 Collinder 401 Aquila 7.0
170 NGC 7063 Cygnus 7.0
171 NGC 225 Cassiopeia 7.0
172 NGC 1582 Perseus 7.0
173 Collinder 155 Puppis 7.1
174 Collinder 258 Crux 7.1
175 NGC 6823 Vulpecula 7.1
176 NGC 663 Cassiopeia 7.1
177 NGC 2467 Puppis 7.1
178 NGC 2353 Monoceros 7.1
179 NGC 2910 Vela 7.2
180 NGC 6134 Norma 7.2
181 NGC 2335 Monoceros 7.2
182 NGC 6208 Ara 7.2
183 NGC 7380 Cepheus 7.2
184 NGC 6425 Scorpius 7.2
185 NGC 2360 Canis Major 7.2
186 NGC 7082 Cygnus 7.2
187 NGC 6178 Scorpius 7.2
188 NGC 4463 Musca 7.2
189 Collinder 96 Monoceros 7.3
190 Collinder 21 Triangulum 7.3
191 NGC 2482 Puppis 7.3
192 IC 4996 Cygnus 7.3
193 IC 348 Perseus 7.3
194 NGC 6819 Cygnus 7.3
195 NGC 2251 Monoceros 7.3
196 NGC 2645 Vela 7.3
197 M103 Cassiopeia 7.4
198 IC 2488 Vela 7.4
199 NGC 4349 Crux 7.4
200 NGC 2384 Canis Major 7.4

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