The Brightest Open Clusters in the Sky

Name Constellation Magnitude
Name Constellation Magnitude
1 Orion's Belt Orion 0.6
2 Collinder 173 Puppis 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 IC 2391 Vela 2.5
13 NGC 1980 Orion 2.5
14 NGC 6231 Scorpius 2.6
15 Omicron Canis Minorum Cluster Canis Major 2.6
16 NGC 2451 Puppis 2.8
17 Lambda Orionis Cluster Orion 2.8
18 NGC 3532 Carina 3.0
19 Collinder 65 Orion 3.0
20 Melotte 186 Ophiuchus 3.0
21 Collinder 359 Ophiuchus 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 Collinder 249 Centaurus 4.0
30 IC 2395 Vela 4.0
31 IC 2581 Carina 4.0
32 NGC 2264 Monoceros 4.1
33 NGC 2362 Canis Major 4.1
34 M6 Scorpius 4.2
35 Collinder 464 Camelopardalis 4.2
36 NGC 2232 Monoceros 4.2
37 IC 4665 Ophiuchus 4.2
38 NGC 3114 Carina 4.2
39 NGC 4755 Crux 4.2
40 NGC 1981 Orion 4.2
41 Collinder 62 Auriga 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 M25 Sagittarius 4.6
47 M39 Cygnus 4.6
48 NGC 6530 Sagittarius 4.6
49 IC 4756 Serpens Cauda 4.6
50 Collinder 106 Monoceros 4.6
51 NGC 6633 Ophiuchus 4.6
52 NGC 2547 Vela 4.7
53 NGC 3293 Carina 4.7
54 NGC 2244 Monoceros 4.8
55 NGC 2239 Monoceros 4.8
56 Collinder 233 Carina 5.0
57 Collinder 234 Carina 5.0
58 Collinder 203 Vela 5.0
59 M35 Gemini 5.1
60 NGC 6025 Triangulum Australe 5.1
61 Collinder 107 Monoceros 5.1
62 M34 Perseus 5.2
63 NGC 6193 Ara 5.2
64 NGC 6871 Cygnus 5.2
65 Collinder 411 Octans 5.3
66 NGC 3766 Centaurus 5.3
67 NGC 6087 Norma 5.4
68 Collinder 97 Monoceros 5.4
69 NGC 2281 Auriga 5.4
70 NGC 6281 Scorpius 5.4
71 M23 Sagittarius 5.5
72 Collinder 230 Carina 5.5
73 NGC 5662 Centaurus 5.5
74 NGC 6374 Scorpius 5.5
75 M37 Auriga 5.6
76 NGC 6067 Norma 5.6
77 NGC 7686 Andromeda 5.6
78 NGC 5460 Centaurus 5.6
79 NGC 752 Andromeda 5.7
80 NGC 6416 Scorpius 5.7
81 Collinder 89 Gemini 5.7
82 NGC 6885 Vulpecula 5.7
83 M11 Scutum 5.8
84 M48 Hydra 5.8
85 NGC 2477 Puppis 5.8
86 NGC 6124 Scorpius 5.8
87 M21 Sagittarius 5.9
88 M50 Monoceros 5.9
89 NGC 6250 Ara 5.9
90 NGC 2169 Orion 5.9
91 Collinder 29 Perseus 5.9
92 NGC 5281 Centaurus 5.9
93 M16 Serpens Cauda 6.0
94 M17 Sagittarius 6.0
95 M36 Auriga 6.0
96 NGC 6322 Scorpius 6.0
97 NGC 2301 Monoceros 6.0
98 NGC 3228 Vela 6.0
99 NGC 6605 Serpens Cauda 6.0
100 IC 4703 Serpens Cauda 6.0
101 NGC 5316 Centaurus 6.0
102 M46 Puppis 6.1
103 NGC 884 Perseus 6.1
104 NGC 7160 Cepheus 6.1
105 NGC 1746 Taurus 6.1
106 Collinder 202 Vela 6.1
107 NGC 2669 Vela 6.1
108 Collinder 350 Ophiuchus 6.1
109 M93 Puppis 6.2
110 NGC 1545 Perseus 6.2
111 M20 Sagittarius 6.3
112 NGC 2546 Puppis 6.3
113 NGC 6940 Vulpecula 6.3
114 Collinder 394 Sagittarius 6.3
115 NGC 5617 Centaurus 6.3
116 M38 Auriga 6.4
117 NGC 457 Cassiopeia 6.4
118 NGC 1528 Perseus 6.4
119 NGC 1647 Taurus 6.4
120 NGC 1662 Orion 6.4
121 Collinder 91 Monoceros 6.4
122 NGC 6242 Scorpius 6.4
123 NGC 7243 Lacerta 6.4
124 Collinder 367 Sagittarius 6.4
125 NGC 6604 Serpens Cauda 6.5
126 NGC 129 Cassiopeia 6.5
127 NGC 654 Cassiopeia 6.5
128 NGC 2527 Puppis 6.5
129 NGC 2539 Puppis 6.5
130 NGC 5822 Lupus 6.5
131 NGC 2354 Canis Major 6.5
132 IC 1805 Cassiopeia 6.5
133 M29 Cygnus 6.6
134 NGC 1444 Perseus 6.6
135 NGC 6169 Norma 6.6
136 NGC 3572 Carina 6.6
137 Collinder 316 Scorpius 6.6
138 NGC 6709 Aquila 6.7
139 Collinder 336 Scorpius 6.7
140 NGC 1027 Cassiopeia 6.7
141 NGC 1342 Perseus 6.7
142 NGC 6167 Norma 6.7
143 NGC 7789 Cassiopeia 6.7
144 NGC 2423 Puppis 6.7
145 NGC 2343 Monoceros 6.7
146 Collinder 197 Vela 6.7
147 NGC 3324 Carina 6.7
148 NGC 2129 Gemini 6.7
149 IC 1848 Cassiopeia 6.8
150 NGC 2175 Orion 6.8
151 Collinder 232 Carina 6.8
152 NGC 6811 Cygnus 6.8
153 M18 Sagittarius 6.9
154 M52 Cassiopeia 6.9
155 M67 Cancer 6.9
156 IC 4651 Ara 6.9
157 NGC 2439 Puppis 6.9
158 NGC 1502 Camelopardalis 6.9
159 Collinder 299 Norma 6.9
160 NGC 4609 Crux 6.9
161 Collinder 241 Carina 6.9
162 NGC 225 Cassiopeia 7.0
163 Collinder 36 Cassiopeia 7.0
164 NGC 2571 Puppis 7.0
165 Collinder 111 Monoceros 7.0
166 NGC 1582 Perseus 7.0
167 NGC 7063 Cygnus 7.0
168 Collinder 231 Carina 7.0
169 NGC 1807 Taurus 7.0
170 NGC 6595 Sagittarius 7.0
171 NGC 1857 Auriga 7.0
172 Collinder 401 Aquila 7.0
173 NGC 663 Cassiopeia 7.1
174 NGC 2353 Monoceros 7.1
175 Collinder 258 Crux 7.1
176 NGC 2467 Puppis 7.1
177 NGC 6823 Vulpecula 7.1
178 Collinder 155 Puppis 7.1
179 NGC 2360 Canis Major 7.2
180 NGC 4463 Musca 7.2
181 NGC 2335 Monoceros 7.2
182 NGC 7082 Cygnus 7.2
183 NGC 6208 Ara 7.2
184 NGC 6134 Norma 7.2
185 NGC 6425 Scorpius 7.2
186 NGC 2910 Vela 7.2
187 NGC 6178 Scorpius 7.2
188 NGC 7380 Cepheus 7.2
189 Collinder 21 Triangulum 7.3
190 NGC 6819 Cygnus 7.3
191 NGC 2251 Monoceros 7.3
192 IC 348 Perseus 7.3
193 NGC 2482 Puppis 7.3
194 Collinder 96 Monoceros 7.3
195 IC 4996 Cygnus 7.3
196 NGC 2645 Vela 7.3
197 M103 Cassiopeia 7.4
198 NGC 2384 Canis Major 7.4
199 NGC 6910 Cygnus 7.4
200 NGC 4103 Crux 7.4

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