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 Collinder 65 Orion 3.0
19 Melotte 186 Ophiuchus 3.0
20 Collinder 359 Ophiuchus 3.0
21 NGC 3532 Carina 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 Brocchi's Cluster Vulpecula 3.6
26 Collinder 132 Canis Major 3.6
27 NGC 2516 Carina 3.8
28 M42 Orion 4.0
29 IC 2581 Carina 4.0
30 IC 2395 Vela 4.0
31 Collinder 249 Centaurus 4.0
32 NGC 2362 Canis Major 4.1
33 NGC 2264 Monoceros 4.1
34 M6 Scorpius 4.2
35 IC 4665 Ophiuchus 4.2
36 Collinder 62 Auriga 4.2
37 NGC 4755 Crux 4.2
38 NGC 2232 Monoceros 4.2
39 NGC 3114 Carina 4.2
40 Collinder 464 Camelopardalis 4.2
41 NGC 1981 Orion 4.2
42 C14 Perseus 4.3
43 M47 Puppis 4.4
44 Collinder 228 Carina 4.4
45 Muscleman Cluster Cassiopeia 4.4
46 M41 Canis Major 4.5
47 M25 Sagittarius 4.6
48 M39 Cygnus 4.6
49 Collinder 106 Monoceros 4.6
50 NGC 6633 Ophiuchus 4.6
51 NGC 6530 Sagittarius 4.6
52 IC 4756 Serpens Cauda 4.6
53 NGC 2547 Vela 4.7
54 NGC 3293 Carina 4.7
55 NGC 2244 Monoceros 4.8
56 Collinder 203 Vela 5.0
57 Collinder 233 Carina 5.0
58 Collinder 234 Carina 5.0
59 M35 Gemini 5.1
60 Collinder 107 Monoceros 5.1
61 NGC 6025 Triangulum Australe 5.1
62 M34 Perseus 5.2
63 NGC 6871 Cygnus 5.2
64 NGC 6193 Ara 5.2
65 NGC 3766 Centaurus 5.3
66 NGC 869 Perseus 5.3
67 Melotte 227 Octans 5.3
68 Collinder 411 Octans 5.3
69 Collinder 97 Monoceros 5.4
70 NGC 6281 Scorpius 5.4
71 NGC 6087 Norma 5.4
72 NGC 2281 Auriga 5.4
73 M23 Sagittarius 5.5
74 Collinder 230 Carina 5.5
75 NGC 6374 Scorpius 5.5
76 Collinder 334 Scorpius 5.5
77 NGC 5662 Centaurus 5.5
78 M37 Auriga 5.6
79 NGC 7686 Andromeda 5.6
80 NGC 6067 Norma 5.6
81 NGC 5460 Centaurus 5.6
82 NGC 752 Andromeda 5.7
83 NGC 6416 Scorpius 5.7
84 Collinder 89 Gemini 5.7
85 NGC 6882 Vulpecula 5.7
86 M11 Scutum 5.8
87 M48 Hydra 5.8
88 NGC 6124 Scorpius 5.8
89 NGC 2477 Puppis 5.8
90 M21 Sagittarius 5.9
91 M50 Monoceros 5.9
92 NGC 2169 Orion 5.9
93 NGC 5281 Centaurus 5.9
94 Collinder 29 Perseus 5.9
95 NGC 6250 Ara 5.9
96 M16 Serpens Cauda 6.0
97 M17 Sagittarius 6.0
98 M36 Auriga 6.0
99 NGC 6322 Scorpius 6.0
100 NGC 6605 Serpens Cauda 6.0
101 NGC 3228 Vela 6.0
102 NGC 2301 Monoceros 6.0
103 NGC 5316 Centaurus 6.0
104 M46 Puppis 6.1
105 NGC 2669 Vela 6.1
106 NGC 884 Perseus 6.1
107 NGC 7160 Cepheus 6.1
108 Collinder 350 Ophiuchus 6.1
109 NGC 1746 Taurus 6.1
110 Collinder 202 Vela 6.1
111 M93 Puppis 6.2
112 NGC 1545 Perseus 6.2
113 M20 Sagittarius 6.3
114 NGC 5617 Centaurus 6.3
115 Collinder 394 Sagittarius 6.3
116 NGC 2546 Puppis 6.3
117 NGC 6940 Vulpecula 6.3
118 M38 Auriga 6.4
119 NGC 6242 Scorpius 6.4
120 Collinder 367 Sagittarius 6.4
121 NGC 457 Cassiopeia 6.4
122 NGC 7243 Lacerta 6.4
123 NGC 1528 Perseus 6.4
124 NGC 1647 Taurus 6.4
125 NGC 1662 Orion 6.4
126 Collinder 91 Monoceros 6.4
127 NGC 129 Cassiopeia 6.5
128 NGC 6604 Serpens Cauda 6.5
129 NGC 654 Cassiopeia 6.5
130 NGC 2520 Puppis 6.5
131 NGC 2354 Canis Major 6.5
132 NGC 2539 Puppis 6.5
133 Melotte 15 Cassiopeia 6.5
134 NGC 5822 Lupus 6.5
135 M29 Cygnus 6.6
136 NGC 1444 Perseus 6.6
137 NGC 3572 Carina 6.6
138 Collinder 316 Scorpius 6.6
139 NGC 6169 Norma 6.6
140 NGC 2129 Gemini 6.7
141 NGC 7789 Cassiopeia 6.7
142 NGC 2423 Puppis 6.7
143 NGC 6709 Aquila 6.7
144 NGC 1027 Cassiopeia 6.7
145 NGC 1342 Perseus 6.7
146 NGC 6167 Norma 6.7
147 Collinder 197 Vela 6.7
148 NGC 2343 Monoceros 6.7
149 Collinder 336 Scorpius 6.7
150 NGC 3324 Carina 6.7
151 NGC 2175 Orion 6.8
152 Collinder 232 Carina 6.8
153 IC 1848 Cassiopeia 6.8
154 NGC 6811 Cygnus 6.8
155 M18 Sagittarius 6.9
156 M52 Cassiopeia 6.9
157 M67 Cancer 6.9
158 IC 4651 Ara 6.9
159 Collinder 241 Carina 6.9
160 NGC 1502 Camelopardalis 6.9
161 Collinder 299 Norma 6.9
162 NGC 2439 Puppis 6.9
163 NGC 4609 Crux 6.9
164 Zeta Sculptoris Cluster Pegasus 7.0
165 Collinder 36 Cassiopeia 7.0
166 NGC 225 Cassiopeia 7.0
167 NGC 1582 Perseus 7.0
168 NGC 1807 Taurus 7.0
169 Collinder 231 Carina 7.0
170 NGC 2571 Puppis 7.0
171 NGC 1857 Auriga 7.0
172 NGC 7063 Cygnus 7.0
173 Collinder 401 Aquila 7.0
174 Collinder 111 Monoceros 7.0
175 NGC 6823 Vulpecula 7.1
176 NGC 663 Cassiopeia 7.1
177 NGC 2467 Puppis 7.1
178 Melotte 71 Puppis 7.1
179 Collinder 155 Puppis 7.1
180 Collinder 258 Crux 7.1
181 NGC 2353 Monoceros 7.1
182 NGC 6134 Norma 7.2
183 NGC 2360 Canis Major 7.2
184 NGC 7380 Cepheus 7.2
185 NGC 4463 Musca 7.2
186 NGC 2910 Vela 7.2
187 NGC 6208 Ara 7.2
188 NGC 2335 Monoceros 7.2
189 NGC 6178 Scorpius 7.2
190 NGC 6425 Scorpius 7.2
191 NGC 7082 Cygnus 7.2
192 NGC 2409 Puppis 7.3
193 NGC 6819 Cygnus 7.3
194 Collinder 96 Monoceros 7.3
195 NGC 2251 Monoceros 7.3
196 IC 4996 Cygnus 7.3
197 NGC 2482 Puppis 7.3
198 IC 348 Perseus 7.3
199 Collinder 21 Triangulum 7.3
200 NGC 2645 Vela 7.3

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