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 C41 Taurus 1.0
4 Antares Cluster Scorpius 1.0
5 Alpha Persei Cluster Perseus 1.2
6 Collinder 39 Perseus 1.2
7 M45 Taurus 1.3
8 Collinder 256 Coma Berenices 1.8
9 Coma Star Cluster 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 Lambda Orionis Cluster Orion 2.8
17 Collinder 359 Ophiuchus 3.0
18 NGC 3532 Carina 3.0
19 Melotte 186 Ophiuchus 3.0
20 Collinder 65 Orion 3.0
21 M44 Cancer 3.1
22 M7 Scorpius 3.3
23 Tuft in the Tail of the Dog Canis Major 3.5
24 Collinder 132 Canis Major 3.6
25 Brocchi's Cluster Vulpecula 3.6
26 NGC 2516 Carina 3.8
27 IC 2395 Vela 4.0
28 M42 Orion 4.0
29 Collinder 249 Centaurus 4.0
30 IC 2581 Carina 4.0
31 NGC 2362 Canis Major 4.1
32 NGC 2264 Monoceros 4.1
33 IC 4665 Ophiuchus 4.2
34 NGC 4755 Crux 4.2
35 M6 Scorpius 4.2
36 Collinder 62 Auriga 4.2
37 Collinder 464 Camelopardalis 4.2
38 NGC 1981 Orion 4.2
39 NGC 3114 Carina 4.2
40 NGC 869 Perseus 4.3
41 Collinder 228 Carina 4.4
42 M47 Puppis 4.4
43 M41 Canis Major 4.5
44 NGC 6633 Ophiuchus 4.6
45 M25 Sagittarius 4.6
46 Collinder 106 Monoceros 4.6
47 IC 4756 Serpens Cauda 4.6
48 M39 Cygnus 4.6
49 NGC 6530 Sagittarius 4.6
50 NGC 2547 Vela 4.7
51 NGC 3293 Carina 4.7
52 NGC 2239 Monoceros 4.8
53 Collinder 203 Vela 5.0
54 Collinder 234 Carina 5.0
55 Collinder 233 Carina 5.0
56 Collinder 107 Monoceros 5.1
57 M35 Gemini 5.1
58 NGC 6025 Triangulum Australe 5.1
59 NGC 6193 Ara 5.2
60 NGC 6871 Cygnus 5.2
61 M34 Perseus 5.2
62 Collinder 411 Octans 5.3
63 NGC 3766 Centaurus 5.3
64 NGC 6087 Norma 5.4
65 NGC 2281 Auriga 5.4
66 Collinder 97 Monoceros 5.4
67 NGC 6281 Scorpius 5.4
68 NGC 5662 Centaurus 5.5
69 Collinder 230 Carina 5.5
70 M23 Sagittarius 5.5
71 NGC 6374 Scorpius 5.5
72 M37 Auriga 5.6
73 NGC 6067 Norma 5.6
74 NGC 5460 Centaurus 5.6
75 Collinder 89 Gemini 5.7
76 NGC 6416 Scorpius 5.7
77 NGC 752 Andromeda 5.7
78 NGC 2477 Puppis 5.8
79 M48 Hydra 5.8
80 M11 Scutum 5.8
81 NGC 6124 Scorpius 5.8
82 NGC 5281 Centaurus 5.9
83 NGC 6250 Ara 5.9
84 M50 Monoceros 5.9
85 NGC 2169 Orion 5.9
86 M21 Sagittarius 5.9
87 Collinder 29 Perseus 5.9
88 M17 Sagittarius 6.0
89 M36 Auriga 6.0
90 M16 Serpens Cauda 6.0
91 NGC 2301 Monoceros 6.0
92 NGC 3228 Vela 6.0
93 NGC 5316 Centaurus 6.0
94 NGC 6322 Scorpius 6.0
95 Collinder 350 Ophiuchus 6.1
96 NGC 884 Perseus 6.1
97 NGC 1746 Taurus 6.1
98 Collinder 202 Vela 6.1
99 NGC 7160 Cepheus 6.1
100 NGC 2669 Vela 6.1
101 M46 Puppis 6.1
102 NGC 1545 Perseus 6.2
103 M93 Puppis 6.2
104 Collinder 394 Sagittarius 6.3
105 NGC 2546 Puppis 6.3
106 NGC 5617 Centaurus 6.3
107 NGC 6940 Vulpecula 6.3
108 M20 Sagittarius 6.3
109 M38 Auriga 6.4
110 Collinder 367 Sagittarius 6.4
111 NGC 457 Cassiopeia 6.4
112 NGC 1528 Perseus 6.4
113 NGC 1662 Orion 6.4
114 NGC 6242 Scorpius 6.4
115 NGC 1647 Taurus 6.4
116 Collinder 91 Monoceros 6.4
117 NGC 7243 Lacerta 6.4
118 NGC 129 Cassiopeia 6.5
119 NGC 5822 Lupus 6.5
120 NGC 654 Cassiopeia 6.5
121 NGC 2539 Puppis 6.5
122 IC 1805 Cassiopeia 6.5
123 NGC 2354 Canis Major 6.5
124 NGC 2527 Puppis 6.5
125 NGC 6604 Serpens Cauda 6.5
126 M29 Cygnus 6.6
127 NGC 1444 Perseus 6.6
128 Collinder 316 Scorpius 6.6
129 NGC 3572 Carina 6.6
130 Collinder 336 Scorpius 6.7
131 NGC 6167 Norma 6.7
132 NGC 1342 Perseus 6.7
133 NGC 3324 Carina 6.7
134 NGC 2343 Monoceros 6.7
135 NGC 2423 Puppis 6.7
136 NGC 6709 Aquila 6.7
137 NGC 2129 Gemini 6.7
138 NGC 7789 Cassiopeia 6.7
139 NGC 1027 Cassiopeia 6.7
140 Collinder 197 Vela 6.7
141 NGC 6811 Cygnus 6.8
142 Collinder 232 Carina 6.8
143 IC 1848 Cassiopeia 6.8
144 NGC 2175 Orion 6.8
145 M67 Cancer 6.9
146 M18 Sagittarius 6.9
147 IC 4651 Ara 6.9
148 M52 Cassiopeia 6.9
149 Collinder 241 Carina 6.9
150 NGC 4609 Crux 6.9
151 NGC 1502 Camelopardalis 6.9
152 Collinder 299 Norma 6.9
153 NGC 2439 Puppis 6.9
154 NGC 225 Cassiopeia 7.0
155 Collinder 111 Monoceros 7.0
156 Collinder 231 Carina 7.0
157 Collinder 36 Cassiopeia 7.0
158 NGC 2571 Puppis 7.0
159 NGC 7063 Cygnus 7.0
160 Collinder 401 Aquila 7.0
161 NGC 1582 Perseus 7.0
162 NGC 663 Cassiopeia 7.1
163 Collinder 155 Puppis 7.1
164 Collinder 258 Crux 7.1
165 NGC 2467 Puppis 7.1
166 NGC 6823 Vulpecula 7.1
167 NGC 2353 Monoceros 7.1
168 NGC 6208 Ara 7.2
169 NGC 7380 Cepheus 7.2
170 NGC 2360 Canis Major 7.2
171 NGC 7082 Cygnus 7.2
172 NGC 4463 Musca 7.2
173 NGC 2335 Monoceros 7.2
174 NGC 6134 Norma 7.2
175 NGC 6425 Scorpius 7.2
176 NGC 2910 Vela 7.2
177 NGC 6178 Scorpius 7.2
178 IC 348 Perseus 7.3
179 Collinder 21 Triangulum 7.3
180 Collinder 96 Monoceros 7.3
181 IC 4996 Cygnus 7.3
182 NGC 2251 Monoceros 7.3
183 NGC 6819 Cygnus 7.3
184 NGC 2482 Puppis 7.3
185 NGC 2645 Vela 7.3
186 Collinder 142 Canis Major 7.4
187 NGC 3330 Vela 7.4
188 NGC 4103 Crux 7.4
189 NGC 2396 Puppis 7.4
190 NGC 6910 Cygnus 7.4
191 NGC 6200 Ara 7.4
192 M103 Cassiopeia 7.4
193 NGC 4349 Crux 7.4
194 IC 1590 Cassiopeia 7.4
195 NGC 2567 Puppis 7.4
196 IC 2488 Vela 7.4
197 NGC 6716 Sagittarius 7.5
198 NGC 1893 Auriga 7.5
199 NGC 2579 Puppis 7.5
200 Collinder 343 Scorpius 7.5

Seattle

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Longitude:
Timezone:

47.61°N
122.33°W
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