NGC 2331
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| AladinLite | |
| Constellation | Twins |
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Position equinox : J2000.0 |
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|---|---|
| Right ascension | 07 h 06 m 59.8 s |
| declination | + 27 ° 15 ′ 42 ″ |
| Appearance
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| classification | IV1p |
| Brightness (visual) | 8.5 likes |
| Angular expansion | 19.0 ' |
| Physical data
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| distance | 4200 ly (1285 pc ) |
| history | |
| Discovered by | William Herschel |
| Discovery time | March 11, 1785 |
| Catalog names | |
| NGC 2331 • C 704 + 274 • OCl 475 • Cr 126 • Lund 295 • GC GC 1490 • H VIII 40 • h h 432 • | |
NGC 2331 is an open cluster of Trumpler type IV1p in the constellation Gemini in the northern sky . The cluster has a brightness of 8.5 mag and a diameter of 19 arc minutes .
The object was discovered on March 11, 1785 by William Herschel .