Messier 93
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| The open star cluster Messier 93 2MASS catalog |
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| AladinLite | |
| Constellation | Aft deck of the ship |
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Position equinox : J2000.0 |
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|---|---|
| Right ascension | 07 h 44 m 30 s |
| declination | -23 ° 51 ′ 24 ″ |
| Appearance
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| classification | I, 3, r (Trumpler), g (Shapley) |
| Brightness (visual) | 6.2 mag |
| Brightness (B-band) | 6.57 mag |
| Angular expansion | 22 ' |
| Number of stars | 80 |
| Physical data
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| Redshift | (71 ± 2) · 10 −6 |
| Radial velocity | (21.31 ± 0.67) km / s |
| distance | 3600 ly (1100 pc ) |
| diameter | 20 to 25 years |
| Age | approx. 100 million years |
| history | |
| Discovered by | Charles Messier |
| Discovery time | March 20, 1781 |
| Catalog names | |
| M 93 • NGC 2447 • C 0742-237 • OCl 649 • Mel 76 • Cr 160 • ESO 493-SC7 • | |
Messier 93 (also known as NGC 2447 ) is a +6.2 mag bright open star cluster with an area of 22 'in the constellation aft deck of the ship . The cluster is about 3600 light years away and is estimated to be about 100 million years old.
