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| NGC 146 | |
|---|---|
Location of NGC 146
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| Observation data (J2000 epoch) | |
| Right ascension | 00h33m 03.9s[1] |
| Declination | +63° 18′ 32″[1] |
| Distance | ~10000 (~3000) |
| Apparent magnitude (V) | 9.1[2] |
| Physical characteristics | |
| Estimated age | <10 Myr |
| Other designations | Cr 5, OCl 299, C 0030+630[2] |
| Associations | |
| Constellation | Cassiopeia |
| See also: Open cluster, List of open clusters | |
NGC 146 is a small open cluster in the constellation Cassiopeia. It was discovered by John Herschel in 1829 using his father's 18.7 inch reflecting telescope.[3]
NGC 146 is fairly easy to locate in the sky, being half a degree away from the bright star Kappa Cassiopeiae. However, spotting the cluster itself is difficult because of its low apparent magnitude of 9.1. Its relatively high declination of about 63° means it is not visible for below 27° S. Its distance is estimated at 3030 parsecs (9880 light years ),[4] but may be around 3500 pc (11000 ly) away.[5]
The cluster is at most 10 million years old, as there are numerous B-type main sequence stars and pre-main-sequence stars but relatively few evolved supergiants. Among its most massive stars are two Herbig Be stars.[5]
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