NGC 1193 is an open cluster in the Perseus constellation.[1] It was first observed and catalogued by astronomer William Herschel in 1786.[3] The cluster is estimated to be approximately 4.2 billion years old.[4]
| NGC 1193 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Right ascension | 03h 05m 55.0s[1] |
| Declination | +44° 23′ 00″[1] |
| Distance | ~14024 ly from the sun (4300 pc)[2] |
| Apparent magnitude (V) | 12.6[1] |
| Apparent dimensions (V) | 3.0 arcmin[1] |
| Physical characteristics | |
| Other designations | OCL 390[1] |
| Associations | |
Stellar population
NGC 1193 is usually classified as a Trumpler type II3m,[5] indicating its stellar population have a wide range of brightness, from very bright to faint stars and little star concentration in the center of the cluster. The letter 'm' on the Trumpler classification indicates a population of 50 to a 100 stars. However a study released in 2022[5] indicates a population of approximately 181 stars in the cluster, possibly changing the type from II3m to II3r. A photometric study of this galaxy carried out in 1988 revealed a small population of 5 blue straggler stars, a number of subgiant branch stars and red giant branch stars.[5]
See also
References
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