NGC 1193

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
See also: Open cluster, List of open clusters

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

• Hyades (star cluster)
• Trapezium Cluster
• Eagle Nebula