NGC 1193

NGC 1193
Observation data (J2000 epoch)
Right ascension	03^h 05^m 55.0^s[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

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]

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

References

1. "Revised NGC Data for NGC 1193". spider.seds.org. Retrieved 2023-12-06.
2. "WEBDA result for NGC 1193". webda.physics.muni.cz.
3. "revised Herschel catalogue". www.klima-luft.de. Retrieved 2023-12-06.
4. Salaris, M.; Weiss, A.; Percival, S. M. (2004-01-01). "The age of the oldest Open Clusters". Astronomy and Astrophysics. 414: 163–174. arXiv:astro-ph/0310363. Bibcode:2004A&A...414..163S. doi:10.1051/0004-6361:20031578. ISSN 0004-6361.
5. Yontan, T.; Çakmak, T.; Bilir, S.; Banks, T.; Raúl, M.; Canbay, R.; Koç, S.; Taşdemir, S.; Erçay, H.; Tanık Oztürk, B.; Dursun, D. C. (2022-10-01). "A Study of the NGC 1193 and NGC 1798 Open Clusters Using CCD UBV Photometric and Gaia EDR3 Data". Revista Mexicana de Astronomía y Astrofísica. 58 (2): 333–353. arXiv:2207.06407. Bibcode:2022RMxAA..58..333Y. doi:10.22201/ia.01851101p.2022.58.02.14. ISSN 0185-1101.