NGC 1245

NGC 1245
Observation data (J2000 epoch)
Constellation	Perseus
Right ascension	03^h 14^m 48^s[1]
Declination	+47° 15′ 11″[1]
Distance	9,800 ly (3 kpc)
Apparent magnitude (V)	8.4 [1]
Apparent dimensions (V)	10'
Physical characteristics
Estimated age	1,06 billion years

NGC 1245 is an open cluster in the constellation Perseus. It was discovered by William Herschel in 11 December, 1786.^[2] It is located 3° southwest of alpha Persei and can be spotted with 10x50 binoculars.^[3] The cluster is nearly 1 billion years old.^[4] NGC 1245 has about 200 members the brightest of which are of 12th magnitude.^[5] The cluster shows evidence of mass segredation and it is possible that it has lost its lower mass members.^[6] Lying at a distance of 3kpc, the cluster is estimated to be 27 light years across.^[4]

References

1. "SIMBAD Astronomical Database". Results for NGC 1245. Retrieved 2015-06-19.
2. Stephen James O'Meara (2011). Deep-Sky Companions: The Secret Deep, vol. 4. Cambridge University Press. p. 52. ISBN 1139500074.
3. Craig Crossen, Gerald Rhemann (2012). Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes. Springer Science & Business Media. p. 93. ISBN 9783709106266. Retrieved 18 March 2015.
4. Subramaniam, A. (2003). "NGC 1245 - an intermediate age open cluster". Bulletin of the Astronomical Society of India 31: 49–64. Retrieved 18 March 2016.
5. O'Meara, Steve (2007). Steve O'Meara's Herschel 400 observing guide. Cambridge: Cambridge university press. p. 327. ISBN 0521858933. Retrieved 18 March 2016.
6. Lee, S. H.; Kang, Y.-W.; Ann, H. B. (11 September 2012). "Deep and wide photometry of the two open clusters NGC 1245 and NGC 2506: CCD observation and physical properties". Monthly Notices of the Royal Astronomical Society 425 (2): 1567–1575. doi:10.1111/j.1365-2966.2012.21593.x.