NGC 1245 explained

NGC 1245
Type:	Open Cluster
Epoch:	J2000
Constellation:	Perseus
Ra:	^[1]
Dist Ly:	9,800 ly
Dist Pc:	3 kpc
Appmag V:	8.4
Size V:	10'
Age:	1,06 billion years
Names:	Cr 38

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. NGC 1245 has about 200 members the brightest of which are of 12th magnitude.^[4] The cluster shows evidence of mass segregation and it is possible that it has lost its lower mass members.^[5] Lying at a distance of 3kpc, the cluster is estimated to be 27 light years across.^[6]

Notes and References

1. NGC 1245. 2015-06-19.
2. Book: Stephen James O'Meara. Deep-Sky Companions: The Secret Deep, vol. 4. 2011. Cambridge University Press. 978-1-139-50007-4. 52.
3. Book: Craig Crossen, Gerald Rhemann. Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes. 2012. Springer Science & Business Media. 9783709106266. 93. 18 March 2015.
4. Book: O'Meara. Steve. Steve O'Meara's Herschel 400 observing guide. 2007. Cambridge university press. Cambridge. 978-0521858939. 327. 18 March 2016.
5. Lee. S. H.. Kang. Y.-W.. Ann. H. B.. 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. 11 September 2012. 425. 2. 1567–1575. 10.1111/j.1365-2966.2012.21593.x. 1208.1080 . 2012MNRAS.425.1567L . 119268141.
6. Subramaniam, A.. NGC 1245 - an intermediate age open cluster. Bulletin of the Astronomical Society of India. 2003. 31. 49–64. astro-ph/0303319 . 2003BASI...31...49S .