NGC 1647

NGC 1647
Observation data (J2000 epoch)
Constellation	Taurus
Right ascension	04^h 45^m 55^s^[1]
Declination	±19° 06′ 54″^[1]
Distance	1,800 ly (on average) (550 ps^[2])
Apparent magnitude (V)	6.4 ^[1]
Apparent dimensions (V)	45'
Physical characteristics

NGC 1647 is an open cluster in the constellation Taurus. It contains nearly 90 stars and it lies at a distance of 550 parsec.^[2] It is visible even with binoculars close to Aldebaran. It was discovered by William Herschel in 1784.^[3] It is located behind Taurus dark nebula complex, approximately 160 parsec away. The brightest main sequence stars are of sprectral type B7. Its age is estimated to be 150 million years.^[4]

References

1 2 3 "SIMBAD Astronomical Database". Results for NGC 1647. Retrieved 2015-06-19.
1 2 C. A. Guerrero; J. H. Peña; J. P. Sareyan (2011). "uvby-B Photoelectric Photometry of the Open Clusters NGC 1647 and NGC 1778". Revista Mexicana de Astronomía y Astrofísica. 47 (1): 185–192. Retrieved 19 June 2015.
↑ NGC/IC online - result for NGC 1647
↑ Zdanavičius, J.; Straižys, V.; Chen, C. W.; Chen, W. P.; Zdanavičius, K.; Kazlauskas, A.; et al. (2005). "Seven-Color Photometry of the Open Cluster NGC 1647 Area". Baltic Astronomy. 14: 179–203.

New General Catalogue 1500 to 1999

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Astronomical catalog List of NGC objects

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