NGC 1647

NGC 1647

NGC 1647
Observation data (J2000 epoch)
Constellation Taurus
Right ascension 04h 45m 55s[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. ^ a b c "SIMBAD Astronomical Database". Results for NGC 1647. Retrieved 2015-06-19. 
  2. ^ a b 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. 
  3. ^ NGC/IC online - result for NGC 1647
  4. ^ Zdanavičius, J.; Straižys, V.; Chen, C. W.; Chen, W. P.; Zdanavičius, K.; Kazlauskas, A.; Černis, K.; Philip, A. G. D.; Boyle, R. P.; Tautvaišienė, G. (2005). "Seven-Color Photometry of the Open Cluster NGC 1647 Area". Baltic Astronomy 14: 179–203.