NGC 1647

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NGC 1647
(palle)NGC 1647.jpg
Observation data (J2000 epoch)
Right ascension04h 45m 55s[1]
Declination±19° 06′ 54″[1]
Distance1,800 ly (on average) (550 ps[2])
Apparent magnitude (V)6.4 [1]
Apparent dimensions (V)45'
Physical characteristics
See also: Open cluster, List of open clusters

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 spectral type B7. Its age is estimated to be 150 million years.[4]


  1. ^ a b c "NGC 1647". SIMBAD. Centre de données astronomiques de Strasbourg. 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. Bibcode:2011RMxAA..47..185G. Retrieved 19 June 2015.
  3. ^ NGC/IC online - result for NGC 1647 Archived 2012-05-20 at the Wayback Machine.
  4. ^ 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. Bibcode:2005BaltA..14..179Z.