NGC 1647
| NGC 1647 | |
|---|---|
NGC_1647.jpg) | |
| 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 spectral 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.
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