HD 149989
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara |
| Right ascension | 16h 40m 44.40039s[1] |
| Declination | –51° 28′ 41.7351″[1] |
| Apparent magnitude (V) | 6.30[2] |
| Characteristics | |
| Spectral type | A9 V[3] |
| Variable type | γ Dor[2] |
| Astrometry | |
| Proper motion (μ) | RA: 12.56[1] mas/yr Dec.: 130.30[1] mas/yr |
| Parallax (π) | 20.24 ± 0.42[1] mas |
| Distance | 161 ± 3 ly (49 ± 1 pc) |
| Details | |
| Rotational velocity (v sin i) | 136[4] km/s |
| Other designations | |
HD 149989 is the Henry Draper Catalogue designation for a star in the southern constellation of Ara. This is a variable star of the Gamma Doradus type with a period of 0.42658 days.[2]
References
- 1 2 3 4 5 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752
, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. - 1 2 3 De Cat, P.; et al. (April 2006), "A spectroscopic study of southern (candidate) γ Doradus stars. I. Time series analysis", Astronomy and Astrophysics, 449 (1): 281–292, arXiv:astro-ph/0511207, Bibcode:2006A&A...449..281D, doi:10.1051/0004-6361:20053655
- ↑ Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- ↑ Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224.
- ↑ "V872 Ara -- Variable Star of gamma Dor", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-08-03.
External links
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