HR 6384
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 14m 13.40898s[1] |
| Declination | –56° 53′ 18.6966″[1] |
| Apparent magnitude (V) | 6.153[2] |
| Characteristics | |
| Spectral type | M1/M2II/III+A[3] |
| U−B color index | +1.340[2] |
| B−V color index | +1.787[2] |
| Variable type | ellipsoidal variable |
| Astrometry | |
| Proper motion (μ) | RA: 4.22[1] mas/yr Dec.: –5.91[1] mas/yr |
| Parallax (π) | 2.54 ± 0.76[1] mas |
| Distance | approx. 1,300 ly (approx. 400 pc) |
| Other designations | |
HR 6384 is a star in the southern constellation of Ara, the Altar. It is a close binary star system that forms an ellipsoidal variable with a period of 80 days and an amplitude variation of 0.08 in magnitude.[5] The system is faintly visible to the naked eye with a combined apparent visual magnitude of 6.153,[2] and it is located at a distance of approximately 1,300 light-years (400 parsecs) from Earth.[1]
References
- 1 2 3 4 5 6 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 4 Walker, W. S. G.; Marino, B. F.; Herdman, G. (August 1985), "Photometry of HR 6384 - an 80 Day Ellipsoidal Binary?", Information Bulletin on Variable Stars 2775: 1, Bibcode:1985IBVS.2775....1W.
- ↑ Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- ↑ "V829 Ara -- Ellipsoidal variable Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-28.
- ↑ Hoffleit, Dorrit (1996), "A Catalogue of Correlations Between Eclipsing Binaries and Other Categories of Double Stars", The Journal of the American Association of Variable Star Observers 24 (2): 105–116, Bibcode:1996JAVSO..24..105H.
External links
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