Nu2 Arae
- For other star systems with this Bayer designation, see Nu Arae.
| |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 51m 11.04615s[1] |
| Declination | –53° 07′ 48.9721″[1] |
| Apparent magnitude (V) | 6.10[2] |
| Characteristics | |
| Spectral type | B9.5 III-IV[3] |
| B−V color index | +0.01[2] |
| Astrometry | |
| Radial velocity (Rv) | +18.8 ± 1.2[4] km/s |
| Proper motion (μ) | RA: +15.79[1] mas/yr Dec.: +0.08[1] mas/yr |
| Parallax (π) | 6.41 ± 0.43[1] mas |
| Distance | 510 ± 30 ly (160 ± 10 pc) |
| Other designations | |
Nu2 Arae (ν2 Arae, ν2 Ara) is the Bayer designation for a star in the southern constellation of Ara. It is approximately 510 light-years (160 parsecs) from the Earth and is faintly visible to the naked eye with an apparent visual magnitude of 6.10.[2] The stellar classification of B9.5 III-IV[3] shows this to be a B-type star with a spectrum that displays features part way between the subgiant and giant star stages.
The star is sometimes referred as Upsilon2 Arae (υ2 Arae).[6]
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 Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa 27: 11, Bibcode:1968MNSSA..27...11C.
- 1 2 Houk, Nancy; Cowley, A. P. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H.
- ↑ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters 32 (11): 759–771, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065.
- ↑ "HR 6632 -- Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-14
- ↑ Note for HR 6632
External links
- Aladin previewer: Image of HD 161917
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