Nu2 Arae
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 51m 11.04526s[1] |
| Declination | –53° 07′ 48.9705″[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: +14.855[1] mas/yr Dec.: +0.548[1] mas/yr |
| Parallax (π) | 5.7499 ± 0.1048 mas[1] |
| Distance | 570 ± 10 ly (174 ± 3 pc) |
| Absolute magnitude (MV) | +0.14[5] |
| Details | |
| Luminosity | 85[5] L☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
Nu2 Arae, Latinized from ν2 Arae, is the Bayer designation for a star in the southern constellation of Ara. It is approximately 570 light-years (170 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).[7]
References
[edit]- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c 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.
- ^ a b Houk, Nancy; Cowley, A. P. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 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, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065, S2CID 119231169.
- ^ a b Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ "HR 6632 -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-14
- ^ Note for HR 6632
External links
[edit]- Aladin previewer: Image of HD 161917
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