Nu2 Arae

For other stars with this Bayer designation, see Nu Arae.
Nu2 Arae
Location of ν2 Arae (circled)
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]
Distance570 ± 10 ly
(174 ± 3 pc)
Absolute magnitude (MV)+0.14[5]
Details
Luminosity85[5] L☉
Other designations
ν2 Ara, CD−53° 7430, HD 161917, HIP 87379, HR 6632, SAO 245072[6]
Database references
SIMBADdata

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

  1. ^ 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.
  2. ^ 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.
  3. ^ 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.
  4. ^ 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.
  5. ^ 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.
  6. ^ "HR 6632 -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-14
  7. ^ Note for HR 6632


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