Nu2 Arae

For other star systems with this Bayer designation, see Nu Arae.
Nu2 Arae
Diagram showing star positions and boundaries of the Ara constellation and its surroundings


The location of ν2 Arae (circled)

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
Distance510 ± 30 ly
(160 ± 10 pc)
Other designations
CD 53° 7430, HD 161917, HIP 87379, HR 6632, SAO 245072.[5]

Nu2 Arae2 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 Arae2 Arae).[6]

References

  1. 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.
  2. 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.
  3. 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.
  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, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065.
  5. "HR 6632 -- Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-14
  6. Note for HR 6632

External links

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