Eta Volantis

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η Volantis
Volans IAU.svg
Cercle rouge 100%.svg

Location of η Volantis.
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Volans
Right ascension 08h 22m 04.45800s[1]
Declination −73° 23′ 59.9525″[1]
Apparent magnitude (V) 5.28[2]
Characteristics
Spectral type A0/1IV/V[3]
B−V color index +0.01[2]
Astrometry
Radial velocity (Rv) +20[4] km/s
Proper motion (μ) RA: −31.38[1] mas/yr
Dec.: +29.73[1] mas/yr
Parallax (π) 8.56 ± 0.16[1] mas
Distance 381 ± 7 ly
(117 ± 2 pc)
Absolute magnitude (MV) 0.05[5]
Details
Mass 2.73±0.08[5] M
Radius 3.43[5] R
Luminosity 84[6] L
Surface gravity (log g) 3.81±0.04[5] cgs
Temperature 8,663[6] K
Rotational velocity (v sin i) 214[7] km/s
Age 347[5] Myr
Other designations
η Vol, Eta Vol, CPD-72 694, FK5 2653, HD 71576, HIP 41003, HR 3334, SAO 256505[8]
Database references
SIMBAD data

Eta Volantis (η Vol, η Volantis) is a single star[9] in the southern constellation of Volans. It has an apparent visual magnitude of 5.28, which is bright enough to be seen with the naked eye. Based upon parallax measurements, it is approximately 381 light years from Earth.

This is a white A-type star with a blended spectrum that shows aspects of a main sequence star and a subgiant. It has two 12th magnitude optical companions at angular separations of 30.8 and 42.4 arcseconds.

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752Freely accessible, doi:10.1051/0004-6361:20078357. 
  2. ^ a b Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M. 
  3. ^ Houk, Nancy (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. ^ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W. 
  5. ^ a b c d e Gerbaldi, M.; et al. (June 1999), "Search for reference A0 dwarf stars: Masses and luminosities revisited with HIPPARCOS parallaxes", Astronomy and Astrophysics Supplement, 137 (2): 273–292, Bibcode:1999A&AS..137..273G, doi:10.1051/aas:1999248. 
  6. ^ a b McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. Bibcode:2012MNRAS.427..343M. arXiv:1208.2037Freely accessible. doi:10.1111/j.1365-2966.2012.21873.x. 
  7. ^ Royer, F.; et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, Bibcode:2007A&A...463..671R, arXiv:astro-ph/0610785Freely accessible, doi:10.1051/0004-6361:20065224. 
  8. ^ "eps Vol -- Spectroscopic binary", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2016-09-02. 
  9. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878Freely accessible, doi:10.1111/j.1365-2966.2008.13596.x.