89 Virginis

89 Virginis
Observation data
Epoch J2000      Equinox J2000
Constellation Virgo
Right ascension 13h 49m 52.28332s[1]
Declination −18° 08′ 03.0046″[1]
Apparent magnitude (V) 4.959[2]
Characteristics
Spectral type K0III[3]
U−B color index +0.86[4]
B−V color index +1.06[4]
Astrometry
Radial velocity (Rv)-39.52 ± 0.25[5] km/s
Proper motion (μ) RA: -99.65[1] mas/yr
Dec.: -37.74[1] mas/yr
Parallax (π)13.35 ± 0.33[1] mas
Distance244 ± 6 ly
(75 ± 2 pc)
Absolute magnitude (MV)0.618[6]
Details
Mass1.70[7] M☉
Radius12[5] R☉
Luminosity69[7] L☉
Surface gravity (log g)2.6[5] cgs
Temperature4706 ± 13[7] K
Metallicity [Fe/H]-0.03[5] dex
Age3.40[7] Gyr
Other designations
BD−17° 3937, GJ 9460, HD 120452, HIP 67494, HR 5196, SAO 158186
Database references
SIMBADdata

89 Virginis (89 Vir) is a star in the constellation Virgo. Its apparent magnitude is 4.959.[2] This is an evolved giant star with a stellar classification of K0 III.[3] It is a red clump star, which indicates it is generating energy through helium fusion at its core.[6]

References

  1. 1 2 3 4 5 van Leeuwen, F.; et al. (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 Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
  3. 1 2 Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey. 5: 0. Bibcode:1999MSS...C05....0H.
  4. 1 2 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. Bibcode:1986EgUBV........0M.
  5. 1 2 3 4 Massarotti, Alessandro; Latham, David W.; Stefanik, Robert P.; Fogel, Jeffrey (2008). "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity". The Astronomical Journal. 135: 209. Bibcode:2008AJ....135..209M. doi:10.1088/0004-6256/135/1/209.
  6. 1 2 Liu, Y. J.; et al. (2007), "The abundances of nearby red clump giants", Monthly Notices of the Royal Astronomical Society, 382 (2): 553–66, Bibcode:2007MNRAS.382..553L, doi:10.1111/j.1365-2966.2007.11852.x.
  7. 1 2 3 4 Luck, R. Earle (2015). "Abundances in the Local Region. I. G and K Giants". The Astronomical Journal. 150 (3): 88. arXiv:1507.01466. Bibcode:2015AJ....150...88L. doi:10.1088/0004-6256/150/3/88.


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