110 Virginis

110 Virginis is a star in the zodiac constellation Virgo, located 195[1] light-years away from the Sun. It is visible to the naked eye as an orange-hued star with an apparent visual magnitude of 4.40.[2] The star is moving closer to the Earth with a heliocentric radial velocity of −16 km/s.[2]

110 Virginis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Virgo
Right ascension 15h 02m 54.03796s[1]
Declination +02 05 28.6944°[1]
Apparent magnitude (V) 4.40[2]
Characteristics
Spectral type K0.5 IIIb Fe–0.5[3]
B−V color index 1.04[2]
Astrometry
Radial velocity (Rv)−15.92[2] km/s
Proper motion (μ) RA: −54.89[1] mas/yr
Dec.: +13.34[1] mas/yr
Parallax (π)16.69 ± 0.21[1] mas
Distance195 ± 2 ly
(59.9 ± 0.8 pc)
Details
Mass1.67[2] M☉
Radius11[4] R☉
Luminosity75.9[2] L☉
Surface gravity (log g)2.7[5] cgs
Temperature4,664±19[2] K
Metallicity [Fe/H]−0.3[5] dex
Age4.52[2] Gyr
Other designations
110 Vir, BD+02°2905, FK5 3190, GC 20237, HD 133165, HIP 73620, HR 5601, SAO 120809[6]
Database references
SIMBADdata

The stellar classification of 110 Virginis is K0.5 IIIb Fe–0.5,[3] indicating that this is an evolved giant star with a mild underabundance of iron in its spectrum. At the age of 4.5[2] billion years old, it belongs to a sub-category of giants called the red clump, which means it is on the horizontal branch and is generating energy through the helium fusion at its core.[7] Compared to the Sun, it has 167%[2] of the mass but has expanded to 11 times the size.[4] The enlarged photosphere has an effective temperature of 4,664 K[2] and is radiating 76[2] times the Sun's luminosity.

References
  1. van Leeuwen, F. (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, S2CID 18759600.
  2. Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", Astronomical Journal, 150 (3), 88, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID 118505114.
  3. Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373
  4. Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity", The Astronomical Journal, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209.
  5. Hekker, S.; Meléndez, J. (December 2007), "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters", Astronomy & Astrophysics, 475 (3): 1003–1009, arXiv:0709.1145, Bibcode:2007A&A...475.1003H, doi:10.1051/0004-6361:20078233, S2CID 10436552.
  6. "110 Vir". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-02-16.
  7. Alves, David R. (August 2000), "K-Band Calibration of the Red Clump Luminosity", The Astrophysical Journal, 539 (2): 732–741, arXiv:astro-ph/0003329, Bibcode:2000ApJ...539..732A, doi:10.1086/309278, S2CID 16673121.
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