Astronomy:110 Virginis
| Observation data 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 |
| Distance | 195 ± 2 ly (59.9 ± 0.8 pc) |
| Details | |
| Mass | 1.67[2] M☉ |
| Radius | 11[4] R☉ |
| Luminosity | 75.9[2] L☉ |
| Surface gravity (log g) | 2.7[5] cgs |
| Temperature | 4,664±19[2] K |
| Metallicity [Fe/H] | −0.3[5] dex |
| Age | 4.52[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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]
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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", Astronomical Journal 150 (3): 88, doi:10.1088/0004-6256/150/3/88, Bibcode: 2015AJ....150...88L.
- ↑ 3.0 3.1 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series 71: 245, doi:10.1086/191373, Bibcode: 1989ApJS...71..245K
- ↑ 4.0 4.1 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, doi:10.1088/0004-6256/135/1/209, Bibcode: 2008AJ....135..209M.
- ↑ 5.0 5.1 Hekker, S.; Meléndez, J. (December 2007), "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters", Astronomy & Astrophysics 475 (3): 1003–1009, doi:10.1051/0004-6361:20078233, Bibcode: 2007A&A...475.1003H.
- ↑ "110 Vir". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=110+Vir.
- ↑ Alves, David R. (August 2000), "K-Band Calibration of the Red Clump Luminosity", The Astrophysical Journal 539 (2): 732–741, doi:10.1086/309278, Bibcode: 2000ApJ...539..732A.
 |  |
