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 mas[1] |
| 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[edit]
- ^ a b c d e f 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.
- ^ a b c d e f g h i j k l m 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.
- ^ a b 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
- ^ a b 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, S2CID 121883397.
- ^ a b 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.
- ^ "110 Vir". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-02-16.
- ^ 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.
