70 Virginis
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Virgo |
Right ascension | 13h 28m 25.81s[1] |
Declination | +13° 46′ 43.6″[1] |
Apparent magnitude (V) | +5.00 |
Characteristics | |
Spectral type | G4 V-IV[2] |
U−B color index | 0.26 |
B−V color index | 0.71 |
V−R color index | 0.39 |
R−I color index | 0.36 |
Variable type | none |
Astrometry | |
Radial velocity (Rv) | 5 km/s |
Proper motion (μ) | RA: −236.02 ± 0.24[1] mas/yr Dec.: −575.73 ± 0.19[1] mas/yr |
Parallax (π) | 55.60 ± 0.17[1] mas |
Distance | 58.7 ± 0.2 ly (17.99 ± 0.05 pc) |
Absolute magnitude (MV) | +3.70 ± 0.01 [3] |
Details | |
Mass | 1.12[4] M☉ |
Radius | 1.9 ± 0.1 [5] R☉ |
Luminosity | 2.92 ± 0.03[6] L☉ |
Surface gravity (log g) | 3.58 cgs |
Temperature | 5,406 ± 64[6] K |
Metallicity [Fe/H] | −0.06[6] dex |
Age | 7.9[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
ARICNS | data |
Extrasolar Planets Encyclopaedia | data |
70 Virginis (abbreviated 70 Vir) is the Flamsteed designation of a yellow dwarf star approximately 59 light-years away[1] in the constellation Virgo. It is rather unusually bright for its spectral type and may be just starting to evolve into the subgiant phase.
In 1996, 70 Virginis was discovered to have an extrasolar planet in orbit around it.[7] There is also a dust disc with a maximum temperature of 153 K located at a minimum distance of 3.4 AU from the star.[8]
Planetary system
The discovery of the planet around 70 Virginis was announced on January 17, 1996 at the meeting of the American Astronomical Society in San Antonio, Texas. The planet was detected using radial velocity measurements taken with the C. Donald Shane telescope at Lick Observatory.[9][7]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | ±0.02 >7.40 MJ | ±0.003 0.481 | ±0.0014 116.6926 | ±0.002 0.399 | — | — |
Dust disc | >3.4 AU | — | — |
References
- 1 2 3 4 5 6 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. Vizier catalog entry
- ↑ Strassmeier, K. G.; Ilyin, I.; Weber, M. (2017). "PEPSI deep spectra. II. Gaia benchmark stars and other M-K standards". arXiv:1712.06967 [astro-ph.EP].
- ↑ Holmberg; et al. (2009). "HD 117176". Geneva-Copenhagen Survey of Solar neighbourhood III. Retrieved 2010-02-02.
- ↑ Shaya, Ed J.; Olling, Rob P. (January 2011), "Very Wide Binaries and Other Comoving Stellar Companions: A Bayesian Analysis of the Hipparcos Catalogue", The Astrophysical Journal Supplement, 192 (1): 2, arXiv:1007.0425, Bibcode:2011ApJS..192....2S, doi:10.1088/0067-0049/192/1/2
- ↑ Gerard T. van Belle & Kaspar von Braun (2009). "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars" (abstract). The Astrophysical Journal. 694 (2): 1085–1098. arXiv:0901.1206. Bibcode:2009ApJ...694.1085V. doi:10.1088/0004-637X/694/2/1085. (web Preprint)
- 1 2 3 4 Boyajian, Tabetha S.; et al. (July 2013), "Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations", The Astrophysical Journal, 771 (1): 31, arXiv:1306.2974, Bibcode:2013ApJ...771...40B, doi:10.1088/0004-637X/771/1/40, 40. See Table 3.
- 1 2 Marcy, Geoffrey W.; Butler, R. Paul (1996). "A Planetary Companion to 70 Virginis". The Astrophysical Journal Letters. 464 (1): L147–L151. Bibcode:1996ApJ...464L.147M. doi:10.1086/310096.
- ↑ Trilling, D. E.; et al. (2008). "Debris Disks around Sun-like Stars". The Astrophysical Journal. 674 (2): 1086–1105. arXiv:0710.5498. Bibcode:2008ApJ...674.1086T. doi:10.1086/525514.
- ↑ Sanders, Robert (January 17, 1996). "Discovery of two new planets -- the second and third within the last three months -- proves they aren't rare in our galaxy" (Press release). University of California, Berkeley. Retrieved December 22, 2017.
- ↑ Kane, Stephen R.; et al. (2015). "A Comprehensive Characterization of the 70 Virginis Planetary System". The Astrophysical Journal. 806. 60. arXiv:1504.04066. Bibcode:2015ApJ...806...60K. doi:10.1088/0004-637X/806/1/60.
External links
- Jean Schneider (2011). "Notes for star 70 Vir". Extrasolar Planets Encyclopaedia. Retrieved 10 October 2011.
- SolStation: 70 Virginis
Coordinates: