BD−10°3166 is a K-type main sequence star approximately 268 light-years away in the constellation of Crater. It was inconspicuous enough not be included in the Draper catalog (HD). The Hipparcos satellite also did not study it, so its true distance is poorly known. The distance measured by the Gaia spacecraft of 268 light years rules out a suggested companion star, LP 731-076, being its true binary star companion.[8][9]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Crater |
| Right ascension | 10h 58m 28.7825s[1] |
| Declination | −10° 46′ 13.396″[1] |
| Apparent magnitude (V) | 10.02[2] |
| Characteristics | |
| Spectral type | K3V[3] |
| B−V color index | 0.85[2] |
| Astrometry | |
| Radial velocity (Rv) | 26.4±2[2] km/s |
| Proper motion (μ) | RA: −183.157±1.580[1] mas/yr Dec.: −8.065±0.553[1] mas/yr |
| Parallax (π) | 12.17 ± 0.45 mas[1] |
| Distance | 268 ± 10 ly (82 ± 3 pc) |
| Absolute magnitude (MV) | +5.4[4] |
| Details | |
| Mass | 0.94[5] M☉ |
| Radius | 0.9[5] R☉ |
| Luminosity | 0.56[5] L☉ |
| Surface gravity (log g) | 4.5[5] cgs |
| Temperature | 5257[5] K |
| Metallicity [Fe/H] | 0.30[6] dex |
| Rotational velocity (v sin i) | 5.4[7] km/s |
| Age | 5.2±3.4[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Stellar characteristics
editThe star is very enriched with metals, being two to three times as metal-rich as the Sun.[6][2] Planets are common around such stars, and BD−10°3166 is not an exception. In 2000, the California and Carnegie Planet Search team discovered an extrasolar planet orbiting the star.[2]
Planetary system
editIn 2000, the California and Carnegie Planet Search discovered a hot Jupiter-type extrasolar planet that has a minimum mass less than half that of Jupiter's, and which takes only 3.49 days to revolve around BD−10°3166.[10]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >0.458 ± 0.039 MJ | 0.0452 ± 0.0026 | 3.48777 ± 0.00011 | 0.019 ± 0.023 | — | 1.03 RJ |
See also
editReferences
edit- ^ a b c d e Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. S2CID 1828208.Gaia Data Release 1 catalog entry
- ^ a b c d e Butler, R. Paul; et al. (2000). "Planetary Companions to the Metal-rich Stars BD -10°3166 and HD 52265". The Astrophysical Journal. 545 (1): 504–511. Bibcode:2000ApJ...545..504B. doi:10.1086/317796.
- ^ a b "BD-10 3166". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-04-02.
- ^ Boro Saikia, S.; et al. (2018), "Chromospheric activity catalogue of 4454 cool stars. Questioning the active branch of stellar activity cycles", Astronomy and Astrophysics, 616: A108, arXiv:1803.11123, Bibcode:2018A&A...616A.108B, doi:10.1051/0004-6361/201629518, S2CID 118915212.
- ^ a b c d e f Bonfanti, A.; Ortolani, S.; Piotto, G.; Nascimbeni, V. (2015). "Revising the ages of planet-hosting stars". Astronomy & Astrophysics. 575: A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951. S2CID 54555839.
- ^ a b Sousa, S. G.; Adibekyan, V.; Delgado-Mena, E.; Santos, N. C.; Andreasen, D. T.; Ferreira, A. C. S.; Tsantaki, M.; Barros, S. C. C.; Demangeon, O.; Israelian, G.; Faria, J. P.; Figueira, P.; Mortier, A.; Brandão, I.; Montalto, M.; Rojas-Ayala, B.; Santerne, A. (2018). "SWEET-Cat updated. New homogenous spectroscopic parameters". Astronomy and Astrophysics. 620: A58. arXiv:1810.08108. Bibcode:2018A&A...620A..58S. doi:10.1051/0004-6361/201833350. S2CID 119374557.
- ^ Luck, R. Earle (January 2017). "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants". The Astronomical Journal. 153 (1): 19. arXiv:1611.02897. Bibcode:2017AJ....153...21L. doi:10.3847/1538-3881/153/1/21. S2CID 119511744. 21.
- ^ Raghavan, Deepak; et al. (2006). "Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems". The Astrophysical Journal. 646 (1): 523–542. arXiv:astro-ph/0603836. Bibcode:2006ApJ...646..523R. doi:10.1086/504823. S2CID 5669768.
- ^ Bartlett, Jennifer L.; Lurie, John C.; Riedel, Adric; Ianna, Philip A.; Jao, Wei-Chun; Henry, Todd J.; Winters, Jennifer G.; Finch, Charlie T.; Subasavage, John P. (2017). "The Solar Neighborhood. XXXX. Parallax Results from the CTIOPI 0.9 m Program: New Young Stars Near the Sun" (PDF). The Astronomical Journal. 154 (4): 151. Bibcode:2017AJ....154..151B. doi:10.3847/1538-3881/aa8457.
- ^ a b Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. S2CID 119067572.
External links
edit- "Notes for star BD-10 3166". Extrasolar Planets Encyclopaedia. Archived from the original on 3 August 2008. Retrieved 2008-08-16.