BD−10°3166

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.[4][1] It also has a similar radius to Sirius A

BD−10°3166
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[1] mas
Distance268 ± 10 ly
(82 ± 3 pc)
Details[2]
Mass1.1±0.1 M☉
Radius1.71 R☉
Surface gravity (log g)4.4 cgs
Temperature5400 K
Metallicity [Fe/H]0.50 dex
Other designations
GSC 05503-00946[3]
Database references
SIMBADdata
Exoplanet Archivedata

Stellar characteristics

The star is very enriched with metals, being about three times as metal-rich as the Sun. 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

In 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.[5]

The BD−10°3166 planetary system[5]
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

References
  1. 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
  2. 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.
  3. "BD-10 3166". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-04-02.
  4. 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.
  5. 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.

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