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Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Crater
Right ascension 10h 58m 28.7798s
Declination −10° 46′ 13.386″
Apparent magnitude (V) 10.08
Distance 218 ± 32.6 ly
(66.8 ± 10.0 pc)
Spectral type K0V
Other designations
GSC 05503-00946
Database references

BD-10°3166 is a K-type main sequence star approximately 218 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. A recent photometric distance measurement gives an approximate distance of 218 light years. Although the estimate is only crude, it is probably good enough to exclude a suggested companion star, LP 731-076, being its true binary star companion.[1]

Stellar characteristics[edit]

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[2] orbiting the star.

Planetary system[edit]

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.[3]

The BD-10°3166 planetary system[3]
(in order from star)
Mass Semimajor axis
Orbital period
Eccentricity Inclination Radius
b >0.458 ± 0.039 MJ 0.0452 ± 0.0026 3.48777 ± 0.00011 0.019 ± 0.023

See also[edit]


  1. ^ Raghavan; et al. (2006). "Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems". The Astrophysical Journal. 646 (1): 523–542. Bibcode:2006ApJ...646..523R. arXiv:astro-ph/0603836Freely accessible. doi:10.1086/504823. 
  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. ^ a b Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. Bibcode:2006ApJ...646..505B. arXiv:astro-ph/0607493Freely accessible. doi:10.1086/504701. 

External links[edit]

Coordinates: Sky map 10h 58m 28.7798s, −10° 46′ 13.386″