HD 131664

HD 131664
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Apus
Right ascension 15h 00m 06.0762s
Declination –73° 32′ 07.213″
Apparent magnitude (V) 8.13
Distance 180.8 ± 7.5 ly
(55.43 ± 2.3 pc)
Spectral type G3V
Other designations
CD–73° 1031, HIP 73408
Database references
SIMBAD data
NStED data
Extrasolar Planets
Encyclopaedia		 data

HD 131664 is an 8th magnitude G-type main sequence star located approximately 181 light-years away in the constellation of Apus.

On October 26, 2008, a brown dwarf was discovered along with five other planets (BD-17°63 b, HD 145377 b, HD 153950 b, HD 73267 b, and HD 20868 b). This brown dwarf has mass of at least 18.15 times that of Jupiter and orbits in a long-period, eccentric orbit.[1]

The HD 131664 system[1]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity
b ≥18.15 ± 0.35 MJ 3.17 ± 0.03 1951 ± 41 0.638 ± 0.02

See also

References

  1. ^ a b Moutou et al.; Mayor, M.; Lo Curto, G.; Udry, S.; Bouchy, F.; Benz, W.; Lovis, C.; Naef, D. et al. (2009). "The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, HD 153950" (abstract). Astronomy and Astrophysics 496 (2): 513–519. Bibcode 2009A&A...496..513M. doi:10.1051/0004-6361:200810941. http://www.aanda.org/index.php?option=article&access=doi&doi=10.1051/0004-6361:200810941. (web Preprint)