HD 131664

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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
Exoplanet Archive 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] Follow-up studies with the Hipparcos satellite adjusted the predicted mass of the companion to 23 times that of Jupiter (minimum of 18 and maximum of 49 Jovian masses).[2]


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

See also[edit]

References[edit]

  1. ^ a b Moutou, C.; 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". Astronomy and Astrophysics 496 (2): 513–519. arXiv:0810.4662. Bibcode:2009A&A...496..513M. doi:10.1051/0004-6361:200810941. 
  2. ^ Reffert, S.; Quirrenbach, A. (2011). "Mass constraints on substellar companion candidates from the re-reduced Hipparcos intermediate astrometric data: nine confirmed planets and two confirmed brown dwarfs". Astronomy & Astrophysics 527. id.A140. arXiv:1101.2227. Bibcode:2011A&A...527A.140R. doi:10.1051/0004-6361/201015861.