HD 164427

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HD 164427
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Pavo
Right ascension 18h 04m 42.5963s
Declination −59° 12' 34.4690″
Apparent magnitude (V) 6.89
Absolute magnitude (V) 3.93
Distance 127.6 ly
(39.12 pc)
Spectral type G0+V
Other designations
CD-59 6780, HIP 88531, Gliese 700, SAO 245217

164427 is a star in Pavo with a brown dwarf companion discovered in 2001 taking place in Australia.

HD 164427 b[edit]

HD 164427 b
Exoplanet List of exoplanets
Orbital elements
Semi-major axis (a) 0.46 AU
Eccentricity (e) 0.55
Orbital period (P) 108.55 d
Argument of
(ω) 55.2°
Time of periastron (T0) 2,451,189.3 JD
Semi-amplitude (K) 1398.5 m/s
Physical characteristics
Mass (m) >46 MJ
Radius (r) >1.4 RJ
Discovery information
Discovery date 2001
Discoverer(s) Tinney et al.
Discovery method Doppler Spectroscopy
Discovery site Australia
Discovery status Published

HD 164427 b is a brown dwarf with a minimum mass of 46 times that of Jupiter. It orbits at nearly half an astronomical unit or Earth-to-Sun distance away from its star (HD 164427). The angular separation between a brown dwarf and a yellow dwarf as viewed from Earth is 11.76 Milliarcseconds. It takes 108.55 Earth days to orbit eccentrically around HD 164427. It has a very high semi-amplitude of almost 1400 m/s, because this is a very massive object which exerts strong gravitational pull on its tugging star.[1]


External links[edit]