HD 162020

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HD 162020
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Scorpius
Right ascension 17h 50m 38.3575s
Declination −40° 19′ 06.0562″
Apparent magnitude (V) +9.18
Absolute magnitude (V) +6.71
Distance 102.0 ly
(31.26 pc)
Spectral type K2V:
Other designations
CD−40 11894, HIP 87330

HD 162020 is an orange dwarf star in Scorpius constellation with a brown dwarf companion.

HD 162020 b[edit]

HD 162020 b
Exoplanet List of exoplanets
Orbital elements
Semi-major axis (a) 00751 AU
Eccentricity (e) 0.277 ± 0.02
Orbital period (P) 8.428198 ± 0.000056 d
Argument of
(ω) 28.40 ± 0.23°
Time of periastron (T0) 2451990.6768 ± 0.0050 JD
Semi-amplitude (K) 1813 ± 4 m/s
Physical characteristics
Mass (m) >15.0 MJ
Discovery information
Discovery date April 15, 2000[1]
Discoverer(s) Udry et al.
Discovery method Doppler Spectroscopy
Discovery status Published

HD 162020 b is a brown dwarf with mass 15.0 MJ. The mass is minimum since inclination is not known. This planetar orbits very close to the star at a distance of 0.075 AU. Despite of this, it has an eccentric orbit of 27.7%. The distance from the star ranges from 0.054 to 0.096 AU. It has an extremely high semi-amplitude of 1.813 km/s. The discovery was announced on April 15, 2000 by the Geneva Extrasolar Planet Search Team.[1]


  1. ^ a b "Exoplanets Galore!" (Press release). Garching, Germany: European Southern Observatory. April 15, 2000. Retrieved December 30, 2012. 

Further reading[edit]

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