HD 162020

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HD 162020
Observation data
Epoch J2000      Equinox J2000
Constellation Scorpius
Right ascension 17h 50m 38.3562s[1]
Declination −40° 19′ 06.066″[1]
Apparent magnitude (V) 9.12[2]
Characteristics
Spectral type K3V[2]
Astrometry
Proper motion (μ) RA: 19.057±0.140[1] mas/yr
Dec.: −26.278±0.101[1] mas/yr
Parallax (π) 32.52 ± 0.24[1] mas
Distance 100.3 ± 0.7 ly
(30.8 ± 0.2 pc)
Details[3]
Mass 0.75 M
Surface gravity (log g) 4.76±0.25 cgs
Temperature 4830±80 K
Metallicity [Fe/H] 0.01±0.11 dex
Rotational velocity (v sin i) 1.9 km/s
Other designations
CD−40 11894, HIP 87330[2]
Database references
SIMBAD data
Exoplanet Archive data

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
periastron
(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[4]
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.[4][3]

References[edit]

External links[edit]