HD 162020
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 17h 50m 38.3575s |
| Declination | −40º 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
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor 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[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 1813 m/s. The discovery was announced on April 15, 2000 by the Geneva Extrasolar Planet Search Team.[1]
References
- ↑ 1.0 1.1 "Exoplanets Galore!" (Press release). Garching, Germany: European Southern Observatory. April 15, 2000. Retrieved December 30, 2012.
- Udry et al.; Mayor, M.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Burnet, M. (2002). "The CORALIE survey for southern extra-solar planets VIII. The very low-mass companions of HD 141937, HD 162020, HD 168443, HD 202206: Brown dwarfs or "superplanets"?". Astronomy and Astrophysics 390 (1): 267–279. arXiv:astro-ph/0202458. Bibcode:2002A&A...390..267U. doi:10.1051/0004-6361:20020685.
External links
- "Notes for star HD 162020". The Extrasolar Planets Encyclopaedia. Retrieved December 21, 2007.
- "Notes for planet HD 162020 b". The Extrasolar Planets Encyclopaedia. Retrieved December 21, 2007.
- "HD 162020 – Orange Main Sequence Star". Extrasolar Visions. Retrieved December 21, 2007.
- "HD 162020 B -- Brown dwarf". Extrasolar Visions. Retrieved December 21, 2007.
- "HD 162020 -- Star". SIMBAD. Retrieved December 21, 2007.
- "HD 162020 b -- Extra-solar Planet Candidate". SIMBAD. Retrieved December 21, 2007.
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