HD 114762 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 114762 | |
| Constellation | Coma Berenices | |
| Right ascension | (α) | 13h 12m 19.7427s |
| Declination | (δ) | +17° 31′ 01.643″ |
| Apparent magnitude | (mV) | 7.3 |
| Distance | 132.3 ly (40.6 pc) |
|
| Spectral type | F9V | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.363 ± 0.021 AU (54.3 Gm) |
| Periastron | (q) | 0.241 AU (36.1 Gm) |
| Apastron | (Q) | 0.485 AU (72.6 Gm) |
| Eccentricity | (e) | 0.3359 ± 0.0091 |
| Orbital period | (P) | 83.8881 ± 0.0086 d (0.229669 y) |
| Orbital speed | (υ) | 47.2 km/s |
| Argument of periastron |
(ω) | 201.7 ± 1.4° |
| Time of periastron | (T0) | 2,449,805.36 ± 0.34 JD |
| Semi-amplitude | (K) | 615.2 ± 6.7 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 11.02 ± 0.96 MJ |
| Discovery information | ||
| Discovery date | 1989 | |
| Discoverer(s) | Latham et al. | |
| Detection method | Doppler Spectroscopy | |
| Discovery status | Confirmed | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
HD 114762 b is a candidate extrasolar planet, approximately 132 light years away in the constellation of Coma Berenices, and is probably a brown dwarf. This optically undetected companion to the late F-type star HD 114762 was discovered in 1989 by David Latham and others.[2] As of 2006[update], insufficient confirmed measurements exist to determine whether it is a high mass gas giant, with its lowest possible mass being 11 times the mass of Jupiter, brown dwarf, or a red dwarf with its highest mass around 145 times Jupiter. If it does turn out to be an exoplanet it will be the first one ever detected - although not confirmed - predating the 1992 pulsar planets found around PSR B1257+12 and main-sequence yellow dwarf 51 Pegasi.[3][4] It orbits the star around 83.89 days and an orbital eccentricity of 0.34.
[edit] See also
[edit] References
- ^ Butler et al.; Wright, J. T.; Marcy, G. W.; Fischer, D. A.; Vogt, S. S.; Tinney, C. G.; Jones, H. R. A.; Carter, B. D. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode 2006ApJ...646..505B. doi:10.1086/504701. http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html.
- ^ Latham, David W. et al. (1989). "The unseen companion of HD114762 - A probable brown dwarf". Nature 339 (6219): 38–40. Bibcode 1989Natur.339...38L. doi:10.1038/339038a0. http://www.nature.com/nature/journal/v339/n6219/abs/339038a0.html.
- ^ Alan Hale (1995). "On the nature of the companion to HD 114762". Astronomical Society of the Pacific 107: 22–26. Bibcode 1995PASP..107...22H. doi:10.1086/133511.
- ^ Marcy et al.; Butler, R. Paul; Vogt, Steven S.; Fischer, Debra; Liu, Michael C. (1999). "Two New Candidate Planets in Eccentric Orbits". The Astrophysical Journal 520 (1): 239–247. arXiv:astro-ph/9904275. Bibcode 1999ApJ...520..239M. doi:10.1086/307451. http://www.iop.org/EJ/article/0004-637X/520/1/239/39695.html.
Coordinates: 
13h 12m 19.7427s, +17° 31′ 01.643″
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