HD 114762 b

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HD 114762 b[1]
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
(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

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, 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

  1. ^ 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. 
  2. ^ 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. 
  3. ^ 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. 
  4. ^ 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: Sky map 13h 12m 19.7427s, +17° 31′ 01.643″

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