HD 114762 b

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HD 114762 b[1]
Exoplanet List of exoplanets
Parent star
Star HD 114762
Constellation Coma Berenices
Right ascension (α) 13h 12m 19.7428s[2]
Declination (δ) +17° 31′ 01.654″[2]
Apparent magnitude (mV) 7.3
Distance126±2[2] ly
(38.6±0.7[2] pc)
Spectral type F9V
Orbital elements
Semi-major axis(a) 0.353±0.001[3] AU
Eccentricity (e) 0.3354±0.0048[3]
Orbital period(P) 83.9151±0.0030[3] d
Argument of
(ω) 201.28±1.01[3]°
Time of periastron (T0) 2449889.106±0.186[3] JD
Semi-amplitude (K) 612.48±3.52[3] m/s
Physical characteristics
Minimum mass(m sin i)11.069±0.063[4] MJ
Maximum mass(m sin i)63.2[5] MJ
Discovery information
Discovery date 1989
Discoverer(s) David Latham, et al.
Discovery method Doppler spectroscopy
Discovery site  United States
Discovery status Confirmed
Database references
Extrasolar Planets
Exoplanet Archivedata
Open Exoplanet Cataloguedata

HD 114762 b is a massive gaseous[6][7] extrasolar planet,[8] approximately 126 light-years (38.6 pc) away in the constellation of Coma Berenices.[1][6] This optically undetected companion to the late F-type main-sequence star HD 114762 was discovered in 1989 by Latham, et al.,[7] and confirmed in an October 1991 paper by Cochran, et al.[9]

The companion orbits its star every 83.9 days at an approximate distance of 0.35 AU, with an orbital eccentricity of 0.34;[3] for comparison, this orbit is similar to that of Mercury but with twice the eccentricity.[9] Depending on inclination angle, it has a minimum mass of 11.069±0.063  MJ (at 90°)[4] and a maximum mass of approximately 63.2 MJ (at 10°).[5]

HD 114762 b may be the first extrasolar planet ever detected, predating the 1992 pulsar planets found around PSR B1257+12 and main-sequence yellow dwarf 51 Pegasi.[10][11] By 2012, its status as an exoplanet was confirmed.[5][8] At an event celebrating the career of discoverer Dr. David Latham and attended by his colleagues and collaborators, the planet was informally dubbed "Latham's Planet".[12] However, this name has no official standing with the International Astronomical Union.

See also[edit]


  1. ^ a b Butler, R. P.; Wright, J. T.; Marcy, G. W.; Fischer, D. A.; Vogt, S. S.; 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.
  2. ^ a b c d Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512.Gaia Data Release 1 catalog entry
  3. ^ a b c d e f g Kane, Stephen R.; et al. (2011). "Revised Orbit and Transit Exclusion for HD 114762b". The Astrophysical Journal Letters. 735 (2). L41. arXiv:1106.1434. Bibcode:2011ApJ...735L..41K. doi:10.1088/2041-8205/735/2/L41.
  4. ^ a b Wang, Sharon Xuesong; Wright, Jason T.; Cochran, William; Kane, Stephen R.; Henry, Gregory W.; et al. (2012). "The Discovery of HD 37605c and a Dispositive Null Detection of Transits of HD 37605b". The Astrophysical Journal. 761 (1): 46–59. arXiv:1210.6985. Bibcode:2012ApJ...761...46W. doi:10.1088/0004-637X/761/1/46.
  5. ^ a b c Kane, Stephen R.; Gelino, Dawn M. (2012). "Distinguishing between stellar and planetary companions with phase monitoring". Monthly Notices of the Royal Astronomical Society. 424 (1): 779–788. arXiv:1205.5812. Bibcode:2012MNRAS.424..779K. doi:10.1111/j.1365-2966.2012.21265.x.
  6. ^ a b North, Gerald (2003). Astronomy in Depth. New York: Springer. p. 185. ISBN 9781852335809.
  7. ^ a b Latham, David W.; Mazeh, Tsevi; Stefanik, Robert P.; Mayor, Michel; Burki, Gilbert (4 May 1989). "The unseen companion of HD114762: a probable brown dwarf". Nature. 339 (6219): 38–40. Bibcode:1989Natur.339...38L. doi:10.1038/339038a0.
  8. ^ a b "HD 114762b". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 31 August 2014.
  9. ^ a b Cochran, William D.; Hatzes, Artie P.; Hancock, Terry J. (10 October 1991). "Constraints on the Companion Object to HD 114762". The Astrophysical Journal. 380: L35–L38. Bibcode:1991ApJ...380L..35C. doi:10.1086/186167.
  10. ^ Hale, Alan (1995). "On the Nature of the Companion to HD 114762". Publications of the Astronomical Society of the Pacific. The University of Chicago Press. 107 (707): 22–26. Bibcode:1995PASP..107...22H. doi:10.1086/133511. JSTOR 40680489.
  11. ^ Marcy, Geoffrey W.; 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.
  12. ^ Johnson, John (2016). How do you find an Exoplanet?. New Jersey: Princeton University Press. p. 137. ISBN 978-0-691-15681-1.

Coordinates: Sky map 13h 12m 19.7427s, +17° 31′ 01.643″