HD 114762 b
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| Exoplanet | List of exoplanets | |
|---|---|---|
| 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 | 132.4 ly (40.6 pc) |
|
| Spectral type | F9V | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.353±0.001[2] AU |
| Eccentricity | (e) | 0.3354±0.0048[2] |
| Orbital period | (P) | 83.9151±0.0030[2] d |
| Argument of periastron |
(ω) | 201.28±1.01[2]° |
| Time of periastron | (T0) | 2449889.106±0.186[2] JD |
| Semi-amplitude | (K) | 612.48±3.52[2] m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 11.069±0.063[3] MJ |
| Maximum mass | (m sin i) | 63.2[4] MJ |
| Discovery information | ||
| Discovery date | 1989 | |
| Discoverer(s) | David Latham, et al. | |
| Discovery method | Doppler spectroscopy | |
| Discovery status | Confirmed | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 114762 b is a massive gaseous[5][6] extrasolar planet,[7] approximately 132 light-years (40.6 pc) away in the constellation of Coma Berenices.[1][5] This optically undetected companion to the late F-type main-sequence star HD 114762 was discovered in 1989 by Latham, et al.,[6] and confirmed in an October 1991 paper by Cochran, et al.[8]
The companion orbits its star every 83.9 days at an approximate distance of 0.35 AU, with an orbital eccentricity of 0.34;[2] for comparison, this orbit is similar to that of Mercury but with twice the eccentricity.[8] Depending on inclination angle, it has a minimum mass of 11.069±0.063 MJ (at 90°)[3] and a maximum mass of approximately 63.2 MJ (at 10°).[4]
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.[9][10] By 2012, its status as an exoplanet was confirmed.[4][7] At an event celebrating the career of discover Dr. David Latham and attended by his colleagues and collaborators, the planet was informally dubbed "Latham's Planet".[11] However, this name has no official standing with the International Astronomical Union.
See also
References
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13h 12m 19.7427s, +17° 31′ 01.643″
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