HD 114762
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Coma Berenices |
| Right ascension | 13h 12m 19.7427s |
| Declination | +17° 31′ 01.643″ |
| Apparent magnitude (V) | 7.30 |
| Characteristics | |
| A | |
| Evolutionary stage | Main sequence |
| Spectral type | F9V |
| U−B color index | -0.05 |
| B−V color index | 0.54 |
| V−R color index | 0.29 |
| R−I color index | 0.20 |
| J−H color index | 0.25 |
| J−K color index | 0.33 |
| B | |
| Evolutionary stage | Main sequence |
| Spectral type | M6?V |
| J−K color index | 0.70 |
| Astrometry | |
| Radial velocity (Rv) | 51.03±0.14 km/s |
| Proper motion (μ) | RA: −582.88±0.49 mas/yr Dec.: −2.18±0.42 mas/yr |
| Parallax (π) | 25.87±0.76 mas |
| Distance | 132.3 ly (40.6 pc) |
| Details | |
| Mass | 0.84 M☉ |
| Radius | 1.24±0.1 R☉ |
| Temperature | 5934.0±80.0 K |
| Metallicity [Fe/H] | −0.71±0.08 dex |
| Age | 11.8±3.9 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| ARICNS | data |
| Extrasolar Planets Encyclopaedia | data |
HD 114762 is a binary star[1] system approximately 132 light-years (40.6 pc) away in the constellation Coma Berenices. It consists of a yellow-white F-type main-sequence star (HD 114762) and a red or brown dwarf companion (HD 114762 B) approximately 130 AU distant.[1] Both are low-metal subdwarfs. A telescope or strong binoculars are needed to view the primary. HD 114762 had been used by scientists as a "standard star", one whose radial velocity is well established, but with the discovery of exoplanet HD 114762 b its usefulness as a standard has been called into question.[2]
Planetary system
In 1989, a substellar object, HD 114762 b, was found orbiting HD 114762 by Latham, et al., using Doppler spectroscopy,[3] but its existence was not confirmed until 1991 by Cochran, et al.[4] By 2012, its status as an exoplanet was confirmed.[5][6] It has a mass of at least 11 MJ, though this will be refined as its inclination is determined. Its orbital distance and revolution is similar to that of Mercury, though it has twice the eccentricity.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥11.069±0.063[8] MJ | 0.353±0.001 | 83.9151±0.0030 | 0.3354±0.0048 | — | — |
References
- 1 2 Patience, J.; White, R. J.; Ghez, A. M.; McCabe, C.; McLean, I. S.; et al. (December 2002). "Stellar Companions to Stars with Planets". The Astrophysical Journal 581 (1): 654–665. arXiv:astro-ph/0207538. Bibcode:2002ApJ...581..654P. doi:10.1086/342982.
- ↑ Maugh II, Thomas H. (4 August 1988). "Other Planets, Other Suns: Astronomers Say Star's Wobble Tells a Story". Los Angeles Times. Retrieved 7 September 2014.
- ↑ Latham, David W.; Mazeh, Tsevi; Stefanik, Robert P.; Mayor, Michel; Burki, Gilbert (May 1989). "The unseen companion of HD114762 - A probable brown dwarf". Nature 339 (6219): 38–40. Bibcode:1989Natur.339...38L. doi:10.1038/339038a0.
- 1 2 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.
- ↑ Kane, Stephen R.; Gelino, Dawn M. (July 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.
- ↑ "HD 114762b -- Extra-solar Confirmed Planet". SIMBAD. Retrieved 7 September 2014.
- ↑ Kane, Stephen R.; Henry, Gregory W.; Dragomir, Diana; Fischer, Debra A.; Howard, Andrew W.; et al. (July 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.
- ↑ Wang, Xuesong Sharon; Wright, Jason T.; Cochran, William; Kane, Stephen R.; Henry, Gregory W.; et al. (December 2012). "The Discovery of HD 37605c and a Dispositive Null Detection of Transits of HD 37605b". The Astrophysical Journal 761 (1). 46. arXiv:1210.6985. Bibcode:2012ApJ...761...46W. doi:10.1088/0004-637X/761/1/46.
Coordinates: 
13h 12m 19.7427s, +17° 31′ 01.643″
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