HD 114762

HD 114762
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Coma Berenices
Right ascension	13h 12m 19.7428s[1]
Declination	+17° 31′ 01.654″[1]
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: −582.611±0.041[1] mas/yr ; Dec.: −0.520±0.039[1] mas/yr
Parallax (π)	25.88 ± 0.46[1] mas
Distance	126 ± 2 ly ; (38.6 ± 0.7 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
	BD+18°2700, HIP 64426, SAO 100458, 2MASS J13121982+1731016
Database references
SIMBAD	data
Exoplanet Archive	data
ARICNS	data
Extrasolar Planets; Encyclopaedia	data

HD 114762 is a binary star^[2] system approximately 126 light-years (38.6 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.^[2] 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.^[3]

Planetary system

In 1989, a substellar object, HD 114762 b, was found orbiting HD 114762 by Latham, et al., using Doppler spectroscopy,^[4] but its existence was not confirmed until 1991 by Cochran, et al.^[5] By 2012, its status as an exoplanet was confirmed.^[6]^[7] It has a mass of at least 11 M_J, 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.^[5]

The HD 114762 planetary system^[8]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥7001110690000000000♠11.069±0.063^[9] M_J	6999353000000000000♠0.353±0.001	7001839151000000000♠83.9151±0.0030	6999335400000000000♠0.3354±0.0048	—	—

References

1 2 3 4 5 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.
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. (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.; 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.
↑ 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: 13^h 12^m 19.7427^s, +17° 31′ 01.643″

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[Gaia2016-1] 1 2 3 4 5 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.

[Patience2002-2] 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.

[latimes19880804-3] 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.

[Latham1989-4] 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.

[Cochran1991-5] 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.

[Kane2012-6] 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.

[simbad-7] "HD 114762b -- Extra-solar Confirmed Planet". SIMBAD. Retrieved 7 September 2014.

[Kane2011-8] 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.

[Wang2012-9] 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.