HD 92788
Star in the constellation Sextans
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HD 92788 is a star in the equatorial constellation of Sextans. It has a yellow hue but is too dim to be visible to the naked eye, having an apparent visual magnitude of 7.31.[3] The star is located at a distance of 113 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −4.5 km/s.[5] Two planets have been found in orbit around the star.[6]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Sextans[1] |
| Right ascension | 10h 42m 48.52807s[2] |
| Declination | −02° 11′ 01.5221″[2] |
| Apparent magnitude (V) | 7.31[3] |
| Characteristics | |
| Spectral type | G6V[4] |
| B−V color index | 0.694±0.005[3] |
| Astrometry | |
| Radial velocity (Rv) | −4.455±0.0518[5] km/s |
| Proper motion (μ) | RA: −15.128±0.080[2] mas/yr Dec.: −223.230±0.061[2] mas/yr |
| Parallax (π) | 28.8281±0.0493 mas[2] |
| Distance | 113.1 ± 0.2 ly (34.69 ± 0.06 pc) |
| Absolute magnitude (MV) | 4.56[3] |
| Details | |
| Mass | 1.032[6] M☉ |
| Radius | 1.14±0.01[2] R☉ |
| Luminosity | 1.253±0.003[2] L☉ |
| Surface gravity (log g) | 4.39[6] cgs |
| Temperature | 5,722+11 −22[2] K |
| Metallicity [Fe/H] | 0.22±0.05[7] dex |
| Rotation | 31.7[7] days |
| Age | 7.6±2.4[3] Gyr |
| Other designations | |
| BD−01°2431, HD 92788, HIP 52409, SAO 137743, LTT 3928, 2MASS J10424853-0211011[8] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
This is a G-type main-sequence star with a stellar classification of G6V.[4] It is estimated to be around eight billion years old and is spinning with a rotation period of 31.7 days.[7] The star has a similar mass to the Sun and is slightly larger in radius, with a high metallicity. It is radiating 1.25[2] times the luminosity of the Sun from its photosphere at an effective temperature of 5,722 K.[2]
Planetary system
An extrasolar planet was discovered orbiting this star in 2001 by means of the radial velocity method. Designated component 'b', it is a Super-Jupiter with an orbital period of 0.89 years.[7] The star rotates at an inclination of 8+14
−8 degrees relative to Earth.[9] It is probable that this planet shares that inclination,[10][11] but direct measurements of the orbital inclinations via astrometry are inconsistent with the stellar rotational inclinaion.[12]
A second planetary companion was announced in 2019. Designated 'c', it orbiting with a period of around 27 years and a semimajor axis of 9.4 AU.[13]