12h13m29.5093s, +10° 02′ 29.898″| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 12h13m 29.510s[1] |
| Declination | +10° 02′ 29.88″[1] |
| Apparent magnitude (V) | 7.41[2] |
| Characteristics | |
| Spectral type | G0V[3] |
| B−V color index | 0.635±0.007[4] |
| Astrometry | |
| Radial velocity (Rv) | 15.44±0.11[5] km/s |
| Proper motion (μ) | RA: 22.863 mas/yr[1] Dec.: −280.009 mas/yr[1] |
| Parallax (π) | 15.533 ± 0.0048 mas[1] |
| Distance | 209.98 ± 0.06 ly (64.38 ± 0.02 pc) |
| Absolute magnitude (MV) | 4.53[2] |
| Details | |
| Mass | 1.05±0.02[6] M☉ |
| Radius | 1.096[3] R☉ |
| Luminosity | 1.328±0.030[6] L☉ |
| Surface gravity (log g) | 4.40±0.15[4] cgs |
| Temperature | 5,890±50[4] K |
| Metallicity [Fe/H] | −0.06±0.04[6] dex |
| Rotation | 22.8 d[3] |
| Rotational velocity (v sin i) | 1.74±0.25[4] km/s |
| Age | 3.00+0.8 −0.6[6] Gyr |
| Other designations | |
BD+10° 2392, HD 106252, HIP 59610, SAO 99998, LTT 13402, NLTT 30020[7] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 106252 is a star with a brown dwarf[8] companion in the constellation Virgo. An apparent visual magnitude of 7.41[2] means this star is too faint to be visible to the naked eye. It is located at a distance of 210 light years from the Sun based on parallax measurements, and is receding with a radial velocity of 15 km/s.[5]
The stellar classification of HD 106252 is G0V,[3] matching an ordinary G-type main-sequence star. It has 5%[6] more mass than the Sun and 10%[3] greater in girth. This star is about three[6] billion years old with a low level of magnetic activity[4] and is spinning with a projected rotational velocity of 2 km/s.[4] It is radiating 1.3[6] times the luminosity of the Sun from its photosphere at an effective temperature of 5,890 K.[4]
In 2001, a massive sub-stellar companion was announced orbiting the star by the European Southern Observatory.[9][4] The discovery was confirmed by a different team using the Lick Telescope.[3] Astrometric observations from Hipparcos in 2011 suggested that its true mass is likely around 30.6 MJ, in the brown dwarf range.[8] More accurate astrometry from Gaia in 2021 revealed a smaller true mass of 10.0 MJ.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 10.00+0.78 −0.73 MJ |
2.655±0.017 | 4.202+0.011 −0.010 |
0.480±0.010 | 46.0+4.9 −4.1° |
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