HD 106252
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 12h 13m 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 | |
| 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° |
— |
References
[edit]- ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
- ^ a b c d e f Fischer, Debra A.; et al. (2002). "Planetary Companions to HD 136118, HD 50554, and HD 106252". Publications of the Astronomical Society of the Pacific. 114 (795): 529–535. Bibcode:2002PASP..114..529F. doi:10.1086/341677.
- ^ a b c d e f g h Perrier, C.; et al. (2003). "The ELODIE survey for northern extra-solar planets. I. Six new extra-solar planet candidates". Astronomy and Astrophysics. 410 (3): 1039–1049. arXiv:astro-ph/0308281. Bibcode:2003A&A...410.1039P. doi:10.1051/0004-6361:20031340. S2CID 6946291.
- ^ a b Nidever, David L.; Marcy, Geoffrey W.; Butler, R. Paul; Fischer, Debra A.; Vogt, Steven S.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2002). "Radial Velocities for 889 Late-Type Stars". The Astrophysical Journal Supplement Series. 141 (2): 503–522. arXiv:astro-ph/0112477. Bibcode:2002ApJS..141..503N. doi:10.1086/340570. S2CID 51814894.
- ^ a b c d e f g h i Li, Yiting; et al. (2021). "Precise Masses and Orbits for Nine Radial-velocity Exoplanets". The Astronomical Journal. 162 (6): 266. arXiv:2109.10422. Bibcode:2021AJ....162..266L. doi:10.3847/1538-3881/ac27ab. S2CID 237592581.
- ^ "HD 106252". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-04-12.
- ^ a b Reffert, S.; Quirrenbach, A. (March 2011). "Mass constraints on substellar companion candidates from the re-reduced Hipparcos intermediate astrometric data: nine confirmed planets and two confirmed brown dwarfs". Astronomy & Astrophysics. 527: 22. arXiv:1101.2227. Bibcode:2011A&A...527A.140R. doi:10.1051/0004-6361/201015861. S2CID 54986291. A140.
- ^ "Exoplanets: The Hunt Continues!" (Press release). Garching, Germany: European Southern Observatory. April 4, 2001. Retrieved December 27, 2012.
