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HD 106252

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]
Distance209.98 ± 0.06 ly
(64.38 ± 0.02 pc)
Absolute magnitude (MV)4.53[2]
Details
Mass1.05±0.02[6] M☉
Radius1.096[3] R☉
Luminosity1.328±0.030[6] L☉
Surface gravity (log g)4.40±0.15[4] cgs
Temperature5,890±50[4] K
Metallicity [Fe/H]−0.06±0.04[6] dex
Rotation22.8 d[3]
Rotational velocity (v sin i)1.74±0.25[4] km/s
Age3.00+0.8
−0.6[6] Gyr
Other designations
BD+10° 2392, HD 106252, HIP 59610, SAO 99998, LTT 13402, NLTT 30020[7]
Database references
SIMBADdata
Exoplanet Archivedata

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]

The HD 106252 planetary system[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° 		—
  1. ^ a b c d Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference Fischer2002 was invoked but never defined (see the help page).
  4. ^ a b c d e f g h Cite error: The named reference Perrier2003 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Nidever_et_al_2002 was invoked but never defined (see the help page).
  6. ^ a b c d e f g h i Cite error: The named reference Li2021 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Reffert_Quirrenbach_2011 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference eso0114 was invoked but never defined (see the help page).

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