HD 106315

HD 106315
Observation data
Epoch J2000      Equinox J2000
Constellation Virgo
Right ascension 12h 13m 53.3962s[1]
Declination −00° 23′ 36.5534″[1]
Apparent magnitude (V) 8.951[2]
Characteristics
Evolutionary stage Main sequence
Spectral type F5V[3]
B−V color index 0.45[2]
Astrometry
Radial velocity (Rv)−3.2±0.3[1] km/s
Proper motion (μ) RA: −2.36±0.03 mas/yr[1]
Dec.: 11.943±0.019 mas/yr[1]
Parallax (π)9.1725 ± 0.0221 mas[1]
Distance355.6 ± 0.9 ly
(109.0 ± 0.3 pc)
Details
Mass1.105+0.028
−0.036
[4] M
Radius1.286+0.049
−0.040
[4] R
Luminosity2.432+0.057
−0.234
[4] L
Surface gravity (log g)4.261+0.027
−0.024
[4] cgs
Temperature6,300±37[4] K
Metallicity [Fe/H]−0.268+0.060
−0.071
[4] dex
Rotation4.78±0.15[5]
Rotational velocity (v sin i)12.9±0.4[4] km/s
Age3.987+0.802
−0.516
[4] Gyr
Other designations
BD+00 2910, HD 106316, TYC 4940-868-1, GSC 04940-00868, 2MASS J12135339-0023365, K2-109, Gaia DR3 3698307419878650240[6]
Database references
SIMBADdata

HD 106315, or K2-109, is a single star with a pair of close-orbiting exoplanets, located in the constellation of Virgo. Based on parallax measurements, this system lies at a distance of 356 light years from the Sun.[1] At that range, the star is too faint to be seen with the naked eye, as it has an apparent visual magnitude of 8.95.[2] But it is slowly drifting closer with a radial velocity of −3 km/s.[1] As of 2020, multiplicity surveys have not detected any stellar companions to HD 106315.[5]

The spectrum of HD 106315 presents as an ordinary F-type main-sequence star with a stellar classification of F5V,[3] indicating it is generating energy through hydrogen fusion at its core. It is estimated to be roughly four[4] billion years old but is spinning quickly with a rotation period of 5 days. The star is relatively metal-poor, having 60% of solar concentration of iron. It has only a low level of magnetic activity in its chromosphere, showing a minimal level of star spot coverage.[5] The star has 11% more mass and a 29% larger radius than the Sun. It is radiating 2.4 times the luminosity of the Sun from its photosphere at an effective temperature of 6,300 K.[4]

  1. ^ a b c d e f g Cite error: The named reference DR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference crossfield2017 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk_Swift_1999 was invoked but never defined (see the help page).
  4. ^ a b c d e f g h i j Cite error: The named reference Rodriguez2017 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Kosiarek2020 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).