HD 156279

HD 156279
Observation data
Epoch J2000      Equinox J2000
Constellation Draco[1]
Right ascension 17h 12m 23.204816s[2]
Declination +63° 21′ 07.531205″[2]
Apparent magnitude (V) 8.167±0.013[3]
Characteristics
Evolutionary stage main-sequence[4]
Spectral type K0[3] or G6[4]
Apparent magnitude (R) 7.60[1]
Apparent magnitude (G) 7.8657[2]
Apparent magnitude (J) 6.677±0.018[1]
B−V color index 0.801±0.014[1]
Astrometry
Radial velocity (Rv)−20.144±0.161[5] km/s
Proper motion (μ) RA: −1.879±0.024 mas/yr[2]
Dec.: 160.429±0.027 mas/yr[2]
Parallax (π)27.6756 ± 0.0200 mas[2]
Distance117.85 ± 0.09 ly
(36.13 ± 0.03 pc)
Absolute magnitude (MV)5.25[1]
Details
Mass0.93±0.02[6] M☉
Radius0.94±0.02[6] R☉
Luminosity0.70±0.01[6] L☉
Surface gravity (log g)4.45±0.03[6] cgs
Temperature5,449±31[6] K
Metallicity [Fe/H]0.14±0.01[3] dex
Rotational velocity (v sin i)2.51±1[4] km/s
Age7.4±2.2[6] Gyr
Other designations
BD+63 1335, Gaia DR2 1631084478574318976, HD 156279, HIP 84171, SAO 17390, PPM 20265, NLTT 44404, TYC 4202-656-1, 2MASS J17122319+6321074[7]
Database references
SIMBADdata

HD 156279 is a star with a pair of orbiting exoplanets[8] located in the northern constellation of Draco.[1] It has various alternate designations, including HIP 84171 and BD+63 1335. Parallax measurements yield a distance of 118 light years from the Sun,[2] but it is drifting closer with a radial velocity of −20 km/s.[5] Despite an absolute magnitude of 5.25,[1] at that distance the star is too faint to be visible to the naked eye with an apparent visual magnitude of 8.17.[3] It is presumed to be a single star, as in 2019 all imaging surveys have failed to find any stellar companions.[3]

The spectrum of HD 156279 has a stellar classification of G6[4] or K0,[3] depending on the study. Hence it presents as an ordinary main sequence star[4] of the late G-type or early K-type. The star has 93% of the mass of the Sun and 94% of the Sun's radius. HD 156279 is roughly seven[6] billion years old and is spinning with a projected rotational velocity of 2.5 km/s.[4] Based on the abundance of iron, this star is slightly enriched in heavy elements, having 140% of the solar abundance.[3] It is radiating 70%[6] of the luminosity of the Sun from its photosphere at an effective temperature of 5,449 K.[6]

  1. ^ a b c d e f g Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  3. ^ a b c d e f g Cite error: The named reference Fontanive2019 was invoked but never defined (see the help page).
  4. ^ a b c d e f Cite error: The named reference Diaz2011 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Carrera_et_al_2022 was invoked but never defined (see the help page).
  6. ^ a b c d e f g h i Cite error: The named reference Bonfanti_et_al_2016 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. ^ Cite error: The named reference Bryan2016 was invoked but never defined (see the help page).