HD 47186

HD 47186
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Canis Major
Right ascension 06h 36m 08.788s[1]
Declination −27° 37′ 20.27″[1]
Apparent magnitude (V) 7.63[2]
Characteristics
Evolutionary stage main sequence
Spectral type G6V[3]
B−V color index 0.714±0.002[2]
Astrometry
Radial velocity (Rv)4.238±0.0003[4] km/s
Proper motion (μ) RA: 21.582 mas/yr[1]
Dec.: −262.843 mas/yr[1]
Parallax (π)26.7476 ± 0.0217 mas[1]
Distance121.94 ± 0.10 ly
(37.39 ± 0.03 pc)
Absolute magnitude (MV)4.64[2]
Details
Mass1.05±0.01[5] M☉
Radius1.12±0.01[5] R☉
Luminosity1.219±0.005[5] L☉
Surface gravity (log g)4.35±0.01[5] cgs
Temperature5,736±21[5] K
Metallicity [Fe/H]0.23[6] dex
Rotational velocity (v sin i)1.953[6] km/s
Age5.5±0.6[5] Gyr
Other designations
CD−27° 3124, HD 47186, HIP 31540, SAO 172008, LTT 2597, NLTT 16742[7]
Database references
SIMBADdata
Exoplanet Archivedata

HD 47186 is a star with a pair of orbiting exoplanets in the southern constellation of Canis Major. The system is located at a distance of 122 light years from the Sun based on parallax measurements, and is drifting further away with a radial velocity of 4.2 km/s.[4] Although it has an absolute magnitude of 4.64,[2] at the distance of this system the apparent visual magnitude is 7.63;[2] too faint to be seen with the naked eye. It has a high proper motion, traversing the celestial sphere at an angular rate of 0.272″·yr−1.[8]

The spectrum of HD 47186 matches a G-type main-sequence star with a stellar classification of G6V.[3] It is an estimated 5.5[5] billion years old and is spinning with a projected rotational velocity of 2 km/s.[6] The star has 5% greater mass and a 12% larger girth compared to the Sun.[5] The abundance of iron, a measure of the star's metallicity, is 1.7 times more than the Sun, making it metal-rich.[6] HD 47186 is radiating 1.2 times the luminosity of the Sun from its photosphere at an effective temperature of 5,736 K.[5]

  1. ^ a b c d Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray_et_al_2006 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Soubiran_et_al_2018 was invoked but never defined (see the help page).
  5. ^ a b c d e f g h i Cite error: The named reference Bonfanti2015 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Costa_Silva_et_al_2020 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 Wroblewski_Torres_1998 was invoked but never defined (see the help page).