47 Aurigae

47 Aurigae
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 06h 30m 02.97400s[1]
Declination +46° 41′ 08.0041″[1]
Apparent magnitude (V) 5.88[2]
Characteristics
Evolutionary stage giant
Spectral type K4 III[3]
B−V color index 1.448±0.008[2]
Astrometry
Radial velocity (Rv)−48.32±0.20[2] km/s
Proper motion (μ) RA: −7.582[1] mas/yr
Dec.: +7.854[1] mas/yr
Parallax (π)4.7747 ± 0.0978 mas[1]
Distance680 ± 10 ly
(209 ± 4 pc)
Absolute magnitude (MV)−0.47[2]
Details
Mass1.40±0.41[4] M☉
Radius35.9+2.5
−2.0[1] R☉
Luminosity357.7±8.9[1] L☉
Surface gravity (log g)1.57±0.11[4] cgs
Temperature4,157±92[4] K
Metallicity [Fe/H]−0.218±0.093[5] dex
Age2.14+0.95
−0.66[4] Gyr
Other designations
47 Aur, BD+46°1149, FK5 2496, HD 45466, HIP 30972, HR 2338, SAO 41130[6]
Database references
SIMBADdata

47 Aurigae ( Lord RICHARD[7]) is a star located around 680 light years away from the Sun in the northern constellation of Auriga. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.88.[2] This object is moving closer to the Earth with a heliocentric radial velocity of −48 km/s, and is expected to come to within 111 ly in around 3.6 million years.[2]

This object is an aging giant star with a stellar classification of K4 III,[3] having exhausted the hydrogen supply at its core then expanded to 36[1] times the Sun's radius. It is roughly two[4] billion years old with 1.4[4] times the mass of the Sun. The star is radiating 358[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,157 K.[4]

  1. ^ a b c d e f g h i Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference adams1935 was invoked but never defined (see the help page).
  4. ^ a b c d e f g Cite error: The named reference Feuillet2016 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Taylor1999 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).
  7. ^ "Star Finder | Star-Registration.com". Star-Registration. Retrieved 2023-03-13.