65 Aurigae

65 Aurigae
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 07h 22m 02.61744s[1]
Declination +36° 45′ 38.0957″[1]
Apparent magnitude (V) 5.12[2]
Characteristics
Spectral type K0 III[3]
B−V color index 1.082±0.005[2]
Astrometry
Radial velocity (Rv)21.81±0.16[2] km/s
Proper motion (μ) RA: −96.915[1] mas/yr
Dec.: −22.436[1] mas/yr
Parallax (π)12.9673 ± 0.1294 mas[1]
Distance252 ± 3 ly
(77.1 ± 0.8 pc)
Absolute magnitude (MV)0.82[2]
Details
65 Aur A
Mass1.34[4] M☉
Radius13.02+0.47
−2.57[1] R☉
Luminosity69.6±0.9[1] L☉
Surface gravity (log g)2.72[3] cgs
Temperature4,575±17[4] K
Metallicity [Fe/H]−0.35±0.04[2] dex
Rotational velocity (v sin i)0.0[5] km/s
Age3.31[4] Gyr
Other designations
65 Aur, BD+37°1707, FK5 2568, HD 57264, HIP 35710, HR 2793, SAO 60010[6]
Database references
SIMBADdata

65 Aurigae is a binary star[7] system located 252 light years away from the Sun in the northern constellation of Auriga. It is visible to the naked eye as a faint, orange hued star with an apparent visual magnitude of 5.12.[2] The primary, designated component A, is an aging giant star with a stellar classification of K0 III.[3] It is 3.31[4] billion years old and has expanded to 13 times the Sun's radius after exhausting the hydrogen at its core.[1] Its companion, component B, is a magnitude 11.7 star located at an angular separation of 11.4″ from the primary, as of 2008.[7] The pair are moving further from the Earth with a heliocentric radial velocity of 22 km/s.[2]

It was also known to be part of a much bigger constellation named Telescopium Herschelii before it was unrecognized by the International Astronomical Union (IAU).

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Cenarro2007 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference luck2015 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Massarotti2008 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. ^ a b Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).