| 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−Vcolor 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] |
| Distance | 252 ± 3 ly (77.1 ± 0.8 pc) |
| Absolute magnitude (MV) | 0.82[2] |
| Details | |
| 65 Aur A | |
| Mass | 1.34[4] M☉ |
| Radius | 13.02+0.47 −2.57[1] R☉ |
| Luminosity | 69.6±0.9[1] L☉ |
| Surface gravity (log g) | 2.72[3] cgs |
| Temperature | 4,575±17[4] K |
| Metallicity [Fe/H] | −0.35±0.04[2] dex |
| Rotational velocity (v sin i) | 0.0[5] km/s |
| Age | 3.31[4] Gyr |
| Other designations | |
| 65 Aur,BD+37°1707,FK5 2568,HD 57264,HIP 35710,HR 2793,SAO 60010[6] | |
| Database references | |
| SIMBAD | data |
65 Aurigae is abinary star[7] system located 252 light years away from the Sun in the northernconstellation ofAuriga. It is visible to the naked eye as a faint, orange hued star with anapparent visual magnitude of 5.12.[2] The primary, designated component A, is an aginggiant star with astellar classification of K0 III.[3] It is 3.31[4] billion years old and has expanded to 13 times theSun's radius after exhausting the hydrogen at itscore.[1] Its companion, component B, is a magnitude 11.7 star located at anangular separation of11.4″ from the primary, as of 2008.[7] The pair are moving further from the Earth with a heliocentricradial velocity of 22 km/s.[2]
It was also known to be part of a much bigger constellation namedTelescopium Herschelii before it was unrecognized by theInternational Astronomical Union (IAU).
