64 Aurigae
Star in the constellation Auriga
From Wikipedia, the free encyclopedia
64 Aurigae is a single[8] star located 312[2] light years away from the Sun in the northern constellation of Auriga.[7] It is visible to the naked eye as a dim, white-hued star with an apparent magnitude of 5.87.[1] The star is moving closer to the Earth with a heliocentric radial velocity of −10, and may come to within 167 light-years in around 5.3 million years.[1] It is a member of the Sirius supercluster.[9]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Auriga[1] |
| Right ascension | 07h 18m 02.21420s[2] |
| Declination | +40° 53′ 00.2248″[2] |
| Apparent magnitude (V) | 5.87[1] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A5 Vn[4] |
| B−V color index | 0.181±0.005 |
| Astrometry | |
| Radial velocity (Rv) | −10.0±4.3[1] km/s |
| Proper motion (μ) | RA: −12.784[2] mas/yr Dec.: +12.065[2] mas/yr |
| Parallax (π) | 10.4466±0.1116 mas[2] |
| Distance | 312 ± 3 ly (96 ± 1 pc) |
| Absolute magnitude (MV) | 1.22[1] |
| Details | |
| Mass | 1.88[5] M☉ |
| Radius | 3.1[5] R☉ |
| Luminosity | 32[5] L☉ |
| Surface gravity (log g) | 3.74[5] cgs |
| Temperature | 7,870[5] K |
| Rotational velocity (v sin i) | 212[3] km/s |
| Age | 291[6] Myr |
| Other designations | |
| 64 Aur, BD+41°1630, FK5 276, HD 56221, HIP 35341, HR 2753, SAO 41679[7] | |
| Database references | |
| SIMBAD | data |
This object is an ordinary A-type main-sequence star with a stellar classification of 5 Vn,[4] where the 'n' notation is used to indicate "nebulous" lines in the spectrum caused by rapid rotation. It is 291[6] million years old with a projected rotational velocity of 212 km/s.[3] The star has 1.9 times the mass of the Sun and is radiating 32 times the Sun's luminosity from its photosphere at an effective temperature of 7,870 K.[5]
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).