49 Aurigae
Star in the constellation Auriga
From Wikipedia, the free encyclopedia
49 Aurigae is a single[8] star located 680[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 visual magnitude of 5.26.[1] The star is moving away from the Earth with a heliocentric radial velocity of +17 km/s, having come to within 149 ly some 5.5 million years ago.[1] It is positioned near the ecliptic and thus is subject to lunar occultations.[9][10]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Auriga[1] |
| Right ascension | 06h 30m 02.97400s[2] |
| Declination | +46° 41′ 08.0041″[2] |
| Apparent magnitude (V) | 5.26[1] |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A0 Vnn[3] |
| B−V color index | −0.008±0.006[1] |
| Astrometry | |
| Radial velocity (Rv) | +17.0±2.8[1] km/s |
| Proper motion (μ) | RA: −7.582[2] mas/yr Dec.: +7.854[2] mas/yr |
| Parallax (π) | 4.7747±0.0978 mas[2] |
| Distance | 680 ± 10 ly (209 ± 4 pc) |
| Absolute magnitude (MV) | −0.01[1] |
| Details | |
| Mass | 2.50[4] M☉ |
| Radius | 4.2[4] R☉ |
| Luminosity | 143[4] L☉ |
| Surface gravity (log g) | 3.60[4] cgs |
| Temperature | 9,782[4] K |
| Rotational velocity (v sin i) | 149[5] km/s |
| Age | 281[6] Myr |
| Other designations | |
| 49 Aur, BD+28°1168, FK5 2504, HD 46553, HIP 31434, HR 2398, SAO 78524[7] | |
| Database references | |
| SIMBAD | data |
This object is an A-type main-sequence star with a stellar classification of A0 Vnn,[3] where the 'n' notation indicates "nebulous" lines due to rapid rotation. It is spinning with a projected rotational velocity of 149 km/s.[5] This star has around 4.2 times the radius of the Sun and is radiating 143 times the Sun's luminosity from its photosphere at an effective temperature of 9,782 K.[4]