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Lambda Aurigae
Solar analog star in the constellation Auriga / From Wikipedia, the free encyclopedia
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Lambda Aurigae, Latinized from λ Aurigae, is the Bayer designation for a solar analog[9] star in the northern constellation of Auriga.[13] It is visible to the naked eye with an apparent visual magnitude of 4.71.[2] Based upon parallax measurements, it is approximately 40.7 light-years (12.5 parsecs) distant from the Earth.[14] The star is drifting further away with a high radial velocity of +66.5 km/s,[1] having come to within 24.4 ly (7.5 pc) some 117,300 years ago.[15] It has a high proper motion, traversing the celestial sphere at the rate of 0.844″ per year.[16]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Auriga |
Right ascension | 05h 19m 08.47546s[1] |
Declination | +40° 05′ 56.5896″[1] |
Apparent magnitude (V) | 4.71[2] |
Characteristics | |
Spectral type | G1 V[3] or G1.5 IV-V Fe-1[4] |
U−B color index | +0.13[2] |
B−V color index | +0.62[2] |
R−I color index | 0.32 |
Astrometry | |
Radial velocity (Rv) | +66.53±0.14[1] km/s |
Proper motion (μ) | RA: +520.581[1] mas/yr Dec.: −664.826[1] mas/yr |
Parallax (π) | 80.1054 ± 0.2158 mas[1] |
Distance | 40.7 ± 0.1 ly (12.48 ± 0.03 pc) |
Absolute magnitude (MV) | 4.20[5] |
Details | |
Mass | 1.081+0.054 −0.029[6] M☉ |
Radius | 1.331±0.021[3] R☉ |
Luminosity | 1.732±0.022[3] L☉ |
Surface gravity (log g) | 4.02[7] cgs |
Temperature | 5,890±4.3[8] K |
Metallicity [Fe/H] | +0.12[9] dex |
Rotational velocity (v sin i) | 2[10] km/s |
Age | 4,[9] 5.0–7.9[11] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
ARICNS | data |
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