Lambda Aurigae

λ Aurigae
Location of λ Aurigae (circled)
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]
Distance40.7 ± 0.1 ly
(12.48 ± 0.03 pc)
Absolute magnitude (MV)4.20[5]
Details
Mass1.081+0.054
−0.029[6] M☉
Radius1.331±0.021[3] R☉
Luminosity1.732±0.022[3] L☉
Surface gravity (log g)4.02[7] cgs
Temperature5,890±4.3[8] K
Metallicity [Fe/H]+0.12[9] dex
Rotational velocity (v sin i)2[10] km/s
Age4,[9] 5.0–7.9[11] Gyr
Other designations
λ Aur, 15 Aurigae, BD+39° 1248, FK5 1145, GJ 197, HD 34411, HIP 24813, HR 1729, SAO 40233, LFT 403, LHS 1753, LTT 11625[12]
Database references
SIMBADdata
ARICNSdata

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]

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  2. ^ a b c d Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference apj746_1_101 was invoked but never defined (see the help page).
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  9. ^ a b c Cite error: The named reference mnras397_2_757 was invoked but never defined (see the help page).
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  15. ^ Cite error: The named reference Bailer_et_al_2018 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Lepine2005 was invoked but never defined (see the help page).