Lambda Aurigae

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λ Aurigae A
Observation data
Epoch J2000
Constellation
(pronunciation)		 Auriga
Right ascension 05h 19m 08.5s
Declination +40° 05′ 57″
Apparent magnitude (V) 4.69
Characteristics
Spectral type G1.5 IV-VFe-1
U-B color index 0.12
B-V color index 0.63
Variable type ?
Astrometry
Radial velocity (Rv) 66.4 km/s
Proper motion (μ) RA: 519.33 mas/yr
Dec.: -664.74 mas/yr
Parallax (π) 79.08 ± 0.90 mas
Distance 41.2 ± 0.5 ly
(12.6 ± 0.1 pc)
Absolute magnitude (MV) 4.18
Other designations
15 Aurigae, Gl 197, HR 1729, BD +39°1248, HD 34411, LHS 1753, LTT 11625, GCTP 1199.00, SAO 40233, FK5 1145, GC 6494, ADS 3886, BDS 2630, CCDM 05192+4007, HIP 24813.

Lambda Aurigae (λ Aur / λ Aurigae) is a binary star in the constellation Auriga. It is approximately 41.2 light-years from Earth.

The primary component, λ Aurigae A, is a yellow G-type subgiant with an apparent magnitude of +4.69. Its companion, λ Aurigae B, is 29 arcseconds away and has an apparent magnitude of +13.4. The binary star also has two optical companions, the 12th magnitude λ Aurigae C at 42 arcseconds and the magnitude +8.6 λ Aurigae D, 146 arcseconds from the primary.

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