Lambda Arietis

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λ Arietis
Observation data
Epoch J2000.0
Constellation Aries
Right ascension 01h 57m 55.7s
Declination +23° 35' 46"
Apparent magnitude (V) +4.79
Distance 133 ± 4 ly
(41 ± 1 pc)
Spectral type F0V
Other designations
9 Arietis, HR 569,
HD 11973, BD+22°288,
HIP 9153, SAO 75051,
GC 2366, ADS 1563,
CCDM 01580+2336

Lambda Arietis (λ Ari / λ Arietis) is a binary star in the constellation Aries. It is approximately 133 light years from Earth.

The primary component, λ Arietis A, is a yellow-white F-type main sequence dwarf with an apparent magnitude of +4.9. Its companion, λ Arietis B, is 37.4 arcseconds away, and has an apparent magnitude of +7.4. The combined apparent magnitude of the system is 4.79.


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