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β Serpentis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Serpens
Right ascension 15h 46m 11.3s
Declination +15° 25' 19"
Apparent magnitude (V) +3.65
Distance 153 ± 6 ly
(47 ± 2 pc)
Spectral type A3V
Other designations
Chow, 28 Serpentis,
HR 5867, HD 141003,
SAO 101725, HIP 77233,
ADS 9778, CCDM 15461+1525

Beta Serpentis (β Ser / β Serpentis) is a star system in the constellation Serpens, in its head (Serpens Caput). It has the traditional name Chow, from the Chinese 周 "Zhōu (Dynasty)". Beta Serpentis is approximately 153 light years from Earth and is a member of the Ursa Major Moving Group.

The primary component, Beta Serpentis A, is a white A-type main sequence dwarf with an apparent magnitude of +3.65. It has two companions, the magnitude +9.9 B, 31 arcseconds distant, and the magnitude +10.7 C, 201 arcseconds away.


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