Sigma Tauri

σ Tauri

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Taurus
Right ascension	04^h 39^m 09.2^s
Declination	+15° 47' 59"
Apparent magnitude (V)	5.08 + 4.67
Distance	155 ± 5 ly (48 ± 1 pc)
Spectral type	A4m+A5Vn
Other designations
91 Tauri + 92 Tauri, HR 1478 + HR 1479, HD 29479 + HD 29488, BD+15 665 + BD+15 666, HIP 21673 + HIP 21683, SAO 94051 + SAO 94054, GC 5662 + GC 5666, BDS 2293, CCDM 04392+1552.

Sigma Tauri (σ Tau / σ Tauri) is a star system in the constellation Taurus and a member of the Hyades star cluster. It is approximately 155 light years from Earth.

The system is a visual double star, whose components are designated σ¹ Tauri and σ² Tauri.. They are separated by 7.3 arcminutes on the sky. Both stars are white A-type main sequence dwarfs and have apparent magnitudes of +5.08 and +4.67, respectively.

In Chinese astronomy, σ² Tauri is called 附耳, Pinyin: Fùěr, meaning Whisper, because this star is marking itself and stand alone in Whisper asterism, Net mansion (see : Chinese constellation).^[1]

References

• This article made use of the SIMBAD database, operated at CDS, Strasbourg, France

1. (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 23 日