Epoch J2000.0 Equinox J2000.0
|Right ascension||01h 02m 49.09s|
|Declination||+31° 48' 15.6"|
|Apparent magnitude (V)||+5.50|
Sigma Piscium (Sigma Psc, σ Piscium, σ Psc) is a yellow G-type giant with an apparent magnitude of +5.50. It is approximately 414 light years from Earth. It is also a double lined spectroscopic binary system with a orbital period of 81 days.
Sigma Piscium is moving through the Galaxy at a speed of 23.5 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,300 and 29,400 light years from the center of the Galaxy.
Sigma Piscium was a latter designation of 40 Andromedae.
In Chinese, 奎宿 (Kuí Sù), meaning Legs (asterism), refers to an asterism consisting of refers to an asterism consisting of σ Piscium, η Andromedae, 65 Piscium, ζ Andromedae, ε Andromedae, δ Andromedae, π Andromedae, ν Andromedae, μ Andromedae, β Andromedae, τ Piscium, 91 Piscium, υ Piscium, φ Piscium, χ Piscium and ψ1 Piscium. Consequently, σ Piscium itself is known as 奎宿十 (Kuí Sù shí, English: the Tenth Star of Legs.)
- Konacki, Maciej; Lane, Benjamin F. (2004). "The Visual Orbits of the Spectroscopic Binaries HD 6118 and HD 27483 from the Palomar Testbed Interferometer". The Astrophysical Journal. 610 (1): 443–455. arXiv: . Bibcode:2004ApJ...610..443K. doi:10.1086/421037.
- Sigma Piscium (HIP 4889)
- Wagman, M. (August 1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy, Vol.18, NO. 3/AUG, P.209, 1987. 18: 211. Bibcode:1987JHA....18..209W. doi:10.1177/002182868701800305.
- (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日
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