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.
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:astro-ph/0310729. Bibcode:2004ApJ...610..443K. doi:10.1086/421037.
- Sigma Piscium (HIP 4889)
- (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日