Epoch J2000.0 Equinox J2000.0
|Right ascension||01h 31m 29.0s|
|Declination||+15° 20' 45"|
|Apparent magnitude (V)||+3.62|
Eta Piscium (Eta Psc, η Piscium, η Psc) is the brightest star in the constellation Pisces. Eta Piscium is located at a distance of about 294 light years from Earth, and shines at magnitude +3.62. It is of Spectral type G7 III.
Eta Piscium has a faint companion star with a separation of about 1".
Name and etymology
- The star had an obscure Babylonian name Kullat Nūnu−the latter being the Babylonian word for fish and the former "Kullat" referring to either a bucket or the cord that ties the fish together.
- In Chinese, 右更 (Yòu Gèng), meaning Official in Charge of the Pasturing, refers to an asterism consisting of η Piscium, ρ Piscium, π Piscium, ο Piscium and 104 Piscium. Consequently, η Piscium itself is known as 右更二 (Yòu Gèng èr, English: the Second Star of Official in Charge of the Pasturing.)
- Nordgren, Tyler E.; et al. (December 1999), "Stellar Angular Diameters of Late-Type Giants and Supergiants Measured with the Navy Prototype Optical Interferometer", The Astronomical Journal, 118 (6): 3032–3038, Bibcode:1999AJ....118.3032N, doi:10.1086/301114
- Allen, Richard Hinckley, (1963) . Star Names: Their Lore and Meaning (rep. ed.). New York, NY: Dover Publications Inc. pp. 328–29. ISBN 0-486-21079-0.
- (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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