Eta Piscium

Eta Piscium
Diagram showing star positions and boundaries of the Pisces constellation and its surroundings


Location of η Piscium(circled)

Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Pisces
Right ascension 01h 31m 29.0s
Declination +15° 20' 45"
Apparent magnitude (V) +3.62
Distance294 ly
(90 pc)
Spectral typeG7IIIa
Other designations
η Piscium, η Psc, Eta Psc, 99 Piscium, BD+14 231, CCDM J01315+1521AB, FK5 50, GC 1839, HD 9270, HIP 7097, HR 437, IDS 01261+1450, PPM 117418, SAO 92484, WDS J01315+1521AB.

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.

The total luminosity of this star is 316 times that of the Sun while its surface temperature is 4930 kelvins. The star has a radius of 26 ± 2[1] times solar while its mass is 3.5 to 4 solar masses.

Eta Piscium has a faint companion star with a separation of about 1".

Name and etymology

References

  1. 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
  2. Allen, Richard Hinckley, (1963) [1899]. Star Names: Their Lore and Meaning (rep. ed.). New York, NY: Dover Publications Inc. pp. 328–29. ISBN 0-486-21079-0.
  3. (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日

External links

This article is issued from Wikipedia - version of the Thursday, January 14, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.