Upsilon Piscium

Upsilon Piscium[1]
Diagram showing star positions and boundaries of the Pisces constellation and its surroundings


Location of υ Piscium(circled)

Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Pisces
Right ascension 01h 19m 27.9951s
Declination +27° 15' 50.611"
Apparent magnitude (V) 4.752
Characteristics
Spectral type A3V
U−B color index +0.10
B−V color index +0.03
Astrometry
Radial velocity (Rv)8.0 km/s
Proper motion (μ) RA: 26.21 mas/yr
Dec.: -11.62 mas/yr
Parallax (π)10.49 ± 0.77 mas
Distance310 ± 20 ly
(95 ± 7 pc)
Other designations
υ Piscium, υ Psc, Upsilon Psc, 90 Piscium, BD+26°220, FK5 45, GC 1591, HD 7964, HIP 6193, HR 383, PPM 90681, SAO 74637

Upsilon Piscium (Upsilon Psc, υ Piscium, υ Psc) is a star approximately 310 light years away from Earth, in the constellation Pisces. It is bluish-white star of the spectral type A3V. It has a surface temperature of 7,500 to 11,000 kelvins, and is approximately the same size as our Sun, yet is much hotter and brighter. It has a rotational velocity of 93 kilometers per second at the equator.[2]

Naming

In Chinese, 奎宿 (Kuí Sù), meaning Legs (asterism), refers to an asterism consisting of refers to an asterism consisting of υ Piscium, η Andromedae, 65 Piscium, ζ Andromedae, ε Andromedae, δ Andromedae, π Andromedae, ν Andromedae, μ Andromedae, β Andromedae, σ Piscium, τ Piscium, 91 Piscium, φ Piscium, χ Piscium and ψ¹ Piscium. Consequently, υ Piscium itself is known as 奎宿十三 (Kuí Sù shí sān, English: the Thirteenth Star of Legs.)[3]

References

  1. ↑ "Simbad Query Result". Simbad. Retrieved October 1, 2007.
  2. ↑ "upsilon Piscium". Retrieved October 1, 2007.
  3. ↑ (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日