Chi Piscium

Chi Piscium
Location of χ Piscium (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pisces
Right ascension 01h 11m 27.21877s[1]
Declination +21° 02′ 04.7406″[1]
Apparent magnitude (V) +4.64[2]
Characteristics
Spectral type G8.5 III[3]
U−B color index +0.83[2]
B−V color index +1.02[2]
Astrometry
Radial velocity (Rv)+15.04±0.21[4] km/s
Proper motion (μ) RA: +39.32[1] mas/yr
Dec.: −10.48[1] mas/yr
Parallax (π)8.50 ± 0.21 mas[1]
Distance384 ± 9 ly
(118 ± 3 pc)
Absolute magnitude (MV)−1.13[5]
Details[6]
Mass3.17±0.23 M☉
Radius20.65±0.57 R☉
Luminosity209.2±10.5 L☉
Surface gravity (log g)2.33±0.05 cgs
Temperature4,835±28 K
Metallicity [Fe/H]−0.15±0.10 dex
Rotational velocity (v sin i)10[7] km/s
Age380±100 Myr
Other designations
χ Psc, 84 Piscium, BD+20° 172, FK5 1032, HD 7087, HIP 5571, HR 351, SAO 74544[8]
Database references
SIMBADdata

Chi Piscium (χ Piscium) is a solitary,[9] orange-hued star in the zodiac constellation of Pisces. It can be seen with the naked eye, having an apparent visual magnitude of +4.64.[2] Based upon an annual parallax shift of 8.50 mas as seen from Earth,[1] it is located about 384 light years from the Sun.

This is an evolved G-type giant star with a stellar classification of G8.5 III.[3] There is a 94%[6] chance that it is on the horizontal branch and is a red clump star,[10] which means it is generating energy through helium fusion at its core. Chi Piscium is estimated to have 3.17 times the mass of the Sun, nearly 21 times the solar radius, and shines with 209 times the Sun's luminosity. It is around 380 million years old.[6]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Argue1966 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Takeda2008 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Reffert2015 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Bernacca1970 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Valentini2010 was invoked but never defined (see the help page).