Gamma Piscium

γ Piscium
Location of γ Piscium (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Pisces
Right ascension 23h 17m 09.937s[1]
Declination +03° 16′ 56.25″[1]
Apparent magnitude (V) 3.699[2]
Characteristics
Evolutionary stage Horizontal branch[3]
Spectral type G8 III[4]
U−B color index +0.572 [2]
B−V color index +0.924[2]
Astrometry
Radial velocity (Rv)−13.6[5] km/s
Proper motion (μ) RA: 759.268 mas/yr[1]
Dec.: 17.568 mas/yr[1]
Parallax (π)24.1958 ± 0.2967 mas[6]
Distance135 ± 2 ly
(41.3 ± 0.5 pc)
Absolute magnitude (MV)0.68±0.08[7]
Details
Mass0.97±0.12[3] M☉
Radius11.28±0.10[4] R☉
Luminosity62.7±3.3[4] L☉
Surface gravity (log g)2.43 ± 0.06[7] cgs
Temperature4833±62[4] K
Metallicity [Fe/H]−0.51[7] dex
Age~12[3] Gyr
Other designations
Gamma Psc, γ Piscium, γ Psc, 6 Piscium, BD+02°4648, FK5 878, GC 32415, HD 219615, HIP 114971, HR 8852, SAO 128085, PPM 173938, 2MASS J23170996+0316563[8]
Database references
SIMBADdata

Gamma Piscium (γ Piscium) is a star approximately 135 light years away from Earth in the zodiac constellation of Pisces. It is a yellow star with a spectral type of G8 III, meaning it has a surface temperature of 4,833 K and is a giant star. It is slightly cooler than the Sun, yet it is 11[4] solar radii in size and shines with the light of 63 Suns.[4] The star is a member of the red clump, which means it is undergoing core helium fusion.[9] At an apparent magnitude of 3.7,[2] it is the second brightest star in the constellation Pisces, between Eta and Alpha.

Gamma Piscium moves across the sky at three-quarters of an arcsecond per year, which at 135 light years corresponds to 153 kilometers per second.[citation needed] This suggests it is a visitor from another part of the Milky Way Galaxy; in astronomical terms, it will quickly leave the vicinity of the Sun. Its metallicity is only one-fourth that of the Sun, and visitors from outside the thin disk that composes the Milky Way tend to be metal-poor. Gamma Piscium is part of the asterism known as the "circlet of Pisces."[10]

  1. ^ a b c Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference saaoc8_59 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Fuhrmann_Chini_2022 was invoked but never defined (see the help page).
  4. ^ a b c d e f Cite error: The named reference Baines2018 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference scfs was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference aaa458_2_609 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 Liu_et_al_2007 was invoked but never defined (see the help page).
  10. ^ "SPACE.com -- SpaceWatch -- Pisces Rising". Space.com. Archived from the original on July 13, 2010. Retrieved September 30, 2007.