Upsilon Piscium

Upsilon Piscium
Location of υ Piscium (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pisces
Right ascension 01h 19m 27.99289s[1]
Declination +27° 15′ 50.6155″[1]
Apparent magnitude (V) 4.752[2]
Characteristics
Spectral type A3 V[3]
U−B color index +0.10[2]
B−V color index +0.03[2]
Astrometry
Radial velocity (Rv)+5.8±2.7[4] km/s
Proper motion (μ) RA: +22.98[1] mas/yr
Dec.: −11.12[1] mas/yr
Parallax (π)10.59 ± 0.25 mas[1]
Distance308 ± 7 ly
(94 ± 2 pc)
Absolute magnitude (MV)−0.13[5]
Details
Mass2.84±0.05[3] M☉
Radius2.2[6] R☉
Luminosity117[3] L☉
Surface gravity (log g)3.59[7] cgs
Temperature9,183±312[7] K
Metallicity [Fe/H]+0.00±0.05[8] dex
Rotational velocity (v sin i)91[3] km/s
Age461[7] Myr
Other designations
υ Psc, 90 Piscium, BD+26° 220, FK5 45, HD 7964, HIP 6193, HR 383, SAO 74637[9]
Database references
SIMBADdata

Upsilon Piscium is a solitary,[10] white-hued star in the zodiac constellation of Pisces. It is faintly visible to the naked eye, having an apparent visual magnitude of +4.75.[2] Based upon an annual parallax shift of 10.59 mas as seen from Earth,[1] it is located about 308 light years from the Sun. The star is drifting further away with a heliocentric radial velocity of +6 km/s.[4]

This is an ordinary A-type main sequence star with a stellar classification of A3 V.[3] It is 461[7] million years old – about 98% of the way through its main sequence lifetime[3] – and is spinning with a projected rotational velocity of 91 km/s.[3] The star has 2.8[3] times the mass of the Sun, about 2.2[6] times the Sun's radius, and is radiating 117[3] times the Sun's luminosity from its photosphere at an effective temperature of 9183 K.[7]

  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 Johnson1966 was invoked but never defined (see the help page).
  3. ^ a b c d e f g h i Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference aaa367_521 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference David2015 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Morossi2002 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).