Psi Hydrae

Psi Hydrae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Hydra
Right ascension 13h 09m 03.27026s[1]
Declination −23° 07′ 05.0501″[1]
Apparent magnitude (V) 4.97[2]
Characteristics
Spectral type K0 III[3]
U−B color index +0.95[2]
B−V color index +1.05[2]
Astrometry
Radial velocity (Rv)−17.2±0.6[4] km/s
Proper motion (μ) RA: −20.08[1] mas/yr
Dec.: −39.81[1] mas/yr
Parallax (π)14.09 ± 0.48 mas[1]
Distance231 ± 8 ly
(71 ± 2 pc)
Absolute magnitude (MV)+0.54[5]
Details
Radius10.6[6] R☉
Luminosity56[7] L☉
Surface gravity (log g)2.72[5] cgs
Temperature4,680[5] K
Metallicity [Fe/H]−0.19±0.04[5] dex
Other designations
ψ Hya, 45 Hydrae, BD−22°3515, HD 114149, HIP 64166, HR 4958, SAO 181410[8]
Database references
SIMBADdata

Psi Hydrae (ψ Hydrae) is a star system in the equatorial constellation of Hydra. Based upon an annual parallax shift of 14.09 mas as seen from Earth, it is located around 231 light years away from the Sun. It is faintly visible to the naked eye with an apparent magnitude of 4.97.[2]

  1. ^ a b c d e 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 Mermilliod1986 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference houk1978 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. ^ a b c d Cite error: The named reference McWilliam1990 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference lang2006 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Mcdonald2012 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).