Psi-2 Piscium (HIP 5310)

Psi-2 Piscium is a white main-sequence star in the constellation Pisces. At 154 light years away, it shines at an apparent visual magnitude of 5.56. It is moving through the Galaxy at a speed of 31.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 17,600 and 24,500 light years from the center of the Galaxy.

Sky position: RA 1h 8.0m, Dec +20 44.4'

Common designations: Psi-2 Piscium, 79 Piscium, HIP 5310, HD 6695

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Galactic Orbit of Psi-2 Piscium

(compared to the Sun)

Eccentricity: 16.3% vs. 16.0%

Angle φ : 159.3 vs. 26.0

Semi-major axis : 6,464 pc vs. 8,686 pc

Semi-minor axis: 6,378 pc vs. 8,574 pc

Focus-to-center: 1,050 pc vs. 1,388 pc

Semilatus rectum : 6,294 pc vs. 8,464 pc

Perigalacticon: 5,414 pc vs. 7,297 pc

Apogalacticon: 7,515 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for Psi-2 Piscium
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 16.98795739 0.68 mas 78.80 0.80 mas/yr.
Declination: 20.73932084 0.46 mas -97.30 0.70 mas/yr.
     
Galactic Longitude: 128.12718315 86.89 mas/yr.
Galactic Latitude: -41.96578478 -90.15 mas/yr.

Parallax: 21.14 0.77 mas


Spectrography

Spectral Type: A3V 1995ApJS...99..135A.

Radial Velocity: -15.20 0.90 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: n/a
 



Photometry
 
band magnitude Abs. Mag.
U
B 5.68 2.31
V 5.56 2.19
R
I 5.44 2.07
J
H
K

  B-V: +0.12       V-I: +0.12


Derivations

Heliocentric distance: 47.23 pc (3.6% margin of error)

Galactocentric distance: 7,422 pc

Transverse velocity: 28.0 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) -21.7 pc 27.6 pc -31.6 pc
Velocity (U, V, W) 0.0 km/s -31.5 km/s -4.8 km/s

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