Epsilon Pyxidis (HIP 45001)

Epsilon Pyxidis is a white giant star in the constellation Pyxis. At 212 light years away, it shines at an apparent visual magnitude of 5.59. Epsilon Pyxidis is the primary component of a multiple-star system. The iron abundance of Epsilon Pyxidis is +0.01 (102.3% of the Sun). It is moving through the Galaxy at a speed of 17.7 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,200 and 37,900 light years from the center of the Galaxy.

Sky position: RA 9h 9.9m, Dec -30 22.2'

Common designations: Epsilon Pyxidis, HIP 45001, HD 78922

Splendors of the Universe

Magnificent Monthly Calendar



Galactic Orbit of Epsilon Pyxidis

(compared to the Sun)

Eccentricity: 24.0% vs. 16.0%

Angle φ : 37.0 vs. 26.0

Semi-major axis : 9,372 pc vs. 8,686 pc

Semi-minor axis: 9,099 pc vs. 8,574 pc

Focus-to-center: 2,245 pc vs. 1,388 pc

Semilatus rectum : 8,834 pc vs. 8,464 pc

Perigalacticon: 7,127 pc vs. 7,297 pc

Apogalacticon: 11,617 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for Epsilon Pyxidis
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 137.48504811 0.15 mas -2.20 0.70 mas/yr.
Declination: -30.36528258 0.20 mas -48.10 0.70 mas/yr.
     
Galactic Longitude: 256.41860236 34.54 mas/yr.
Galactic Latitude: 11.87775094 -33.55 mas/yr.

Parallax: 15.39 0.30 mas


Spectrography

Spectral Type: A6III-IV 1995ApJS...99..135A.

Radial Velocity: -9.70 0.30 km/s [B rating] 2007A&A...475..519H.

Iron Abundance [Fe/H]: 0.01 0.08 dex  2011A&A...530A.138C.
 



Photometry
 
band magnitude Abs. Mag.
U
B 5.77 1.71
V 5.59 1.53
R
I 5.46 1.40
J 5.29 1.23
H 5.23 1.17
K 5.14 1.08

  B-V: +0.18       V-I: +0.13


Derivations

Heliocentric distance: 64.95 pc (1.9% margin of error)

Galactocentric distance: 7,415 pc

Transverse velocity: 14.8 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) -14.9 pc -61.8 pc 13.4 pc
Velocity (U, V, W) 12.1 km/s 4.7 km/s -12.1 km/s

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