HD 28459 (HIP 21038)

HD 28459 is a blue main-sequence star in the constellation Perseus. At 374 light years away, it shines at an apparent visual magnitude of 6.18. HD 28459 is a multiple-star system. It is moving through the Galaxy at a speed of 18.4 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,500 and 29,900 light years from the center of the Galaxy. It came closest to the Sun 5.2 million years ago when it had brightened to magnitude 4.81 from a distance of 199 light years.

Sky position: RA 4h 30.6m, Dec +32 27.6'

Common designations: HIP 21038, HD 28459

Mystic Mountain

High-definition
Astronomy Poster



Galactic Orbit of HD 28459

(compared to the Sun)

Eccentricity: 10.0% vs. 16.0%

Angle φ : -10.0 vs. 26.0

Semi-major axis : 8,331 pc vs. 8,686 pc

Semi-minor axis: 8,290 pc vs. 8,574 pc

Focus-to-center: 832 pc vs. 1,388 pc

Semilatus rectum : 8,248 pc vs. 8,464 pc

Perigalacticon: 7,500 pc vs. 7,297 pc

Apogalacticon: 9,163 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for HD 28459
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 67.66000979 0.37 mas 8.20 1.20 mas/yr.
Declination: 32.45781465 0.21 mas -16.00 1.20 mas/yr.
     
Galactic Longitude: 167.52278526 17.36 mas/yr.
Galactic Latitude: -10.84515351 -4.68 mas/yr.

Parallax: 8.69 0.43 mas


Spectrography

Spectral Type: B9.5Vn 1969AJ.....74..375C.

Radial Velocity: 15.60 1.80 km/s [B rating] 2007AN....328..889K.

Iron Abundance [Fe/H]: n/a
 



Photometry
 
band magnitude Abs. Mag.
U
B 6.15 0.86
V 6.18 0.88
R
I 6.17 0.87
J 6.13 0.83
H 6.22 0.92
K 6.20 0.90

  B-V: -0.03       V-I: +0.01


Derivations

Heliocentric distance: 114.74 pc (4.9% margin of error)

Galactocentric distance: 7,510 pc

Transverse velocity: 9.8 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) -110.0 pc 24.3 pc -21.6 pc
Velocity (U, V, W) -16.5 km/s -6.0 km/s -5.4 km/s

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