84 Ursae Majoris (HIP 67231)

84 Ursae Majoris is a white main-sequence star in the constellation Ursa Major. At 290 light years away, it shines at an apparent visual magnitude of 5.68. 84 Ursae Majoris is the primary component of a multiple-star system and an intrinsic variable star that varies between magntitudes 5.66 and 5.69 over a period of 33.36 hours. It is moving through the Galaxy at a speed of 7 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,000 and 29,200 light years from the center of the Galaxy.

Sky position: RA 13h 46.6m, Dec +54 25.8'

Common designations: 84 Ursae Majoris, HIP 67231, HD 120198, HR 5187

Splendors of the Universe

Magnificent Monthly Calendar



Galactic Orbit of 84 Ursae Majoris

(compared to the Sun)

Eccentricity: 9.9% vs. 16.0%

Angle φ : 24.5 vs. 26.0

Semi-major axis : 8,158 pc vs. 8,686 pc

Semi-minor axis: 8,118 pc vs. 8,574 pc

Focus-to-center: 805 pc vs. 1,388 pc

Semilatus rectum : 8,079 pc vs. 8,464 pc

Perigalacticon: 7,353 pc vs. 7,297 pc

Apogalacticon: 8,964 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for 84 Ursae Majoris
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 206.64864724 0.15 mas -15.60 1.10 mas/yr.
Declination: 54.43269024 0.20 mas -1.50 1.10 mas/yr.
     
Galactic Longitude: 106.37597387 13.39 mas/yr.
Galactic Latitude: 60.88703118 8.15 mas/yr.

Parallax: 11.23 0.23 mas


Spectrography

Spectral Type: A0VpSrCrEu 1995ApJS...99..135A.

Radial Velocity: -2.40 1.60 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: n/a
 



Photometry
 
band magnitude Abs. Mag.
U
B 5.64 0.89
V 5.68 0.93
R
I 5.70 0.95
J 5.71 0.96
H 5.78 1.03
K 5.76 1.01

  B-V: -0.04       V-I: -0.02


Derivations

Heliocentric distance: 89.00 pc (2.0% margin of error)

Galactocentric distance: 7,413 pc

Transverse velocity: 6.6 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) -12.2 pc 41.5 pc 77.8 pc
Velocity (U, V, W) -4.2 km/s -5.6 km/s -0.4 km/s

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