84 Ursae Majoris, a white main-sequence star in Ursa Major
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 (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
Galactic Orbit of
84 Ursae Majoris
(compared to the
Sun)
E
ccentricity: 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 pcvs. 1,388 pcSemilatus rectum : 8,079 pc vs. 8,464 pc
Perigalacticon: 7,353 pc vs. 7,297 pc
Apogalacticon
: 8,964 pcvs. 10,074 pcSome 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 |