83 Ursae Majoris, a red giant star in Ursa Major
83 Ursae Majoris is a red giant star in the constellation Ursa Major. At 522 light years away, it shines at an apparent visual magnitude of 4.63.
83 Ursae Majoris (HIP 66738)
83 Ursae Majoris is a red giant star in the constellation Ursa Major. At 522 light years away, it shines at an apparent visual magnitude of 4.63. The iron abundance of 83 Ursae Majoris is +0.3 (199.5% of the Sun). It is moving through the Galaxy at a speed of 24.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 20,800 and 24,500 light years from the center of the Galaxy. It will come closest to the Sun 4.7 million years from now when it will brighten to magnitude 3.74 from a distance of 348 light years.
Sky position: RA 13h 40.7m, Dec +54° 40.8'
Common designations: 83 Ursae Majoris, HIP 66738, HD 119228, HR 5154
Brightest stars in Ursa Major:
(list all)
| Rank | Mag. | Star |
| 16 | 3.65 | 23 Ursae Majoris |
| 17 | 3.69 | Alkaphrah |
| 18 | 3.78 | Upsilon Ursae Majoris |
| 19 | 3.99 | Alcor |
| 20 | 4.46 | 15 Ursae Majoris |
| 21 | 4.47 | 26 Ursae Majoris |
| 22 | 4.54 | 24 Ursae Majoris |
| 23 | 4.55 | Phi Ursae Majoris |
| 24 | 4.59 | Muscida |
25
| 4.63
) 83 Ursae Majoris
| Rank | Mag. | Star |
| 26 | 4.66 | Omega Ursae Majoris |
| 27 | 4.67 | Tau Ursae Majoris |
| 28 | 4.72 | HR 4132 |
| 29 | 4.74 | Rho Ursae Majoris |
| 30 | 4.76 | 55 Ursae Majoris |
| 31 | 4.80 | Sigma-2 Ursae Majoris |
| 32 | 4.80 | 18 Ursae Majoris |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of 83 Ursae Majoris
(compared to the Sun)
E
ccentricity: 8.1% vs. 16.0%Angle φ : 151.1°vs. 26.0°
Semi-major axis : 6,943 pc vs. 8,686 pc
Semi-minor axis: 6,920 pc vs. 8,574 pc
Focus-to-center
: 565 pcvs. 1,388 pcSemilatus rectum : 6,897 pc vs. 8,464 pc
Perigalacticon: 6,378 pc vs. 7,297 pc
Apogalacticon
: 7,508 pcvs. 10,074 pcSome Tabulated XHIP Data for 83 Ursae Majoris
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 205.18455243° ±0.15 mas | -19.08 ±0.19 mas/yr. |
| Declination: | 54.68166154° ±0.18 mas | -10.60 ±0.20 mas/yr. |
| Galactic Longitude: | 108.17980093° | 13.40 mas/yr. |
| Galactic Latitude: | 61.01203300° | 17.23 mas/yr. |
Parallax: 6.23 ± 0.22 mas
Spectrography
Spectral Type: M2III 1989ApJS...71..245K.
Radial Velocity: -18.61 ±0.20 km/s [A rating] 2005A&A...430..165F.
Iron Abundance [Fe/H]:
0.30 dex
1990AJ.....99.1961F.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 6.26 | 0.24 |
| V | 4.63 | -1.39 |
| R | ||
| I | 2.85 | -3.17 |
| J | 1.36 | -4.66 |
| H | 0.50 | -5.52 |
| K | 0.34 | -5.69 |
B-V: +1.63 V-I: +1.78
Derivations
Heliocentric distance: 160.27 pc (3.5% margin of error)
Galactocentric distance: 7,426 pc
Transverse velocity: 16.6 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -24.2 pc | 73.8 pc | 140.2 pc |
| Velocity (U, V, W) | -3.3 km/s | -22.6 km/s | -9.9 km/s |