10 Ursae Majoris, a white main-sequence star in Lynx
10 Ursae Majoris is a white main-sequence star in the constellation Lynx. At 52 light years away, it is the 494th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.96.
10 Ursae Majoris (HIP 44248)
10 Ursae Majoris is a white main-sequence star in the constellation Lynx. At 52 light years away, it is the 494th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.96. 10 Ursae Majoris is a multiple-star system. The star's age is estimated to be 1.7 billion years but is certainly no less than 1.5 billion years and no greater than 1.9 billion years. The iron abundance of 10 Ursae Majoris is +0.14 (138.0% of the Sun). It is moving through the Galaxy at a speed of 48.2 km/s relative to the Sun. Its projected Galactic orbit carries it between 21,100 and 28,500 light years from the center of the Galaxy. It came closest to the Sun 188,000 years ago when it had brightened to magnitude 3.52 from a distance of 43 light years.
Sky position: RA 9h 0.6m, Dec +41° 46.8'
Common designations: 10 Ursae Majoris, HIP 44248, HD 76943, Gliese 332.0
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Brightest stars in Lynx:
(list all)
| Rank | Mag. | Star |
| 1 | 3.14 | Alpha Lyncis |
| 2 | 3.82 | 38 Lyncis |
3
| 3.96
) 10 Ursae Majoris
| Rank | Mag. | Star |
| 4 | 4.25 | Alsciaukat |
| 5 | 4.35 | 15 Lyncis |
| 6 | 4.44 | 2 Lyncis |
| 7 | 4.56 | HR 3612 |
| 8 | 4.61 | 21 Lyncis |
| 9 | 4.78 | 27 Lyncis |
| 10 | 4.81 | HR 3809 |
| 11 | 4.86 | 12 Lyncis |
| 12 | 4.90 | 16 Lyncis |
| 13 | 4.93 | 24 Lyncis |
| 14 | 5.00 | HR 2751 |
| 15 | 5.01 | 1 Lyncis |
| 16 | 5.15 | HD 62647 |
| 17 | 5.15 | 35 Lyncis |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of 10 Ursae Majoris
(compared to the Sun)
E
ccentricity: 14.9% vs. 16.0%Angle φ : -88.6°vs. 26.0°
Semi-major axis : 7,607 pc vs. 8,686 pc
Semi-minor axis: 7,522 pc vs. 8,574 pc
Focus-to-center
: 1,133 pcvs. 1,388 pcSemilatus rectum : 7,438 pc vs. 8,464 pc
Perigalacticon: 6,474 pc vs. 7,297 pc
Apogalacticon
: 8,740 pcvs. 10,074 pcSome Tabulated XHIP Data for 10 Ursae Majoris
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 135.16146546° ±0.55 mas | -474.31 ±0.86 mas/yr. |
| Declination: | 41.78344222° ±0.43 mas | -204.21 ±0.68 mas/yr. |
| Galactic Longitude: | 179.80329373° | 189.54 mas/yr. |
| Galactic Latitude: | 41.18288889° | -480.36 mas/yr. |
Parallax: 62.23 ± 0.68 mas
Spectrography
Spectral Type: F4V 2009ApJS..180..117A.
Radial Velocity:
27.80 ±2.80 km/s [D rating]
2006AstL...32..759G.
This star is a spectroscopic binary with an unsolved orbit.
Iron Abundance [Fe/H]:
0.14 ±0.02 dex
2011A&A...530A.138C, 2011A&A...525A..71W, 2007ApJS..169..430R, 2005ApJS..161..444T, 1994AJ....108..271G.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 4.42 | 3.39 |
| V | 3.96 | 2.93 |
| R | 3.70 | 2.67 |
| I | 3.50 | 2.47 |
| J | 3.21 | 2.18 |
| H | 3.08 | 2.05 |
| K | 3.00 | 1.97 |
B-V: +0.46 V-I: +0.46
Derivations
Heliocentric distance: 16.07 pc (1.1% margin of error)
Galactocentric distance: 7,412 pc
Transverse velocity: 39.3 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -12.1 pc | 0.0 pc | 10.6 pc |
| Velocity (U, V, W) | -45.1 km/s | -14.3 km/s | -9.2 km/s |