24 Ursae Majoris, a yellow main-sequence star in Ursa Major
24 Ursae Majoris is a yellow main-sequence star in the constellation Ursa Major. At 104 light years away, it shines at an apparent visual magnitude of 4.54.
24 Ursae Majoris (HIP 46977)
24 Ursae Majoris is a yellow main-sequence star in the constellation Ursa Major. At 104 light years away, it shines at an apparent visual magnitude of 4.54. The iron abundance of 24 Ursae Majoris is -0.25 (56.2% of the Sun). It is moving through the Galaxy at a speed of 31 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,000 and 33,300 light years from the center of the Galaxy. It will come closest to the Sun 879,000 years from now when it will brighten to magnitude 2.99 from a distance of 51 light years.
Sky position: RA 9h 34.5m, Dec +69° 49.8'
Common designations: d Ursae Majoris, 24 Ursae Majoris, HIP 46977, HD 82210, Gliese 355.1
Brightest stars in Ursa Major:
(list all)
| Rank | Mag. | Star |
| 13 | 3.45 | Tania Borealis |
| 14 | 3.49 | Alula Borealis |
| 15 | 3.57 | Kappa Ursae Majoris |
| 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
| Rank | Mag. | Star |
| 23 | 4.55 | Phi Ursae Majoris |
| 24 | 4.59 | Muscida |
| 25 | 4.63 | 83 Ursae Majoris |
| 26 | 4.66 | Omega Ursae Majoris |
| 27 | 4.67 | Tau Ursae Majoris |
| 28 | 4.72 | HR 4132 |
| 29 | 4.74 | Rho Ursae Majoris |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of 24 Ursae Majoris
(compared to the Sun)
E
ccentricity: 18.2% vs. 16.0%Angle φ : 46.7°vs. 26.0°
Semi-major axis : 8,631 pc vs. 8,686 pc
Semi-minor axis: 8,487 pc vs. 8,574 pc
Focus-to-center
: 1,570 pcvs. 1,388 pcSemilatus rectum : 8,345 pc vs. 8,464 pc
Perigalacticon: 7,061 pc vs. 7,297 pc
Apogalacticon
: 10,200 pcvs. 10,074 pcSome Tabulated XHIP Data for 24 Ursae Majoris
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 143.62069997° ±0.13 mas | -63.80 ±0.15 mas/yr. |
| Declination: | 69.83015424° ±0.13 mas | 77.26 ±0.14 mas/yr. |
| Galactic Longitude: | 142.54891787° | -35.11 mas/yr. |
| Galactic Latitude: | 38.93065753° | -93.84 mas/yr. |
Parallax: 31.32 ± 0.19 mas
Spectrography
Spectral Type: G9V Fe-0.7 2003AJ....126.2048G.
Radial Velocity: -27.00 ±0.20 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
-0.25 dex
2011A&A...525A..71W, 2009A&A...501..941H, 2005ApJS..161..444T, 1990ApJS...74.1075M.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 5.32 | 2.80 |
| V | 4.54 | 2.02 |
| R | ||
| I | 3.82 | 1.29 |
| J | 3.16 | 0.64 |
| H | 2.74 | 0.21 |
| K | 2.51 | -0.01 |
B-V: +0.78 V-I: +0.72
Derivations
Heliocentric distance: 31.93 pc (0.6% margin of error)
Galactocentric distance: 7,420 pc
Transverse velocity: 15.2 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -19.7 pc | 15.1 pc | 20.1 pc |
| Velocity (U, V, W) | 12.8 km/s | -3.1 km/s | -28.0 km/s |