Omega Orionis, a blue main-sequence star in Orion
Omega Orionis is a blue main-sequence star in the constellation Orion. At 1,233 light years away, it shines at an apparent visual magnitude of 4.5.
Omega Orionis (HIP 26594)
Omega Orionis is a blue main-sequence star in the constellation Orion. At 1,233 light years away, it shines at an apparent visual magnitude of 4.50. It is moving through the Galaxy at a speed of 20.5 km/s relative to the Sun and is part of the Orion Molecular Cloud and ASCC 21 and Collinder 70 moving groups. Its projected Galactic orbit carries it between 25,200 and 31,800 light years from the center of the Galaxy.
Sky position: RA 5h 39.2m, Dec +4° 7.2'
Common designations: Omega Orionis, 47 Orionis, HIP 26594, HD 37490
Brightest stars in Orion:
(list all)
| Rank | Mag. | Star |
| 19 | 4.13 | 29 Orionis |
| 20 | 4.20 | A Orionis |
| 21 | 4.35 | Pi-2 Orionis |
| 22 | 4.39 | Phi-1 Orionis |
| 23 | 4.39 | Chi-1 Orionis |
| 24 | 4.42 | Nu Orionis |
| 25 | 4.45 | Xi Orionis |
| 26 | 4.46 | Rho Orionis |
| 27 | 4.47 | Pi-6 Orionis |
28
| 4.50
) Omega Orionis
| Rank | Mag. | Star |
| 29 | 4.53 | HR 2113 |
| 30 | 4.58 | 42 Orionis |
| 31 | 4.59 | Psi Orionis |
| 32 | 4.62 | Thabit |
| 33 | 4.64 | Pi-1 Orionis |
| 34 | 4.64 | Chi-2 Orionis |
| 35 | 4.65 | 11 Orionis |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Omega Orionis
(compared to the Sun)
E
ccentricity: 11.5% vs. 16.0%Angle φ : -2.9°vs. 26.0°
Semi-major axis : 8,747 pc vs. 8,686 pc
Semi-minor axis: 8,689 pc vs. 8,574 pc
Focus-to-center
: 1,004 pcvs. 1,388 pcSemilatus rectum : 8,632 pc vs. 8,464 pc
Perigalacticon: 7,743 pc vs. 7,297 pc
Apogalacticon
: 9,751 pcvs. 10,074 pcSome Tabulated XHIP Data for Omega Orionis
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 84.79644094° ±0.25 mas | 0.78 ±0.27 mas/yr. |
| Declination: | 4.12146652° ±0.15 mas | -0.03 ±0.16 mas/yr. |
| Galactic Longitude: | 200.73410616° | 0.41 mas/yr. |
| Galactic Latitude: | -14.03218129° | 0.66 mas/yr. |
Parallax: 2.36 ± 0.29 mas
Spectrography
Spectral Type: B3Ve 2006MNRAS.371..252L.
Radial Velocity: 20.50 ±0.90 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
n/a
Photometry
band
magnitude
Abs. Mag.
U
3.70
-4.19
B
4.40
-3.49
V
4.50
-3.39
R
I
4.54
-3.35
J
5.01
-2.88
H
4.92
-2.96
K
4.81
-3.08
B-V: -0.10 V-I: -0.04
Derivations
Heliocentric distance: 378.10 pc (fitted to cluster)
Galactocentric distance: 7,744 pc
Transverse velocity: 1.4 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -343.1 pc | -129.9 pc | -91.7 pc |
| Velocity (U, V, W) | -18.6 km/s | -7.8 km/s | -3.8 km/s |