22 Orionis, a blue main-sequence star in Orion
22 Orionis is a blue main-sequence star in the constellation Orion. At 1,131 light years away, it shines at an apparent visual magnitude of 4.72.
22 Orionis (HIP 25044)
22 Orionis is a blue main-sequence star in the constellation Orion. At 1,131 light years away, it shines at an apparent visual magnitude of 4.72. The iron abundance of 22 Orionis is -0.31 (49.0% of the Sun). It is moving through the Galaxy at a speed of 28.2 km/s relative to the Sun and is part of the Orion Molecular Cloud and Collinder 70 moving groups. Its projected Galactic orbit carries it between 24,900 and 32,300 light years from the center of the Galaxy.
Sky position: RA 5h 21.8m, Dec -0° 22.8'
Common designations: o Orionis, 22 Orionis, HIP 25044, HD 35039
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Brightest stars in Orion:
(list all)
| 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 |
| 36 | 4.71 | Omicron-1 Orionis |
| 37 | 4.71 | 31 Orionis |
38
| 4.72
) 22 Orionis
| Rank | Mag. | Star |
| 39 | 4.76 | 56 Orionis |
| 40 | 4.77 | 49 Orionis |
| 41 | 4.78 | HR 1887 |
| 42 | 4.81 | 15 Orionis |
| 43 | 4.89 | 25 Orionis |
| 44 | 4.90 | 51 Orionis |
| 45 | 4.91 | Lalande 12104 |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of 22 Orionis
(compared to the Sun)
E
ccentricity: 12.8% vs. 16.0%Angle φ : -19.9°vs. 26.0°
Semi-major axis : 8,777 pc vs. 8,686 pc
Semi-minor axis: 8,704 pc vs. 8,574 pc
Focus-to-center
: 1,127 pcvs. 1,388 pcSemilatus rectum : 8,632 pc vs. 8,464 pc
Perigalacticon: 7,650 pc vs. 7,297 pc
Apogalacticon
: 9,903 pcvs. 10,074 pcSome Tabulated XHIP Data for 22 Orionis
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 80.44061548° ±0.43 mas | -0.70 ±0.60 mas/yr. |
| Declination: | -0.38246940° ±0.25 mas | 2.20 ±0.60 mas/yr. |
| Galactic Longitude: | 202.63408280° | -2.26 mas/yr. |
| Galactic Latitude: | -20.02653258° | 0.45 mas/yr. |
Parallax: 3.51 ± 0.49 mas
Spectrography
Spectral Type: B2Vs 1977PASP...89..797A.
Radial Velocity:
27.90 ±10.00 km/s [D rating]
2007AN....328..889K.
This star is a spectroscopic binary with an unsolved orbit.
Iron Abundance [Fe/H]:
-0.31 dex
1992ApJ...387..673G.
Photometry
| band | magnitude | Abs. Mag. |
| U | 3.79 | -3.91 |
| B | 4.55 | -3.15 |
| V | 4.72 | -2.98 |
| R | ||
| I | 4.86 | -2.85 |
| J | 5.47 | -2.24 |
| H | 5.24 | -2.47 |
| K | 5.22 | -2.48 |
B-V: -0.17 V-I: -0.14
Derivations
Heliocentric distance: 347.00 pc (fitted to cluster)
Galactocentric distance: 7,703 pc
Transverse velocity: 3.8 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -300.9 pc | -125.5 pc | -118.8 pc |
| Velocity (U, V, W) | -25.9 km/s | -6.7 km/s | -8.9 km/s |