45 Orionis, a white subgiant star in Orion
45 Orionis is a white subgiant star in the constellation Orion. At 359 light years away, it shines at an apparent visual magnitude of 5.24.
45 Orionis (HIP 26268)
45 Orionis is a white subgiant star in the constellation Orion. At 359 light years away, it shines at an apparent visual magnitude of 5.24. 45 Orionis is the primary component of a multiple-star system. It is moving through the Galaxy at a speed of 9.7 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,000 and 40,800 light years from the center of the Galaxy. It will come closest to the Sun 9.7 million years from now when it will brighten to magnitude 3.67 from a distance of 174 light years.
Sky position: RA 5h 35.7m, Dec -4° 51.6'
Common designations: 45 Orionis, HIP 26268, HD 37077
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Brightest stars in Orion:
(list all)
| Rank | Mag. | Star |
| 50 | 4.99 | 23 Orionis |
| 51 | 5.04 | 74 Orionis |
| 52 | 5.07 | 27 Orionis |
| 53 | 5.13 | Theta-1 Orionis C |
| 54 | 5.14 | 64 Orionis |
| 55 | 5.18 | 6 Orionis |
| 56 | 5.18 | HR 1684 |
| 57 | 5.20 | 71 Orionis |
| 58 | 5.21 | 60 Orionis |
59
| 5.24
) 45 Orionis
| Rank | Mag. | Star |
| 60 | 5.26 | 52 Orionis |
| 61 | 5.32 | 38 Orionis |
| 62 | 5.33 | 5 Orionis |
| 63 | 5.33 | HR 1571 |
| 64 | 5.33 | 14 Orionis |
| 65 | 5.34 | 21 Orionis |
| 66 | 5.34 | HR 1861 |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of 45 Orionis
(compared to the Sun)
E
ccentricity: 26.0% vs. 16.0%Angle φ : 24.0°vs. 26.0°
Semi-major axis : 9,939 pc vs. 8,686 pc
Semi-minor axis: 9,598 pc vs. 8,574 pc
Focus-to-center
: 2,582 pcvs. 1,388 pcSemilatus rectum : 9,269 pc vs. 8,464 pc
Perigalacticon: 7,358 pc vs. 7,297 pc
Apogalacticon
: 12,521 pcvs. 10,074 pcSome Tabulated XHIP Data for 45 Orionis
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 83.91452096° ±0.32 mas | -1.50 ±1.00 mas/yr. |
| Declination: | -4.85608640° ±0.21 mas | 8.90 ±1.00 mas/yr. |
| Galactic Longitude: | 208.55299618° | -8.61 mas/yr. |
| Galactic Latitude: | -19.05687723° | 2.71 mas/yr. |
Parallax: 9.07 ± 0.40 mas
Spectrography
Spectral Type: A9 IV/V 1999MSS...C05....0H.
Radial Velocity: -8.50 ±1.78 km/s [B rating] 2007AN....328..889K.
Iron Abundance [Fe/H]:
n/a
Photometry
band
magnitude
Abs. Mag.
U
B
5.51
0.30
V
5.24
0.03
R
I
4.97
-0.23
J
5.09
-0.11
H
4.67
-0.53
K
4.48
-0.73
B-V: +0.27 V-I: +0.27
Derivations
Heliocentric distance: 110.00 pc (4.4% margin of error)
Galactocentric distance: 7,491 pc
Transverse velocity: 4.7 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -91.3 pc | -49.7 pc | -35.9 pc |
| Velocity (U, V, W) | 4.5 km/s | 7.6 km/s | 4.1 km/s |