75 Orionis, a white main-sequence star in Orion
75 Orionis is a white main-sequence star in the constellation Orion. At 225 light years away, it shines at an apparent visual magnitude of 5.39.
75 Orionis (HIP 29850)
75 Orionis is a white main-sequence star in the constellation Orion. At 225 light years away, it shines at an apparent visual magnitude of 5.39. 75 Orionis is a component of a multiple-star system. It is moving through the Galaxy at a speed of 24.6 km/s relative to the Sun. Its projected Galactic orbit carries it between 21,200 and 24,600 light years from the center of the Galaxy. It came closest to the Sun 1.6 million years ago when it had brightened to magnitude 4.93 from a distance of 182 light years.
Sky position: RA 6h 17.1m, Dec +9° 56.4'
Common designations: l Orionis, 75 Orionis, HIP 29850, HD 43525
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Brightest stars in Orion:
(list all)
| Rank | Mag. | Star |
| 63 | 5.33 | HR 1571 |
| 64 | 5.33 | 14 Orionis |
| 65 | 5.34 | 21 Orionis |
| 66 | 5.34 | HR 1861 |
| 67 | 5.34 | 72 Orionis |
| 68 | 5.35 | HR 1519 |
| 69 | 5.36 | VV Orionis |
| 70 | 5.36 | 55 Orionis |
| 71 | 5.39 | HR 1507 |
72
| 5.39
) 75 Orionis
| Rank | Mag. | Star |
| 73 | 5.43 | 16 Orionis |
| 74 | 5.44 | 73 Orionis |
| 75 | 5.46 | 33 Orionis |
| 76 | 5.50 | HR 1709 |
| 77 | 5.52 | 18 Orionis |
| 78 | 5.60 | HR 1799 |
| 79 | 5.60 | 35 Orionis |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of 75 Orionis
(compared to the Sun)
E
ccentricity: 7.5% vs. 16.0%Angle φ : 151.9°vs. 26.0°
Semi-major axis : 7,012 pc vs. 8,686 pc
Semi-minor axis: 6,992 pc vs. 8,574 pc
Focus-to-center
: 524 pcvs. 1,388 pcSemilatus rectum : 6,972 pc vs. 8,464 pc
Perigalacticon: 6,488 pc vs. 7,297 pc
Apogalacticon
: 7,536 pcvs. 10,074 pcSome Tabulated XHIP Data for 75 Orionis
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 94.27756970° ±0.29 mas | 9.00 ±0.90 mas/yr. |
| Declination: | 9.94253598° ±0.22 mas | -60.00 ±0.90 mas/yr. |
| Galactic Longitude: | 200.16490695° | 57.13 mas/yr. |
| Galactic Latitude: | -2.98542538° | -20.43 mas/yr. |
Parallax: 14.47 ± 0.34 mas
Spectrography
Spectral Type: A1Vn 2001A&A...373..625P.
Radial Velocity: 14.50 ±1.20 km/s [B rating] 2007AN....328..889K.
Iron Abundance [Fe/H]:
n/a
Photometry
band
magnitude
Abs. Mag.
U
B
5.50
1.30
V
5.39
1.19
R
I
5.29
1.09
J
H
K
B-V: +0.11 V-I: +0.10
Derivations
Heliocentric distance: 69.06 pc (2.3% margin of error)
Galactocentric distance: 7,465 pc
Transverse velocity: 19.9 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -64.7 pc | -23.8 pc | -3.6 pc |
| Velocity (U, V, W) | -6.8 km/s | -22.4 km/s | -7.4 km/s |