71 Orionis, a white subgiant star in Orion
71 Orionis is a white subgiant star in the constellation Orion. At 68 light years away, it shines at an apparent visual magnitude of 5.2.
71 Orionis (HIP 29650)
71 Orionis is a white subgiant star in the constellation Orion. At 68 light years away, it shines at an apparent visual magnitude of 5.20. 71 Orionis is the primary component of a multiple-star system. The star's age is estimated to be 1 billion years but is certainly no greater than 1.9 billion years. The iron abundance of 71 Orionis is +0.06 (114.8% of the Sun). It is moving through the Galaxy at a speed of 40.7 km/s relative to the Sun. Its projected Galactic orbit carries it between 21,500 and 25,800 light years from the center of the Galaxy. It came closest to the Sun 433,000 years ago when it had brightened to magnitude 3.69 from a distance of 34 light years.
Sky position: RA 6h 14.8m, Dec +19° 9.6'
Common designations: 71 Orionis, HIP 29650, HD 43042, Gliese 3390
Moon Calendar Poster
Outstanding Lunar Images
Brightest stars in Orion:
(list all)
| Rank | Mag. | Star |
| 48 | 4.98 | Theta-1 Orionis |
| 49 | 4.98 | Theta-2 Orionis |
| 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
| Rank | Mag. | Star |
| 58 | 5.21 | 60 Orionis |
| 59 | 5.24 | 45 Orionis |
| 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 |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of 71 Orionis
(compared to the Sun)
E
ccentricity: 9.2% vs. 16.0%Angle φ : -109.4°vs. 26.0°
Semi-major axis : 7,255 pc vs. 8,686 pc
Semi-minor axis: 7,224 pc vs. 8,574 pc
Focus-to-center
: 670 pcvs. 1,388 pcSemilatus rectum : 7,193 pc vs. 8,464 pc
Perigalacticon: 6,585 pc vs. 7,297 pc
Apogalacticon
: 7,925 pcvs. 10,074 pcSome Tabulated XHIP Data for 71 Orionis
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 93.71223287° ±0.32 mas | -96.90 ±0.70 mas/yr. |
| Declination: | 19.15688947° ±0.19 mas | -181.90 ±0.70 mas/yr. |
| Galactic Longitude: | 191.79637103° | 113.61 mas/yr. |
| Galactic Latitude: | 0.91592600° | -171.96 mas/yr. |
Parallax: 48.04 ± 0.34 mas
Spectrography
Spectral Type: F5.5IV-V 2003AJ....126.2048G.
Radial Velocity: 35.30 ±0.83 km/s [A rating] 2005ApJS..159..141V.
Iron Abundance [Fe/H]:
0.06 ±0.01 dex
2011A&A...530A.138C, 2011A&A...525A..71W, 2007A&A...465..271R, 2005PASJ...57...27T, 2005ApJS..161..444T, 2005ApJS..159..141V, 2000Priv.C........F, 2000A&A...364..249M, 1996A&A...314..191G, 1993A&A...275..101E.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 5.63 | 4.04 |
| V | 5.20 | 3.61 |
| R | 4.90 | 3.31 |
| I | 4.70 | 3.11 |
| J | 4.01 | 2.42 |
| H | 3.83 | 2.24 |
| K | 4.13 | 2.54 |
B-V: +0.43 V-I: +0.50
Derivations
Heliocentric distance: 20.81 pc (0.7% margin of error)
Galactocentric distance: 7,420 pc
Transverse velocity: 20.3 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -20.4 pc | -4.3 pc | 0.3 pc |
| Velocity (U, V, W) | -32.5 km/s | -18.2 km/s | -16.4 km/s |