27 Orionis, an orange giant star in Orion
27 Orionis is an orange giant star in the constellation Orion. At 186 light years away, it shines at an apparent visual magnitude of 5.07.
27 Orionis (HIP 25282)
27 Orionis is an orange giant star in the constellation Orion. At 186 light years away, it shines at an apparent visual magnitude of 5.07. The iron abundance of 27 Orionis is -0.27 (53.7% of the Sun). It is moving through the Galaxy at a speed of 42.5 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,000 and 55,700 light years from the center of the Galaxy.
Sky position: RA 5h 24.5m, Dec -0° 53.4'
Common designations: p Orionis, 27 Orionis, HIP 25282, HD 35410
Brightest stars in Orion:
(list all)
| Rank | Mag. | Star |
| 43 | 4.89 | 25 Orionis |
| 44 | 4.90 | 51 Orionis |
| 45 | 4.91 | Lalande 12104 |
| 46 | 4.95 | HR 1952 |
| 47 | 4.95 | 69 Orionis |
| 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
| Rank | Mag. | Star |
| 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 |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of 27 Orionis
(compared to the Sun)
E
ccentricity: 39.9% vs. 16.0%Angle φ : -17.9°vs. 26.0°
Semi-major axis : 12,220 pc vs. 8,686 pc
Semi-minor axis: 11,206 pc vs. 8,574 pc
Focus-to-center
: 4,873 pcvs. 1,388 pcSemilatus rectum : 10,277 pc vs. 8,464 pc
Perigalacticon: 7,347 pc vs. 7,297 pc
Apogalacticon
: 17,092 pcvs. 10,074 pcSome Tabulated XHIP Data for 27 Orionis
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 81.12046242° ±0.70 mas | -11.10 ±0.90 mas/yr. |
| Declination: | -0.89166924° ±0.50 mas | 136.00 ±0.90 mas/yr. |
| Galactic Longitude: | 203.45627764° | -124.72 mas/yr. |
| Galactic Latitude: | -19.67529770° | 55.36 mas/yr. |
Parallax: 17.48 ± 0.89 mas
Spectrography
Spectral Type: K0 III 1999MSS...C05....0H.
Radial Velocity:
21.18 ±0.15 km/s [A rating]
2004A&A...424..727P.
This star is a spectroscopic binary with a solved orbit.
Iron Abundance [Fe/H]:
-0.27 ±0.03 dex
2011A&A...525A..71W, 2004A&A...425..187T, 1990ApJS...74.1075M.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 6.03 | 2.25 |
| V | 5.07 | 1.29 |
| R | ||
| I | 4.22 | 0.44 |
| J | 3.61 | -0.17 |
| H | 3.03 | -0.75 |
| K | 2.98 | -0.81 |
B-V: +0.96 V-I: +0.85
Derivations
Heliocentric distance: 57.03 pc (5.1% margin of error)
Galactocentric distance: 7,449 pc
Transverse velocity: 36.9 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -49.3 pc | -21.4 pc | -19.2 pc |
| Velocity (U, V, W) | -36.3 km/s | 21.0 km/s | 7.0 km/s |