Hatsya, a blue giant star in Orion
Hatsya is a blue giant star in the constellation Orion. At 1,438 light years away, it is the 123rd brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 2.75.
Hatsya (HIP 26241)
Hatsya is a blue giant star in the constellation Orion. At 1,438 light years away, it is the 123rd brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 2.75. Hatsya is the primary component of a multiple-star system. The iron abundance of Hatsya is +0.05 (112.2% of the Sun). It is moving through the Galaxy at a speed of 31.5 km/s relative to the Sun and is part of the Orion Molecular Cloud and Collinder 70 and NGC 1981 and Running Man and Orion Nebula and NGC 1980 moving groups. Its projected Galactic orbit carries it between 25,000 and 27,200 light years from the center of the Galaxy.
Sky position: RA 5h 35.4m, Dec -5° 54.6'
Common designations: Hatsya, Iota Orionis, 44 Orionis, HIP 26241, HD 37043
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Brightest stars in Orion:
(list all)
| Rank | Mag. | Star |
| 1 | 0.18 | Rigel |
| 2 | 0.45 | Betelgeuse |
| 3 | 1.64 | Bellatrix |
| 4 | 1.69 | Alnilam |
| 5 | 1.74 | Alnitak |
| 6 | 2.07 | Saiph |
| 7 | 2.25 | Mintaka |
8
| 2.75
) Hatsya
| Rank | Mag. | Star |
| 9 | 3.19 | Tabit |
| 10 | 3.35 | Eta Orionis |
| 11 | 3.39 | Heka |
| 12 | 3.59 | Tau Orionis |
| 13 | 3.68 | Pi-4 Orionis |
| 14 | 3.71 | Pi-5 Orionis |
| 15 | 3.77 | Sigma Orionis |
| 16 | 4.06 | Omicron-2 Orionis |
| 17 | 4.09 | Phi-2 Orionis |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Hatsya
(compared to the Sun)
E
ccentricity: 4.1% vs. 16.0%Angle φ : -45.7°vs. 26.0°
Semi-major axis : 8,002 pc vs. 8,686 pc
Semi-minor axis: 7,995 pc vs. 8,574 pc
Focus-to-center
: 329 pcvs. 1,388 pcSemilatus rectum : 7,988 pc vs. 8,464 pc
Perigalacticon: 7,673 pc vs. 7,297 pc
Apogalacticon
: 8,331 pcvs. 10,074 pcSome Tabulated XHIP Data for Hatsya
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 83.85825448° ±0.18 mas | 1.42 ±0.21 mas/yr. |
| Declination: | -5.90989986° ±0.12 mas | -0.46 ±0.13 mas/yr. |
| Galactic Longitude: | 209.52210556° | 1.05 mas/yr. |
| Galactic Latitude: | -19.58346955° | 1.06 mas/yr. |
Parallax: 1.40 ± 0.22 mas
Spectrography
Spectral Type: O9.5III 2008ApJS..176..216A.
Radial Velocity:
31.30 ±1.20 km/s [A rating]
2004A&A...424..727P.
This star is a spectroscopic binary with a solved orbit.
Iron Abundance [Fe/H]:
0.05 ±0.04 dex
2011A&A...525A..71W.
Photometry
| band | magnitude | Abs. Mag. |
| U | 1.44 | -6.78 |
| B | 2.54 | -5.68 |
| V | 2.75 | -5.47 |
| R | ||
| I | 2.96 | -5.26 |
| J | 3.49 | -4.73 |
| H | 3.65 | -4.57 |
| K | 3.75 | -4.47 |
B-V: -0.21 V-I: -0.21
Derivations
Heliocentric distance: 441.15 pc (fitted to cluster)
Galactocentric distance: 7,765 pc
Transverse velocity: 3.1 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -361.7 pc | -204.8 pc | -147.9 pc |
| Velocity (U, V, W) | -25.2 km/s | -16.8 km/s | -8.4 km/s |