Epsilon Scorpii, an orange giant star in Scorpius
Epsilon Scorpii is an orange giant star in the constellation Scorpius. At 64 light years away, it is the 78th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 2.29.
Epsilon Scorpii (HIP 82396)
Epsilon Scorpii is an orange giant star in the constellation Scorpius. At 64 light years away, it is the 78th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 2.29. The iron abundance of Epsilon Scorpii is -0.08 (83.2% of the Sun). It is moving through the Galaxy at a speed of 61.7 km/s relative to the Sun. Its projected Galactic orbit carries it between 13,000 and 24,100 light years from the center of the Galaxy.
Sky position: RA 16h 50.2m, Dec -34° 17.4'
Common designations: Epsilon Scorpii, 26 Scorpii, HIP 82396, HD 151680, HR 6241, Gliese 639.1
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Brightest stars in Scorpius:
(list all)
| Rank | Mag. | Star |
| 1 | 1.06 | Antares |
| 2 | 1.62 | Shaula |
| 3 | 1.86 | Sargas |
| 4 | 2.29 | Dschubba |
5
| 2.29
) Epsilon Scorpii
| Rank | Mag. | Star |
| 6 | 2.39 | Kappa Scorpii |
| 7 | 2.56 | Graffias |
| 8 | 2.70 | Lesath |
| 9 | 2.82 | Alniyat |
| 10 | 2.89 | Pi Scorpii |
| 11 | 2.90 | Alniyat |
| 12 | 2.99 | Iota-1 Scorpii |
| 13 | 3.00 | Mu-1 Scorpii |
| 14 | 3.19 | G Scorpii |
| 15 | 3.32 | Eta Scorpii |
| 16 | 3.56 | Mu-2 Scorpii |
| 17 | 3.62 | Grafias |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Epsilon Scorpii
(compared to the Sun)
E
ccentricity: 30.0% vs. 16.0%Angle φ : -178.2°vs. 26.0°
Semi-major axis : 5,678 pc vs. 8,686 pc
Semi-minor axis: 5,416 pc vs. 8,574 pc
Focus-to-center
: 1,705 pcvs. 1,388 pcSemilatus rectum : 5,166 pc vs. 8,464 pc
Perigalacticon: 3,973 pc vs. 7,297 pc
Apogalacticon
: 7,383 pcvs. 10,074 pcSome Tabulated XHIP Data for Epsilon Scorpii
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 252.54268726° ±0.19 mas | -614.66 ±0.20 mas/yr. |
| Declination: | -34.29260943° ±0.12 mas | -255.95 ±0.13 mas/yr. |
| Galactic Longitude: | 348.81251426° | -587.62 mas/yr. |
| Galactic Latitude: | 6.56014600° | 313.08 mas/yr. |
Parallax: 51.19 ± 0.22 mas
Spectrography
Spectral Type: K1III 2006AJ....132..161G.
Radial Velocity: -2.50 ±0.50 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
-0.08 dex
1990ApJS...74.1075M.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 3.43 | 1.98 |
| V | 2.29 | 0.84 |
| R | ||
| I | 1.19 | -0.26 |
| J | 0.42 | -1.03 |
| H | -0.25 | -1.70 |
| K | -0.39 | -1.85 |
B-V: +1.14 V-I: +1.10
Derivations
Heliocentric distance: 19.53 pc (0.4% margin of error)
Galactocentric distance: 7,381 pc
Transverse velocity: 61.7 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | 19.0 pc | -3.8 pc | 2.2 pc |
| Velocity (U, V, W) | -16.2 km/s | -52.3 km/s | 28.5 km/s |