H Scorpii, an orange giant star in Scorpius
H Scorpii is an orange giant star in the constellation Scorpius. At 342 light years away, it shines at an apparent visual magnitude of 4.18.
H Scorpii (HIP 81304)
H Scorpii is an orange giant star in the constellation Scorpius. At 342 light years away, it shines at an apparent visual magnitude of 4.18. It is moving through the Galaxy at a speed of 9.8 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,500 and 38,200 light years from the center of the Galaxy.
Sky position: RA 16h 36.4m, Dec -35° 15.6'
Common designations: H Scorpii, HIP 81304, HD 149447, HR 6166
Brightest stars in Scorpius:
(list all)
| Rank | Mag. | Star |
| 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 |
| 18 | 3.87 | Rho Scorpii |
| 19 | 3.93 | Omega-1 Scorpii |
| 20 | 4.00 | Jabbah |
21
| 4.18
) H Scorpii
| Rank | Mag. | Star |
| 22 | 4.24 | N Scorpii |
| 23 | 4.26 | Q Scorpii |
| 24 | 4.31 | Omega-2 Scorpii |
| 25 | 4.55 | Omicron Scorpii |
| 26 | 4.58 | 13 Scorpii |
| 27 | 4.59 | A Scorpii |
| 28 | 4.63 | 1 Scorpii |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of H Scorpii
(compared to the Sun)
E
ccentricity: 23.8% vs. 16.0%Angle φ : 19.3°vs. 26.0°
Semi-major axis : 9,475 pc vs. 8,686 pc
Semi-minor axis: 9,203 pc vs. 8,574 pc
Focus-to-center
: 2,254 pcvs. 1,388 pcSemilatus rectum : 8,938 pc vs. 8,464 pc
Perigalacticon: 7,220 pc vs. 7,297 pc
Apogalacticon
: 11,729 pcvs. 10,074 pcSome Tabulated XHIP Data for H Scorpii
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 249.09358654° ±0.14 mas | 15.60 ±0.17 mas/yr. |
| Declination: | -35.25535539° ±0.11 mas | 11.35 ±0.14 mas/yr. |
| Galactic Longitude: | 346.21987115° | 18.85 mas/yr. |
| Galactic Latitude: | 8.08988356° | -4.12 mas/yr. |
Parallax: 9.52 ± 0.16 mas
Spectrography
Spectral Type: K5 III 1982MSS...C03....0H.
Radial Velocity: -2.10 ±0.70 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
n/a
Photometry
band
magnitude
Abs. Mag.
U
B
5.72
0.61
V
4.18
-0.93
R
I
2.63
-2.47
J
1.37
-3.74
H
0.55
-4.56
K
0.39
-4.72
B-V: +1.54 V-I: +1.55
Derivations
Heliocentric distance: 105.01 pc (1.7% margin of error)
Galactocentric distance: 7,299 pc
Transverse velocity: 9.6 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | 101.0 pc | -24.8 pc | 14.8 pc |
| Velocity (U, V, W) | 0.5 km/s | 9.5 km/s | -2.3 km/s |