12 Scorpii, a blue main-sequence star in Scorpius
12 Scorpii is a blue main-sequence star in the constellation Scorpius. At 301 light years away, it shines at an apparent visual magnitude of 5.67.
12 Scorpii (HIP 79399)
12 Scorpii is a blue main-sequence star in the constellation Scorpius. At 301 light years away, it shines at an apparent visual magnitude of 5.67. 12 Scorpii is a multiple-star system. It is moving through the Galaxy at a speed of 22.3 km/s relative to the Sun. Its projected Galactic orbit carries it between 20,200 and 24,300 light years from the center of the Galaxy.
Sky position: RA 16h 12.3m, Dec -28° 25.2'
Common designations: c-1 Scorpii, 12 Scorpii, HIP 79399, HD 145483, HR 6029
Galactic Orbit of
12 Scorpii
(compared to the
Sun)
E
ccentricity: 9.1% vs. 16.0%Angle φ : 145.9°vs. 26.0°
Semi-major axis : 6,821 pc vs. 8,686 pc
Semi-minor axis: 6,793 pc vs. 8,574 pc
Focus-to-center
: 618 pcvs. 1,388 pcSemilatus rectum : 6,765 pc vs. 8,464 pc
Perigalacticon: 6,202 pc vs. 7,297 pc
Apogalacticon
: 7,439 pcvs. 10,074 pcSome Tabulated XHIP Data for 12 Scorpii
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 243.06689507° ±0.68 mas | -24.80 ±1.00 mas/yr. |
| Declination: | -28.41720580° ±0.45 mas | -44.50 ±1.10 mas/yr. |
| Galactic Longitude: | 347.74506154° | -49.12 mas/yr. |
| Galactic Latitude: | 16.49731513° | -13.51 mas/yr. |
Parallax: 10.75 ± 0.80 mas
Spectrography
Spectral Type: B9 V 1982MSS...C03....0H.
Radial Velocity: -0.20 ±1.80 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
n/a
Photometry
band
magnitude
Abs. Mag.
U
B
5.68
0.85
V
5.67
0.84
R
I
5.75
0.92
J
H
K
B-V: +0.01 V-I: -0.08
Derivations
Heliocentric distance: 92.41 pc (7.4% margin of error)
Galactocentric distance: 7,313 pc
Transverse velocity: 22.3 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | 86.6 pc | -18.8 pc | 26.2 pc |
| Velocity (U, V, W) | -3.1 km/s | -21.3 km/s | -5.7 km/s |