25 Scorpii, an orange bright giant star in Scorpius
25 Scorpii is an orange bright giant star in the constellation Scorpius. At 690 light years away, it shines at an apparent visual magnitude of 6.72.
25 Scorpii (HIP 82140)
25 Scorpii is an orange bright giant star in the constellation Scorpius. At 690 light years away, it shines at an apparent visual magnitude of 6.72. It is moving through the Galaxy at a speed of 15.3 km/s relative to the Sun. Its projected Galactic orbit carries it between 21,200 and 24,800 light years from the center of the Galaxy.
Sky position: RA 16h 46.9m, Dec -25° 31.8'
Common designations: 25 Scorpii, HIP 82140, HD 151179, HR 6225
Galactic Orbit of
25 Scorpii
(compared to the
Sun)
E
ccentricity: 8.0% vs. 16.0%Angle φ : 108.8°vs. 26.0°
Semi-major axis : 7,055 pc vs. 8,686 pc
Semi-minor axis: 7,032 pc vs. 8,574 pc
Focus-to-center
: 562 pcvs. 1,388 pcSemilatus rectum : 7,010 pc vs. 8,464 pc
Perigalacticon: 6,492 pc vs. 7,297 pc
Apogalacticon
: 7,617 pcvs. 10,074 pcSome Tabulated XHIP Data for 25 Scorpii
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 251.71394629° ±0.58 mas | -4.27 ±0.49 mas/yr. |
| Declination: | -25.52853617° ±0.39 mas | -14.49 ±0.41 mas/yr. |
| Galactic Longitude: | 355.25678636° | -13.99 mas/yr. |
| Galactic Latitude: | 12.64225159° | -5.72 mas/yr. |
Parallax: 4.62 ± 0.63 mas
Spectrography
Spectral Type: K0 II 1988MSS...C04....0H.
Radial Velocity: 2.00 ±4.40 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
n/a
Photometry
band
magnitude
Abs. Mag.
U
B
7.90
1.27
V
6.72
0.09
R
I
5.71
-0.92
J
4.75
-1.88
H
4.03
-2.60
K
3.91
-2.72
B-V: +1.18 V-I: +1.01
Derivations
Heliocentric distance: 211.73 pc (13.6% margin of error)
Galactocentric distance: 7,194 pc
Transverse velocity: 15.2 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | 205.9 pc | -17.1 pc | 46.3 pc |
| Velocity (U, V, W) | 2.0 km/s | -14.3 km/s | -5.2 km/s |