Chi Scorpii, an orange giant star in Scorpius
Chi Scorpii is an orange giant star in the constellation Scorpius. At 377 light years away, it shines at an apparent visual magnitude of 5.24.
Chi Scorpii (HIP 79540)
Chi Scorpii is an orange giant star in the constellation Scorpius. At 377 light years away, it shines at an apparent visual magnitude of 5.24. The iron abundance of Chi Scorpii is -0.03 (93.3% of the Sun). It is moving through the Galaxy at a speed of 24.4 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,600 and 27,200 light years from the center of the Galaxy. It will come closest to the Sun 4.5 million years from now when it will brighten to magnitude 2.26 from a distance of 96 light years.
Sky position: RA 16h 13.8m, Dec -11° 50.4'
Common designations: Chi Scorpii, 17 Scorpii, HIP 79540, HD 145897, HR 6048
Vistas of Many Worlds
An engaging romp through the Galaxy!
Brightest stars in Scorpius:
(list all)
| Rank | Mag. | Star |
| 36 | 4.88 | HR 6682 |
| 37 | 4.90 | Beta-2 Scorpii |
| 38 | 4.93 | Psi Scorpii |
| 39 | 4.96 | HR 5969 |
| 40 | 5.03 | HR 6316 |
| 41 | 5.06 | HR 6371 |
| 42 | 5.09 | HR 6017 |
| 43 | 5.10 | HR 6460 |
| 44 | 5.23 | HR 6245 |
45
| 5.24
) Chi Scorpii
| Rank | Mag. | Star |
| 46 | 5.31 | HR 6142 |
| 47 | 5.35 | HR 6001 |
| 48 | 5.37 | Gliese 620.1 A |
| 49 | 5.38 | HR 5906 |
| 50 | 5.40 | HD 147722 |
| 51 | 5.41 | HR 5907 |
| 52 | 5.42 | HR 6100 |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Chi Scorpii
(compared to the Sun)
E
ccentricity: 7.1% vs. 16.0%Angle φ : -26.2°vs. 26.0°
Semi-major axis : 7,798 pc vs. 8,686 pc
Semi-minor axis: 7,779 pc vs. 8,574 pc
Focus-to-center
: 550 pcvs. 1,388 pcSemilatus rectum : 7,759 pc vs. 8,464 pc
Perigalacticon: 7,248 pc vs. 7,297 pc
Apogalacticon
: 8,349 pcvs. 10,074 pcSome Tabulated XHIP Data for Chi Scorpii
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 243.46211877° ±0.32 mas | -4.90 ±0.34 mas/yr. |
| Declination: | -11.83772219° ±0.26 mas | -10.14 ±0.33 mas/yr. |
| Galactic Longitude: | 1.30269374° | -10.96 mas/yr. |
| Galactic Latitude: | 27.34303232° | -2.62 mas/yr. |
Parallax: 8.62 ± 0.35 mas
Spectrography
Spectral Type: K3 III 1999MSS...C05....0H.
Radial Velocity: -23.61 ±0.10 km/s [A rating] 2002ApJS..141..503N.
Iron Abundance [Fe/H]:
-0.03 ±0.04 dex
2007A&A...475.1003H, 1990ApJS...74.1075M.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 6.63 | 1.32 |
| V | 5.24 | -0.08 |
| R | ||
| I | 4.03 | -1.29 |
| J | 2.94 | -2.38 |
| H | 2.27 | -3.05 |
| K | 2.09 | -3.22 |
B-V: +1.39 V-I: +1.21
Derivations
Heliocentric distance: 115.78 pc (4.1% margin of error)
Galactocentric distance: 7,297 pc
Transverse velocity: 6.2 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | 102.8 pc | 2.3 pc | 53.2 pc |
| Velocity (U, V, W) | -20.2 km/s | -6.5 km/s | -12.1 km/s |