Theta Scorpii
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation | Scorpius |
| Right ascension | 17h 37m 19.1s |
| Declination | -42° 59′ 52″ |
| Apparent magnitude (V) | 1.86 |
| Spectral Characteristics | |
| Spectral type | F1 II |
| U-B color index | 0.22 |
| B-V color index | 0.40 |
| Variable type | ? |
| Astrometry | |
| Radial velocity (Rv) | 1 km/s |
| Proper motion (μ) | RA: 6.06 mas/yr Dec.: -0.95 mas/yr |
| Parallax (π) | 11.99 ± 0.84 mas |
| Distance | 270 ± 20 ly (83 ± 6 pc) |
| Absolute magnitude (MV) | -2.75 |
| Physical Characteristics | |
| Mass | 3.7 M☉ |
| Radius | 20 R☉ |
| Luminosity | 960 L☉ |
| Temperature | 7200 K |
| Metallicity | ? |
| Rotation | 105 km/s (10d) |
| Age | ? years |
| Other designations | |
Theta Scorpii (θ Sco / θ Scorpii) is a star in the constellation Scorpius. It also has the traditional names Sargas and Girtab, both of Sumerian origin.
θ Scorpii A is a yellow giant of spectral type F1 II shining with a luminosity of 960 times that of the Sun from a distance of 272 light years. The radius of this star is 20 solar radii and its surface temperature is 7200 kelvins. The mass of Sargas has been determined to be 3.7 times the solar mass.
