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The position of θ Scorpii in the Scorpius constellation. |
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| Observation data Epoch J2000 Equinox J2000 |
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|---|---|
| Constellation | Scorpius |
| Right ascension | 17h 37m 19.1s |
| Declination | -42° 59′ 52″ |
| Apparent magnitude (V) | 1.86 |
| 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 |
| Details | |
| 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 has the traditional name Sargas, 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.
In Chinese, it is referred to as 尾宿五 (Mandarin: wěi xiù wǔ), the Fifth Star of the Tail.
Sargas appears on the flag of Brazil, symbolising the state of Alagoas.[1]
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