Theta Volantis, Latinized from θ Volantis, is a solitary[9][10] star in the southern constellation of Volans. Based upon parallax measurements, is approximately 240 light years from the Sun. It has an apparent visual magnitude of 5.19,[2] which is bright enough to be faintly visible to the naked eye.
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Volans |
Right ascension | 08h 39m 05.16145s[1] |
Declination | −70° 23′ 12.2826″[1] |
Apparent magnitude (V) | 5.19[2] |
Characteristics | |
Spectral type | A0 V[3] |
U−B color index | −0.03[4] |
B−V color index | +0.01[4] |
Astrometry | |
Radial velocity (Rv) | 13.00±4.2[2] km/s |
Proper motion (μ) | RA: +19.15[1] mas/yr Dec.: −38.28[1] mas/yr |
Parallax (π) | 13.58 ± 0.20 mas[1] |
Distance | 240 ± 4 ly (74 ± 1 pc) |
Absolute magnitude (MV) | +1.21[5] |
Details | |
Mass | 2.3[6] M☉ |
Luminosity | 37[7] L☉ |
Surface gravity (log g) | 4.08[6] cgs |
Temperature | 8,753[7] K |
Rotational velocity (v sin i) | 98[6] km/s |
Age | 185−364[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Theta Volantis is an A-type main sequence star with a stellar classification of A0 V[3] and a mass around 2.3 times that of the Sun. It is a young star with an estimated age of a few hundred million years, and is spinning rapidly with a projected rotational velocity of 98 km/s.[6] Theta Volantis shines 37 times as brightly as the Sun, with an effective temperature of 8,753 K in its outer atmosphere.[7]
The star has two optical companions: a magnitude 15.0 star at an angular separation of 22.10″ along a position angle of 58°, and a magnitude 10.64 star at an angular separation of 41.3″ along a position angle of 105° (both as of 2000).[11]