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Solitary star in the constellation Sextans From Wikipedia, the free encyclopedia
Delta Sextantis (δ Sex, δ Sextantis) is a solitary[11] star in the equatorial constellation of Sextans. With an annual parallax shift of 10.13 mas,[1] it lies at a distance of around 322 light years from the Sun. This star is faintly visible to the naked eye, having an apparent visual magnitude of +5.25.[2] According to the Bortle scale, that means it can be viewed from dark suburban skies.
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Sextans |
Right ascension | 10h 29m 28.70222s[1] |
Declination | −02° 44′ 20.6862″[1] |
Apparent magnitude (V) | +5.25[2] |
Characteristics | |
Spectral type | B9.5 V[3] |
U−B color index | −0.12[2] |
B−V color index | −0.04[2] |
Astrometry | |
Radial velocity (Rv) | 18.07±0.96[4] km/s |
Proper motion (μ) | RA: −48.86[1] mas/yr Dec.: −13.43[1] mas/yr |
Parallax (π) | 10.13 ± 0.23 mas[1] |
Distance | 322 ± 7 ly (99 ± 2 pc) |
Absolute magnitude (MV) | +0.22[5] |
Details | |
Mass | 2.58[6] M☉ |
Radius | 2.3[7] R☉ |
Luminosity | 82[8] L☉ |
Surface gravity (log g) | 3.99±0.14[6] cgs |
Temperature | 10,899±371[6] K |
Metallicity [Fe/H] | −0.51[3] dex |
Rotational velocity (v sin i) | 152[9] km/s |
Age | 146[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
This is a B-type main sequence star with a stellar classification of B9.5 V;[3] just shy of being a cooler A-type star. It is estimated to have 2.6[6] times the Sun's mass and 2.3[7] times the radius of the Sun. It is 146[6] million years old, with a projected rotational velocity of 152[9] km/s. The star radiates 82[8] times the solar luminosity from its outer atmosphere at an effective temperature of 10,899 K.[6]
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