Alpha Sculptoris
 Location of α Sculptoris (circled) |
|
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Sculptor |
| Right ascension | 00h 58m 36.35930s |
| Declination | −29° 21′ 26.8247″ |
| Apparent magnitude (V) | +4.30 |
| Characteristics | |
| Spectral type | B7 IIIp |
| U−B color index | −0.515 |
| B−V color index | −0.155 |
| Variable type | SX Ari |
| Astrometry | |
| Radial velocity (Rv) | +10.2 km/s |
| Proper motion (μ) |
RA: +20.13 mas/yr Dec.: +5.31 mas/yr |
| Parallax (π) | 4.20 ± 0.18mas |
| Distance | 780 ± 30 ly (240 ± 10 pc) |
| Details | |
| Mass | 5.01 M☉ |
| Radius | 7.52 R☉ |
| Luminosity | 1,549 L☉ |
| Surface gravity (log g) | 3.20 cgs |
| Temperature | 13,600 K |
| Metallicity [Fe/H] | 0.90 dex |
| Rotational velocity (v sin i) | 17 km/s |
| Age | 93 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Alpha Sculptoris (α Scl, α Sculptoris) is the Bayer designation for a star in the southern constellation of Sculptor. It has an apparent visual magnitude of +4.30, which makes it the brightest star in this generally faint constellation. Parallax measurements collected during the Hipparcos mission provide a distance estimate for this star, placing it at roughly 780 light-years (240 parsecs), with a 4% margin of error.
Alpha Sculptoris is a blue-white B-type giant. It is classified as an SX Arietis type variable star and its magnitude varies by less than a tenth of a magnitude.
The luminosity of α Scl is around 1,500 times that of the Sun while its surface temperature is 13,600 K. The radius of Alpha Sculptoris is calculated to be seven times solar while its mass is five times that of the Sun.
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