Delta Sculptoris
Triple star system in the constellation of Sculptor / From Wikipedia, the free encyclopedia
Delta Sculptoris (δ Scl, δ Sculptoris) is a triple star system[9] in the constellation Sculptor. It is approximately 137.4 light years from Earth.[1]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Sculptor |
Right ascension | 23h 48m 55.54658s[1] |
Declination | −28° 07′ 48.9745″[1] |
Apparent magnitude (V) | 4.57[2] |
Characteristics | |
Spectral type | A0Vp(Lam Boo)n[3] |
U−B color index | -0.03[2] |
B−V color index | +0.01[2] |
Astrometry | |
Radial velocity (Rv) | +8.70[4] km/s |
Proper motion (μ) | RA: +100.80[1] mas/yr Dec.: -105.34[1] mas/yr |
Parallax (π) | 23.73 ± 0.22 mas[1] |
Distance | 137 ± 1 ly (42.1 ± 0.4 pc) |
Absolute magnitude (MV) | 1.47[5] |
Details | |
Mass | 2.27[6] M☉ |
Radius | 1.8[7] R☉ |
Luminosity | 29[6] L☉ |
Surface gravity (log g) | 4.34[8] cgs |
Temperature | 9,750[6] K |
Rotational velocity (v sin i) | 299[6] km/s |
Other designations | |
Database references | |
SIMBAD | data |
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The primary component, Delta Sculptoris A, is a white A-type main sequence dwarf[3] with an apparent magnitude of +4.59. It has a faint, 11.6 magnitude companion, Delta Sculptoris B, 4 arcseconds, or more than 175 astronomical units, away from it. Orbiting this pair at the much greater separation of 74 arcseconds, is the yellow G-type Delta Sculptoris C, which has an apparent magnitude of +9.4.[9][10]
This system is a candidate member of the AB Doradus moving group, an association of stars with similar ages that share a common heading through space.[11]