Delta Sculptoris
Triple star system in the constellation of Sculptor
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Delta Sculptoris (δ Scl, δ Sculptoris) is a triple star system[8] in the constellation Sculptor. It is approximately 137.4 light years from Earth.[2]
 | |
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Sculptor[1] |
| Right ascension | 23h 48m 55.54658s[2] |
| Declination | −28° 07′ 48.9745″[2] |
| Apparent magnitude (V) | 4.57[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4] |
| Spectral type | A0Vp(Lam Boo)n[5] |
| U−B color index | −0.03[3] |
| B−V color index | +0.01[3] |
| Astrometry | |
| Radial velocity (Rv) | +8.70[6] km/s |
| Proper motion (μ) | RA: +100.80[2] mas/yr Dec.: −105.34[2] mas/yr |
| Parallax (π) | 23.73±0.22 mas[2] |
| Distance | 137 ± 1 ly (42.1 ± 0.4 pc) |
| Absolute magnitude (MV) | +1.47[1] |
| Details[7] | |
| Mass | 2.19+0.09 −0.13 M☉ |
| Radius | 1.85[a] R☉ |
| Luminosity | 30.09+3.46 −3.00 L☉ |
| Surface gravity (log g) | 4.22±0.04 cgs |
| Temperature | 9,930±199 K |
| Metallicity [Fe/H] | −0.14+0.11 −0.18 dex |
| Rotational velocity (v sin i) | 299[4] km/s |
| Other designations | |
| ADS 17021, CCDM J23489-2808AB, CD−28°18353, FK5 896, GC 33050, GSC 06988-01337, HD 223340/223352, HIP 117452, HR 9016, SAO 192167, WDS J23489-2808AB | |
| Database references | |
| SIMBAD | data |
The primary component, Delta Sculptoris A, is a white A-type main-sequence[5] and Lambda Boötis star[7] with an apparent magnitude of +4.59. It has a faint, magnitude 11.6 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 G-type Delta Sculptoris C, which has an apparent magnitude of +9.4.[8][9]
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.[10]
Notes
- Calculated, using the Stefan-Boltzmann law and the star's effective temperature and luminosity, with respect to the solar nominal effective temperature of 5,772 K:
