Delta Aquarii
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 54m 39.0125s |
| Declination | −15° 49′ 14.953″ |
| Apparent magnitude (V) | 3.28 |
| Characteristics | |
| Spectral type | A3Vp |
| U−B color index | +0.08 |
| B−V color index | +0.05 |
| Astrometry | |
| Radial velocity (Rv) | +17.4±0.9 km/s |
| Proper motion (μ) | RA: −38.904 mas/yr Dec.: −33.027 mas/yr |
| Parallax (π) | 28.7936±0.7289 mas |
| Distance | 113 ± 3 ly (34.7 ± 0.9 pc) |
| Absolute magnitude (MV) | −0.17 |
| Details | |
| Mass | 3.19 M☉ |
| Radius | 4.16 R☉ |
| Luminosity | 100 L☉ |
| Surface gravity (log g) | 3.73 cgs |
| Temperature | 8,650 K |
| Metallicity [Fe/H] | –0.21 dex |
| Rotational velocity (v sin i) | 81 km/s |
| Age | 300 Myr |
| Other designations | |
| Skat, Scheat, 76 Aquarii, BD−16 6173, FK5 866, HD 216627, HIP 113136, HR 8709, SAO 165375 | |
| Database references | |
| SIMBAD | data |
Delta Aquarii is a binary star system in the constellation of Aquarius. Its identifier is a Bayer designation that is Latinized from δ Aquarii, and abbreviated Delta Aqr or δ Aqr, respectively. This system has the official name Skat, pronounced /ˈskæt/. It is the third-brightest star in Aquarius with an apparent visual magnitude of 3.3, and is readily visible to the naked eye at night. The distance to this system is about 113 light-years (35 parsecs) based upon parallax measurements. It is drifting further away from the Sun with a radial velocity of +17 km/s.