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Delta Aquarii
Star in the constellation Aquarius / From Wikipedia, the free encyclopedia
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Delta Aquarii (δ Aquarii, abbreviated Delta Aqr, δ Aqr), officially named Skat /ˈskæt/,[16] is the third-brightest star in the constellation of Aquarius. The apparent visual magnitude is 3.3,[17] which can be seen with the naked eye. The distance to this star is about 113 light-years (35 parsecs) based upon parallax measurements, and it has a close companion.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquarius |
Right ascension | 22h 54m 39.0125s[1] |
Declination | −15° 49′ 14.953″[1] |
Apparent magnitude (V) | 3.28[2] |
Characteristics | |
Spectral type | A3Vp[3] |
U−B color index | +0.08[4] |
B−V color index | +0.05[4] |
Astrometry | |
Radial velocity (Rv) | +18.0[5] km/s |
Proper motion (μ) | RA: -38.904[6] mas/yr Dec.: -33.027[6] mas/yr |
Parallax (π) | 28.7936 ± 0.7289 mas[6] |
Distance | 113 ± 3 ly (34.7 ± 0.9 pc) |
Absolute magnitude (MV) | −0.17[7] |
Details | |
Mass | 2.51[8] M☉ |
Radius | 2.4[9] R☉ |
Luminosity | 48[6] L☉ |
Surface gravity (log g) | 3.73[10] cgs |
Temperature | 8,650[11] K |
Metallicity [Fe/H] | –0.21[12] dex |
Rotational velocity (v sin i) | 81[13] km/s |
Age | 0.3[14] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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