Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Delphinus |
Right ascension | 20h 20m 00.1887s[1] |
Declination | +13° 32′ 53.1186″[1] |
Apparent magnitude (V) | 5.94±0.01[2] |
Characteristics | |
Spectral type | kA4 hF0 mF2[3] |
U−B color index | +0.12[4] |
B−V color index | +0.28[4] |
Astrometry | |
Radial velocity (Rv) | −8.00±1.78[5] km/s |
Proper motion (μ) | RA: −3.900 mas/yr[1] Dec.: −5.007 mas/yr[1] |
Parallax (π) | 11.5644 ± 0.0547 mas[1] |
Distance | 282 ± 1 ly (86.5 ± 0.4 pc) |
Absolute magnitude (MV) | +1.44[6] |
Details | |
Mass | 1.61±0.25[7] M☉ |
Radius | 3.15±0.11[7] R☉ |
Luminosity | 23.9±0.9[7] L☉ |
Surface gravity (log g) | 3.65±0.08[7] cgs |
Temperature | 7,188±114[7] K |
Metallicity [Fe/H] | +0.43±0.20[8] dex |
Rotational velocity (v sin i) | 105[9] km/s |
Age | 1.02+0.18 −0.16[10] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 193472 (HR 7774) is a solitary star in the equatorial constellation Delphinus. It has an apparent magnitude of 5.94,[2] making it visible with the naked eye if viewed under ideal conditions. Parallax measurements put it at a distance of 282 light years[1] and has a radial velocity of −8 km/s,[5] indicating that the object drifting towards the Solar System.
HD 193472 has a stellar classification of kA4 hF0 mF2,[3] indicating that its an Am star with the calcium K-line of an A4 star, the hydrogen lines and effective temperature of a F0 star, and the metallic lines of a F2 star. Due to a radius over three times that of the Sun and a relatively low surface gravity, it appears to be slightly evolved. HD 193472 has 161% the mass of the Sun and shines at 24 times the luminosity of the Sun[11] from its photosphere at an effective temperature of 7,188 K, giving it a yellowish white glow. HD 193472 has a projected rotational velocity of 105 km/s.[9]