HD 193472

HD 193472
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]
Distance282 ± 1 ly
(86.5 ± 0.4 pc)
Absolute magnitude (MV)+1.44[6]
Details
Mass1.61±0.25[7] M☉
Radius3.15±0.11[7] R☉
Luminosity23.9±0.9[7] L☉
Surface gravity (log g)3.65±0.08[7] cgs
Temperature7,188±114[7] K
Metallicity [Fe/H]+0.43±0.20[8] dex
Rotational velocity (v sin i)105[9] km/s
Age1.02+0.18
−0.16[10] Gyr
Other designations
AG+13°2095, BD+13°4360, GC 28275, HD 193472, HIP 100256, HR 7774, SAO 105974
Database references
SIMBADdata

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]

  1. ^ a b c d e Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Abt1995 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Mendoza1978 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Karchenko2007 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference ticv8 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference gaspar2016 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Royer2002 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference kunzli1998 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference DR2 was invoked but never defined (see the help page).