HD 197036

HD 197036
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cygnus
Right ascension 20h 39m 23.1274s[1]
Declination +45° 40′ 00.9405″[1]
Apparent magnitude (V) 6.61±0.01[2]
Characteristics
Spectral type B5 IV[3]
U−B color index -0.59[4][2]
B−V color index −0.07[2]
Astrometry
Radial velocity (Rv)−15±2[5] km/s
Proper motion (μ) RA: +3.737 mas/yr[1]
Dec.: −1.586 mas/yr[1]
Parallax (π)2.4923 ± 0.0284 mas[1]
Distance1,310 ± 10 ly
(401 ± 5 pc)
Absolute magnitude (MV)−1.15[6]
Details
Mass4.21[7] M☉
Radius5.17[8] R☉
Luminosity379[6] L☉
Surface gravity (log g)3.52[7] cgs
Temperature13,399[9] K
Metallicity [Fe/H]−0.03[7] dex
Rotational velocity (v sin i)135[10] km/s
Other designations
BD+45°3233, GC 28793, HD 197036, HIP 101934, HR 7912, SAO 49898, GSC 03574-03107
Database references
SIMBADdata

HD 197036 is a single star in the northern constellation Cygnus. It has an absolute magnitude of −1.15[6] and an apparent magnitude of 6.61,[2] below the max naked eye visibility. Located 1,310 light years away, it is approaching Earth with a heliocentric radial velocity of −15 km/s.[5]

HD 197036 is a bluish white subgiant star of the spectral type B5IV, and has an angular diameter of 0.12 mas.[11] This yields a radius of 5.17 R☉[8] at its estimated distance. At present it has 4.21 times the mass of the Sun[7] and shines at 379 times the luminosity of the Sun[6] from its photosphere at an effective temperature of 13,399 K,[9] giving it a bluish white hue. Like many hot stars, it spins rapidly with a projected rotational velocity of 135 km/s−1[10] and has a near solar metallicity.[7]

  1. ^ a b c d Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Hog2000 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference RountreeL1968 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Reed2003 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Wilson1953 was invoked but never defined (see the help page).
  6. ^ a b c d 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 Anders2019 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Lang2006 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Abt2002 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Bourges2014 was invoked but never defined (see the help page).