HD 197911

HD 197911
Location of HD 197911 (circled)
Observation data
Epoch J2000[1]      Equinox J2000[1]
Constellation Cepheus
Right ascension 20h 43m 21.60554s
Declination +63° 12′ 32.8418″
Apparent magnitude (V) 7.669[2]
Characteristics
Spectral type B5[2]
B−V color index −0.01[1]
J−H color index −0.109[1]
J−K color index −0.107[1]
Astrometry
Radial velocity (Rv)−3.80±3.5 km/s
Proper motion (μ) RA: −13.478[3] mas/yr
Dec.: -3.025[3] mas/yr
Parallax (π)1.0802 ± 0.0214 mas[3]
Distance3,020 ± 60 ly
(930 ± 20 pc)
Details[2]
Mass6.320±0.316 M☉
Radius9.218±0.461 R☉
Other designations
AG+63° 1129, BD+62° 1854, Gaia DR3 2196984971452315392, GC 28915, HD 197911, HIP 102274, SAO 19003, PPM 22349, TIC 343565408, TYC 4250-1529-1, GSC 04250-01529, 2MASS J20432160+6312329[1]
Database references
SIMBADHD 197911

HD 197911 (HIP 102274) is a bluish-white hued star in the deep northern constellation of Cepheus, close to the border with Draco and Cygnus. With an apparent magnitude of 7.669, it is too faint to be seen by the naked eye under most conditions, but readily visible using binoculars.[4] The star is located some 3,020 light-years (930 parsecs) distant according to Gaia EDR3 parallax measurements, but is moving closer to the Solar System at a heliocentric radial velocity of −3.8±3.5 km/s.

The star appears close to the reflection nebula and H II region[5] Sh2-130, alongside the A0-type star HD 197809 and G5-type star SAO 18999,[6] though the latter two stars are located much closer to Earth at 469 ly (144 pc)[7] and 198 ly (61 pc),[8] respectively. The nebula itself is situated at a distance of 600 pc (2,000 ly).[6]

  1. ^ a b c d e Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Kervella2019 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference bino was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Sharpless1959 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference galaxymap was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference EDR3_197809 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference EDR3_18999 was invoked but never defined (see the help page).