HD 166473

HD 166473
Location of HD 166473 (circled)
Observation data
Epoch J2000.0[1]      Equinox J2000.0[1]
Constellation Corona Australis
Right ascension 18h 12m 25.83474s
Declination −37° 45′ 09.2713″
Apparent magnitude (V) 7.953[2]
Characteristics
Spectral type A5pSrCrEu[2]
B−V color index 0.42[3]
J−H color index -0.018[4]
J−K color index -0.026[4]
Variable type α2 CVn variable[2]
Astrometry
Radial velocity (Rv)−22.5±3.0 km/s
Proper motion (μ) RA: -2.767[1] mas/yr
Dec.: −12.785[1] mas/yr
Parallax (π)7.1672 ± 0.0337 mas[1]
Distance455 ± 2 ly
(139.5 ± 0.7 pc)
Absolute magnitude (MV)1.60,[5] 2.197[6]
Details[5]
Mass2.29 M☉
Radius2.25 R☉
Luminosity18.03 L☉, 9.811[6] L☉
Surface gravity (log g)4.00 cgs
Temperature7760 K
Rotation3836 ± 30 d
Age1.00 Gyr
Other designations
CD−37° 12303, CPD−37° 7956, Gaia DR2 4037543655114296576, HD 166473, PPM 749478, TIC 368866492, TYC 7900-2776-1, GSC 07900-02776, 2MASS J18122583-3745092, V694 CrA[4]
Database references
SIMBADdata

HD 166473 is a rapidly oscillating Ap star (roAp star) and an α2 CVn variable located about 455 light-years (140 parsecs) away in the southern constellation of Corona Australis. It has the variable star designation V694 Coronae Australis (sometimes abbreviated to V694 CrA). With an apparent magnitude of 7.953, it is too faint to be seen by the naked eye from Earth, but can be observed using binoculars.[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 Cite error: The named reference Bychkov2021 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference TYC2000 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference simbad was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Glagolevskij2019 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Scholz2019 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference bino was invoked but never defined (see the help page).