HD 223311

HD 223311
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 23h 48m 32.47911s[1]
Declination −06° 22′ 49.5328″[1]
Apparent magnitude (V) 6.08[2]
Characteristics
Spectral type K4III[3]
U−B color index +1.71[2]
B−V color index +1.452[3]
Variable type suspected[4]
Astrometry
Radial velocity (Rv)−20.069±0.008[3] km/s
Proper motion (μ) RA: +0.01[5] mas/yr
Dec.: −19.04[5] mas/yr
Parallax (π)3.5950 ± 0.0884 mas[1]
Distance910 ± 20 ly
(278 ± 7 pc)
Absolute magnitude (MV)−0.80[6]
Details
Radius40.78+3.27
−7.51[1] R☉
Luminosity496±15[1] L☉
Temperature4,267+457
−162[1] K
Metallicity [Fe/H]−0.22±0.09[7] dex
Other designations
NSV 14715, BD−07°6086, FK5 3912, HD 223311, HIP 117420, HR 9014, SAO 146919[8]
Database references
SIMBADdata

HD 223311 is a star in the equatorial constellation of Aquarius. It has an orange hue and is visible to the naked eye as a dim star with an apparent visual magnitude of 6.08.[2] Based on parallax measurements, the star is located at a distance of approximately 910 light years from the Sun. It is a radial velocity standard[9] star that is drifting closer to the Sun at the rate of −20 km/s.[3] The star is situated near the ecliptic and thus is subject to lunar occultations.[10]

This is an aging K-type giant star with a stellar classification of K4III.[3] Having exhausted the supply of hydrogen at its core, it has cooled and expanded off the main sequence. At present it has 41[1] times the girth of the Sun. It is a suspected variable star of unknown type that has been measured ranging in brightness from magnitude 5.01 down to 5.26 in the infrared I band.[4] The star is radiating 496 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,267 K.[1]

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference aa552_A64 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference vanLeeuwen2007 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. ^ Cite error: The named reference aas134_523 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Crifo2010 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Blow1982 was invoked but never defined (see the help page).