Astronomy:HD 223311

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Short description: Star in the constellation Aquarius
HD 223311
Observation data
Equinox J2000.0]] (ICRS)
Constellation Aquarius[1]
Right ascension  23h 48m 32.47911s[2]
Declination −06° 22′ 49.5328″[2]
Apparent magnitude (V) 6.08[3]
Characteristics
Spectral type K4III[4]
U−B color index +1.71[3]
B−V color index +1.452[4]
Variable type suspected[5]
Astrometry
Radial velocity (Rv)−20.069±0.008[4] km/s
Proper motion (μ) RA: +0.01[6] mas/yr
Dec.: −19.04[6] mas/yr
Parallax (π)3.5950 ± 0.0884[2] mas
Distance910 ± 20 ly
(278 ± 7 pc)
Absolute magnitude (MV)−0.80[1]
Details
Mass5.0[7] M☉
Radius40.78+3.27
−7.51[2] R☉
Luminosity496±15[2] L☉
Surface gravity (log g)1.04[8] cgs
Temperature4,267+457
−162[2] K
Metallicity [Fe/H]−0.43[8] dex
Rotational velocity (v sin i)1.7[9] km/s
Age1.8[10] Gyr
Other designations
NSV 14715, BD−07°6086, FK5 3912, HD 223311, HIP 117420, HR 9014, SAO 146919[11]
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.[3] 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[12] star that is drifting closer to the Sun at the rate of −20 km/s.[4] The star is situated near the ecliptic and thus is subject to lunar occultations.[13]

This is an aging K-type giant star with a stellar classification of K4III.[4] Having exhausted the supply of hydrogen at its core, it has cooled and expanded off the main sequence. At present it has 41 times the girth of the Sun.[2] 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.[5] The star is radiating 496 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,267 K.[2]

References

  1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  3. ↑ 3.0 3.1 3.2 Johnson, H. L. et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99): 99, Bibcode: 1966CoLPL...4...99J. 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 Soubiran, C. et al. (April 2013), "The catalogue of radial velocity standard stars for Gaia. I. Pre-launch release", Astronomy & Astrophysics 552: 11, doi:10.1051/0004-6361/201220927, A64, Bibcode: 2013A&A...552A..64S. 
  5. ↑ 5.0 5.1 Samus, N. N. et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1 61 (1): 80–88, doi:10.1134/S1063772917010085, Bibcode: 2017ARep...61...80S. 
  6. ↑ 6.0 6.1 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V. 
  7. ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  8. ↑ 8.0 8.1 Matsuno, Tadafumi; Starkenburg, Else; Balbinot, Eduardo; Helmi, Amina (2024). "Improving metallicity estimates for very metal-poor stars in the Gaia DR3 GSP-Spec catalog". Astronomy and Astrophysics 685: A59. doi:10.1051/0004-6361/202245762. Bibcode: 2024A&A...685A..59M. 
  9. ↑ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars. V. Southern stars". Astronomy and Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. Bibcode: 2014A&A...561A.126D. 
  10. ↑ Huang, Yang; Beers, Timothy C.; Wolf, Christian; Lee, Young Sun; Onken, Christopher A.; Yuan, Haibo; Shank, Derek; Zhang, Huawei et al. (2022). "Beyond Spectroscopy. I. Metallicities, Distances, and Age Estimates for over 20 Million Stars from SMSS DR2 and Gaia EDR3". The Astrophysical Journal 925 (2): 164. doi:10.3847/1538-4357/ac21cb. Bibcode: 2022ApJ...925..164H. 
  11. ↑ "HD 223311". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+223311. 
  12. ↑ Crifo, F. et al. (December 2010), "Towards a new full-sky list of radial velocity standard stars", Astronomy and Astrophysics 524: 8, doi:10.1051/0004-6361/201015315, A10, Bibcode: 2010A&A...524A..10C. 
  13. ↑ Blow, G. L. et al. (November 1982), "Photoelectric observations of lunar occultations. XIII", Astronomical Journal 87: 1571–1584, doi:10.1086/113247, Bibcode: 1982AJ.....87.1571B. 



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