Astronomy:HD 199223

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Short description: Double star in the constellation Delphinus
HD 199223
Location of HD 199223 (circled)
Observation data
{{#ifeq:J2000|J2000.0 (ICRS)|Epoch J2000.0      Equinox J2000.0 (ICRS)| Epoch J2000      [[Astronomy:Equinox (celestial coordinates)|Equinox J2000}}
Constellation Delphinus[1]
A
Right ascension  20h 55m 40.6778s[2]
Declination +04° 31′ 57.799″[2]
Apparent magnitude (V) 6.34±0.01[3]
B
Right ascension  20h 55m 40.5439s[4]
Declination +04° 31′ 58.227″[4]
Apparent magnitude (V) 7.49±0.01[3]
Characteristics
A
Evolutionary stage red giant branch[2]
Spectral type G8 III/IV[5]
U−B color index +0.49[6]
B−V color index +0.82[6]
B
Spectral type F/G[7]
Astrometry
Radial velocity (Rv)−32.6±0.4[8] km/s
Absolute magnitude (MV)+0.33[1]
A
Proper motion (μ) RA: +60.413[2] mas/yr
Dec.: +10.949[2] mas/yr
Parallax (π)9.2067 ± 0.0354[2] mas
Distance354 ± 1 ly
(108.6 ± 0.4 pc)
B
Proper motion (μ) RA: +60.315[4] mas/yr
Dec.: +9.758[4] mas/yr
Parallax (π)9.0757 ± 0.0758[4] mas
Distance359 ± 3 ly
(110.2 ± 0.9 pc)
Details
A
Mass1.63[9] M☉
Radius7.71[10] R☉
Luminosity36.5[2] L☉
Surface gravity (log g)2.75[9] cgs
Temperature4,830[2] K
Metallicity [Fe/H]0.16[9] dex
Rotational velocity (v sin i)<1[11] km/s
Age557[2] Myr
B
Mass1.36[10] M☉
Radius2.32[10] R☉
Luminosity9.04[10] L☉
Surface gravity (log g)3.84[10] cgs
Temperature6,572[10] K
Metallicity [Fe/H]−0.2[12] dex
Other designations
BD+03°4461, GC 29200, HD 199223, HIP 103301, HR 8010, SAO 126373, WDS J20557+0432[13]
Database references
SIMBADThe system
A
B

HD 199223 (HR 8010) is a double star in the equatorial constellation Delphinus. However, the system was originally in Equuleus prior to the creation of official IAU constellation borders.[14] The components have a separation of 2″ at a position angle of 282° as of 2016.[15] They have apparent magnitudes of 6.34 and 7.49 and distances of 354 and 359 light years respectively. The system is drifting closer with a radial velocity of −33 km/s.

The brighter component has a stellar classification of G8 III/IV,[5] indicating that it is a G-type star with the blended luminosity class of a giant star and a subgiant. It has 163% of the mass of the Sun[9] and an enlarged radius of 7.71 R☉.[10] It shines at 36.5 times the luminosity of the Sun[2] from its photosphere at an effective temperature of 4,830 K,[2] giving it a yellow glow. HD 199223A's iron abundance is 135% that of the Sun[9] and it spins modestly with a projected rotational velocity less than 1 km/s.[11]

As for the dimmer one, it is classified as an F/G star,[7] and is calculated to be an F-type subgiant.[citation needed] It has 136% of the mass of the Sun and 2.3 times its radius.[10] It radiates with a luminosity of 9.04 L☉ from its photosphere at an effective temperature of 6,572 K,[10] giving it a yellow white glow.

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  XHIP record for this object at VizieR.
  2. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 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.
  3. ↑ 3.0 3.1 Fabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (March 2002). "The Tycho double star catalogue". Astronomy & Astrophysics 384 (1): 180–189. doi:10.1051/0004-6361:20011822. ISSN 0004-6361. Bibcode: 2002A&A...384..180F. 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 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.
  5. ↑ 5.0 5.1 Harlan, E. A. (June 1974). "MK classifications for F-and G-type stars. 3.". The Astronomical Journal 79: 682. doi:10.1086/111597. ISSN 0004-6256. Bibcode: 1974AJ.....79..682H. 
  6. ↑ 6.0 6.1 Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory 4: 99–110. Bibcode: 1966CoLPL...4...99J. 
  7. ↑ 7.0 7.1 Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey 5: 0. Bibcode: 1999MSS...C05....0H. 
  8. ↑ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G. 
  9. ↑ 9.0 9.1 9.2 9.3 9.4 Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G. et al. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics 691: A98. doi:10.1051/0004-6361/202451427. Bibcode: 2024A&A...691A..98K. 
  10. ↑ 10.0 10.1 10.2 10.3 10.4 10.5 10.6 10.7 10.8 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  11. ↑ 11.0 11.1 de Medeiros, J. R.; Mayor, M. (November 1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series 139 (3): 433–460. doi:10.1051/aas:1999401. ISSN 0365-0138. Bibcode: 1999A&AS..139..433D. 
  12. ↑ Anders, F. et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics 628: A94. doi:10.1051/0004-6361/201935765. ISSN 0004-6361. Bibcode: 2019A&A...628A..94A. 
  13. ↑ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino 1. Bibcode: 1879RNAO....1.....G. 
  14. ↑ Davenhall, A. C.; Leggett, S. K. (May 1997). "VizieR Online Data Catalog: Constellation Boundary Data (Davenhall+ 1989)". VizieR Online Data Catalog: VI/49. Bibcode: 1997yCat.6049....0D. 
  15. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal 122 (6): 3466–3471. doi:10.1086/323920. ISSN 0004-6256. Bibcode: 2001AJ....122.3466M. 



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