Astronomy:HD 199223

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Short description: Double star in the constellation Delphinus.
HD 199223
Delphinus constellation map.svg
Red circle.svg
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
A
Right ascension  20h 55m 40.6778s[1]
Declination +04° 31′ 57.7994″[1]
Apparent magnitude (V) 6.34±0.01[2]
B
Right ascension  20h 55m 40.5439s[3]
Declination +04° 31′ 58.2271″[3]
Apparent magnitude (V) 7.49±0.01[2]
Characteristics
A
Spectral type G8 III/IV[4]
U−B color index +0.49[5]
B−V color index +0.82[5]
B
Spectral type F/G[6]
Astrometry
Radial velocity (Rv)−32.6±0.4[7] km/s
Absolute magnitude (MV)+0.33[8]
A
Proper motion (μ) RA: +60.413[1] mas/yr
Dec.: +10.949[1] mas/yr
Parallax (π)9.2067 ± 0.0354[1] mas
Distance354 ± 1 ly
(108.6 ± 0.4 pc)
B
Proper motion (μ) RA: +60.315[3] mas/yr
Dec.: +9.758[3] mas/yr
Parallax (π)9.0757 ± 0.0758[3] mas
Distance359 ± 3 ly
(110.2 ± 0.9 pc)
Details
A
Mass1.25[9] M☉
Radius8.26+0.65−0.22[10] R☉
Luminosity37.1±0.4[10] L☉
Surface gravity (log g)2.60±0.25[11] cgs
Temperature4,956+68−185[10] K
Metallicity [Fe/H]0.13±0.09[11] dex
Rotational velocity (v sin i)<1[12] km/s
B
Mass1.46[9] M☉
Radius2.10+0.16−0.27[13] R☉
Luminosity8.82±0.23[13] L☉
Surface gravity (log g)3.85[9] cgs
Temperature6,865+494−251[13] K
Metallicity [Fe/H]−0.2[9] dex
Other designations
BD+03°4461, GC 29200, HD 199223, HIP 103301, HR 8010, SAO 126373, WDS J20557+0432[14]
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.[15] The components have a separation of 2″ at a position angle of 282° as of 2016.[16] 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,[4] indicating that it is a G-type star with the blended luminosity class of a giant star and a subgiant. It has 125% of the mass of the Sun[9] and an enlarged radius of 8.26 R☉.[10] It shines at 37.1 times the luminosity of the Sun[10] from its photosphere at an effective temperature of 4,956 K,[10] giving it a yellow glow. HD 199223A's iron abundance is 135% that of the Sun[11] and it spins modestly with a projected rotational velocity less than 1 km/s.[12]

As for the dimmer one, it is classified as an F/G star,[6] and is calculated to be an F-type subgiant. It has 146% of the mass of the Sun[9] and 2.1 times its radius.[13] It radiates with a luminosity of 8.82 solar luminosity[13] from its photosphere at an effective temperature of 6,865 K,[13] giving it a yellow white glow.

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 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. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  4. ↑ 4.0 4.1 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. 
  5. ↑ 5.0 5.1 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. 
  6. ↑ 6.0 6.1 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. 
  7. ↑ 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. 
  8. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation" (in en). Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A. 
  9. ↑ 9.0 9.1 9.2 9.3 9.4 9.5 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. 
  10. ↑ 10.0 10.1 10.2 10.3 10.4 10.5 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.
  11. ↑ 11.0 11.1 11.2 Randich, S.; Gratton, R.; Pallavicini, R.; Pasquini, L.; Carretta, E. (August 1999). "Lithium in population I subgiants". Astronomy and Astrophysics 348: 487–500. ISSN 0004-6361. Bibcode: 1999A&A...348..487R. 
  12. ↑ 12.0 12.1 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. 
  13. ↑ 13.0 13.1 13.2 13.3 13.4 13.5 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.
  14. ↑ 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. 
  15. ↑ 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. 
  16. ↑ 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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