HD 174569

Last updated
HD 174569
Observation data
Epoch J2000       Equinox J2000
Constellation Aquila [1]
Right ascension 18h 50m 45.5515s [2]
Declination +10° 58′ 34.997″ [2]
Apparent magnitude  (V)6.36 [3]
Characteristics
Spectral type K5III + K3III-IV [4]
U−B color index +1.63 [3]
B−V color index +1.44 [3]
Astrometry
A
Radial velocity (Rv)−25.61±0.14 [5] km/s
Proper motion (μ)RA: +8.168 mas/yr [5]
Dec.: +5.959 mas/yr [5]
Parallax (π)4.4674±0.0200  mas [5]
Distance 730 ± 3  ly
(224 ± 1  pc)
B
Radial velocity (Rv)−27 [6] km/s
Proper motion (μ)RA: +8.623  mas/yr [2]
Dec.: +6.146  mas/yr [2]
Parallax (π)4.4157 ± 0.0232  mas [7]
Distance 739 ± 4  ly
(226 ± 1  pc)
Details
A
Mass 1.2 [8]   M☉
Radius 37 [5]   R☉
Luminosity 318 [5]   L☉
Surface gravity (log g)1.52 [8]   cgs
Temperature 3,922 [8]   K
Metallicity [Fe/H]0.51 [8]   dex
B
Mass 1.4 [8]   M☉
Radius 18 [7]   R☉
Luminosity141 [7]   L☉
Surface gravity (log g)2.46 [8]   cgs
Temperature 4,808 [8]   K
Metallicity [Fe/H]−0.09 [8]   dex
Other designations
BD+10°3685, HD 174569, HIP 92475, HR 7099, SAO 104170.
Database references
SIMBAD data
A
B

HD 174569 is a spectroscopic binary [4] star system in the equatorial constellation of Aquila. Based on stellar parallax measurements by Gaia , it is about 730-740 light-years (400 parsecs) away. [5] [7]

Both components are giant stars that exhausted their hydrogen supply. Star A has a class K5III, while star B has a class K3III-IV. [4]

References

  1. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN   1562-6873. ISSN   1063-7737. S2CID   119257644.
  2. 1 2 3 4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv: 0708.1752 . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID   18759600.
  3. 1 2 3 Oja, T. (August 1991). "UBV photometry of stars whose positions are accurately known. VI". Astronomy and Astrophysics Supplement Series. 89 (2): 415–419. Bibcode:1991A&AS...89..415O.
  4. 1 2 3 Bidelman, William P. (April 1958). "Spectral Classification of Visual Binaries Having Primaries Above the Main Sequence". Publications of the Astronomical Society of the Pacific. 70 (413): 168. Bibcode:1958PASP...70..168B. doi: 10.1086/127203 .
  5. 1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  6. ↑ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR.
  7. 1 2 3 4 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  8. 1 2 3 4 5 6 7 8 Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardèvol, J.; Casamiquela, L.; Figueras, F.; Jiménez-Arranz, Ó.; Jordi, C.; Monguió, M.; Romero-Gómez, M.; Altamirano, D.; Antoja, T.; Assaad, R.; Cantat-Gaudin, T.; Castro-Ginard, A.; Enke, H.; Girardi, L.; Guiglion, G.; Khan, S.; Luri, X.; Miglio, A.; Minchev, I.; Ramos, P.; Santiago, B. X.; Steinmetz, M. (2022). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy and Astrophysics. 658: A91. arXiv: 2111.01860 . Bibcode:2022A&A...658A..91A. doi:10.1051/0004-6361/202142369.
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