HD 174569

Last updated
HD 174569
Observation data
Epoch J2000       Equinox J2000
Constellation Aquila
Right ascension 18h 50m 45.5515s [1]
Declination +10° 58′ 34.9970″ [1]
Apparent magnitude  (V)6.36 [2]
Characteristics
Spectral type K5III + K3III-IV [3]
U−B color index +1.63 [2]
B−V color index +1.44 [2]
Astrometry
A
Radial velocity (Rv)−25.61±0.14 [4]  km/s
Proper motion (μ)RA: +8.168  mas/yr [4]
Dec.: +5.959  mas/yr [4]
Parallax (π)4.4674 ± 0.0200  mas [4]
Distance 730 ± 3  ly
(224 ± 1  pc)
B
Radial velocity (Rv)−27 [5]  km/s
Proper motion (μ)RA: +8.623  mas/yr [1]
Dec.: +6.146  mas/yr [1]
Parallax (π)4.4157 ± 0.0232  mas [6]
Distance 739 ± 4  ly
(226 ± 1  pc)
Details
A
Radius 28.33 [7]   R☉
Luminosity 204 [7]   L☉
Temperature 4,097 [7]   K
Other designations
BD+10° 3685, HD 174569, HIP 92475, HR 7099, SAO 104170.
Database references
SIMBAD data

HD 174569 is a spectroscopic binary [3] 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. [4] [6]

Both components are giant stars that exhausted their hydrogen supply. Star A has a class K5III, while star B has a class K3III-IV. [3]

References

  1. 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.
  2. 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
  3. 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
  4. 1 2 3 4 5 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.
  5. ↑ 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.
  6. 1 2 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.
  7. 1 2 3 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.
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