Astronomy:HD 174569
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Short description: Binary star in the constellation Aquila
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[5] mas/yr Dec.: +5.959[5] mas/yr |
| Parallax (π) | 4.4674 ± 0.0200[5] mas |
| Distance | 730 ± 3 ly (224 ± 1 pc) |
| B | |
| Radial velocity (Rv) | −27[6] km/s |
| Proper motion (μ) | RA: +8.623 mas/yr Dec.: +6.146 mas/yr |
| Parallax (π) | 4.4157 ± 0.0232[7] mas |
| 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☉ |
| Luminosity | 141[7] L☉ |
| Surface gravity (log g) | 2.46[8] cgs |
| Temperature | 4,808[8] K |
| Other designations | |
| 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
- ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A.
- ↑ 2.0 2.1 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.
- ↑ 3.0 3.1 3.2 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.
- ↑ 4.0 4.1 4.2 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. doi:10.1086/127203. Bibcode: 1958PASP...70..168B.
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 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.
- ↑ 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.
- ↑ 7.0 7.1 7.2 7.3 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.
- ↑ 8.0 8.1 8.2 8.3 8.4 8.5 8.6 Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardèvol, J.; Casamiquela, L.; Figueras, F.; Jiménez-Arranz, Ó. et al. (2022). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy and Astrophysics 658: A91. doi:10.1051/0004-6361/202142369. Bibcode: 2022A&A...658A..91A.
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