Astronomy:HD 174569
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Short description: Star in the constellation Aquila
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[3] |
| U−B color index | +1.63[2] |
| B−V color index | +1.44[2] |
| Astrometry | |
| Radial velocity (Rv) | −23.7 km/s |
| Proper motion (μ) | RA: +7.92[1] mas/yr Dec.: +4.66[1] mas/yr |
| Parallax (π) | 2.59 ± 0.84[1] mas |
| Distance | approx. 1,300 ly (approx. 400 pc) |
| Other designations | |
| 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 Hipparcos, it is about 1,300 light-years (400 parsecs) away.[1]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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.
- ↑ 2.0 2.1 2.2 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
- ↑ 3.0 3.1 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
External links
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