Hd 174569

HD 174569
Observation data; Epoch J2000 Equinox J2000
Constellation	Aquila
Right ascension	18h 50m 45.5515s
Declination	+10° 58′ 34.9970″
Apparent magnitude (V)	6.36
Characteristics
Spectral type	K5III
U−B color index	+1.63
B−V color index	+1.44
Astrometry
Radial velocity (Rv)	−23.7 km/s
Proper motion (μ)	RA: +7.92 mas/ yr ; Dec.: +4.66 mas/ yr
Parallax (π)	2.59 ± 0.84 mas
Distance	approx. 1,300 ly ; (approx. 400 pc)
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 Hipparcos, it is about 1,300 light-years (400 parsecs) away.^[1]

References

^ ^a ^b ^c ^d ^e ^f 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.
^ ^a ^b ^c 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
^ ^a ^b 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

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