HD_174569 Knowpia

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 edit

^ ^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