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HD 173910

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A Photometric Analysis of the Binary System KO Aquilae We report photometric uvbyoi observations of the variable KO Aqlobtained during the summer of 1993. One time of primary minima wasobserved, and improved quadratic and linear ephemerides were calculated.Eclipse timings of KO Aql, spanning over a sixty year interval, showthat the system is undergoing a period increase of 1.7 (+- 0.1) X 10^-8days/cycle. Analysis of our photometry with the new Wilson eclipsingbinary computer program indicates that the mass ratio of the system is0.29 and that the secondary star is cooler than the previouslydetermined G0 spectral type. The masses and radii of the two componentsare also estimated. (SECTION: Stars)
I.A.U. archives of unpublished observations of variable stars : 1978-79data. Not Available
A photoelectric study of the eclipsing binary system KO Aql. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1979PASJ...31..271H&db_key=AST
The Eclipsing Binary System KO Aquilae Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974PASP...86..187B&db_key=AST

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Osservazione e dati astrometrici

Costellazione:	Aquila
Ascensione retta:	18^h47^m29.42^s
Declinazione:	+11Â°10'57.4"
Magnitudine apparente:	9.126
Moto proprio RA:	-1.2
Moto proprio Dec:	-8
B-T magnitude:	9.342
V-T magnitude:	9.144

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 173910
TYCHO-2 2000	TYC 1030-4193-1
USNO-A2.0	USNO-A2 0975-13099893

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