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HD 181361


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Photoelectric and CCD times of minima of 19 eclipsing binary systems
We present several photoelectric and unfiltered CCD minima observationsof 19 eclipsing binaries. Most of them are apsidal motion stars (or atleast candidate ones).

Photometric solutions and the rate of mass transfer in U Sagittae
Five-color intermediate-band photoelectric observations of the totallyeclipsing Algol binary U Sagittae were obtained from 1978 to 1985.Photometric solutions are made using WINK and the Wilson-Devineyprograms. The photometric mass ratio agrees well with the value foundrecently by Van Hamme and Wilson (1986). Small depressions in the lightcurves between phases 0.80 and 0.95 were produced by light extinction ina mass-transferring stream. A new method using the theory of streamstructure by Lubow and Shu (1975, 1976) is used to find M approximatelyequal to or less than 2x10 to the -7th solar mass per year. An attemptis made at a quantitative interpretation of small brightness changes ofthe cool star in this system.

Photometry of Comparison Stars
Not Available

Radius Variations in the Classical Algol Binary U-Sagittae
Abstract image available at:http://adsabs.harvard.edu/abs/1982PASP...94...70O

A photometric study of the eclipsing binary U Sge.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1976PASP...88..688M&db_key=AST

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Osservazione e dati astrometrici

Costellazione:Freccia
Ascensione retta:19h19m26.19s
Declinazione:+19°43'06.1"
Magnitudine apparente:8.197
Distanza:355.872 parsec
Moto proprio RA:-1.4
Moto proprio Dec:-5.8
B-T magnitude:8.29
V-T magnitude:8.205

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 181361
TYCHO-2 2000TYC 1607-173-1
USNO-A2.0USNO-A2 1050-13640884
HIPHIP 94959
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