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The Minima of the Eclipsing Binary System Y Cyg
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| Prelimary Photoelectric Light Curve for DHK29=SAO 70629
The newly discovered eclipsing binary star DHK 29 = SAO 70629 has beenobserved photoelectrically from October 1992 to October 1993. With thelight curve coverage 75% complete, it is apparent that the initial1.9-day period reported in IB VS 3815 is the half-period. Three times ofprimary minima have been determined. New light elements are given.
| The S201 far-ultraviolet imaging survey. II - A field in Cygnus
Far-ultraviolet imagery of a region in Cygnus, a 20 deg diameter fieldcentered near (1950) R. A. 21 h 31.2 m decl. +37 deg 25 arcmin, wasobtained by the S201 far-ultraviolet camera during the Apollo 16mission. In a 10 minute exposure covering the 1250-1600 A wavelengthrange (effective wavelength 1400 A), 730 star images can be detected,corresponding to a limiting ultraviolet magnitude of about m (1400) =10. Assuming nominal interstellar extinction values in this region nearthe galactic plane, this result corresponds to the detection of A0 Vstars to a distance of 300 pc and of B0 V stars to 1500 pc.Uncertainties in spectral classification and interstellar extinction forindividual objects are probably more significant than calibration ormeasurement errors. Most of the objects detected are identified withstars in the Smithsonian Astrophysical Observatory Star Catalog (1966),or the Catalog of Stellar Identifications (1979) or both, but 87 objectsremain unidentified (or are identified with late-type stars).
| Y Cygni - Photometry and apsidal motion
Abstract image available at:http://adsabs.harvard.edu/abs/1980PASP...92..782G
| Photoelectric observations of CY Cygni (1959 - 1961).
Abstract image available at:http://adsabs.harvard.edu/abs/1972A&A....20..201H
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Membre dels grups següents:
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Dades d'Observació i Astrometria
| Constel·lació: | Cygnus |
| Ascensió Recta: | 20h53m03.49s |
| Declinació: | +34°45'07.6" |
| Magnitud Aparent: | 7.94 |
| Distancia: | 529.101 parsecs |
| Moviment propi RA: | 2.6 |
| Moviment propi Dec: | -1.5 |
| B-T magnitude: | 7.867 |
| V-T magnitude: | 7.934 |
Catàlegs i designacions:
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