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A catalogue of eclipsing variables
A new catalogue of 6330 eclipsing variable stars is presented. Thecatalogue was developed from the General Catalogue of Variable Stars(GCVS) and its textual remarks by including recently publishedinformation about classification of 843 systems and making correspondingcorrections of GCVS data. The catalogue1 represents thelargest list of eclipsing binaries classified from observations.
| IO Aqr: Twins just at turn off?
We present photometric and spectroscopic analysis of the eclipsingbinary IO Aqr with orbital period 2.37 °. The system is detached,with similar almost spherical components. The star is classified as G0spectral type. In the analysis we have used spectra obtained at a 2-mtelescope with a Coudé spectrograph for two regions NaD andHα, as well as ASAS I band photometry and R, Vphotometry obtained at a 0.4 m telescope. The model of the star wasobtained using a code based on the Wilson-Devinney method. The radii ofthe stars for our best fit are R1=2.09±0.13Rȯ and R2=2.54±0.06 Rȯwhile the masses of the components are M1=1.53±0.02Mȯ and M2=1.64±0.02Mȯ. Both components are slightly evolved main sequencestars.Based on spectroscopic observations collected at National AstronomicalObservatory Rozhen, Bulgaria and David Dunlop Observatory, Canada.
| Stars with the Largest Hipparcos Photometric Amplitudes
A list of the 2027 stars that have the largest photometric amplitudes inHipparcos Photometry shows that most variable stars are all Miras. Thepercentage of variable types change as a function of amplitude. Thiscompilation should also be of value to photometrists looking forrelatively unstudied, but large amplitude stars.
| The 74th Special Name-list of Variable Stars
We present the Name-list introducing GCVS names for 3153 variable starsdiscovered by the Hipparcos mission.
| Photoelectric Photometry of Stars in the Vilnius System in Kapteyn Areas SA:92 SA:108 and SA:112
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Observation and Astrometry data
| Constellation: | Aquarius |
| Right ascension: | 20h40m45.47s |
| Declination: | +00°56'21.0" |
| Apparent magnitude: | 8.865 |
| Distance: | 184.502 parsecs |
| Proper motion RA: | -3.7 |
| Proper motion Dec: | -23.2 |
| B-T magnitude: | 9.442 |
| V-T magnitude: | 8.913 |
Catalogs and designations:
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