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UBV photometry of wide visual double stars. V. Double stars with mainly K- and M- type primaries.
We present UBV photometric observations of 55 wide visual double starswith K- and M- type primaries. Our observations have been compared andcombined with information available in the literature. At least 58% ofthem are optical pairs.
| A photometric study of wide visual double stars. II - Common proper motion double stars
A total of 82 common proper motion wide visual double stars have beenobserved using the uvby, H-beta systems. MK class, color excess,absolute magnitude, effective temperature, and distance have beenderived from calibrations of the above systems. From the distancesderived here and the astrometric data, taken from the literature, it wasfound that the percentage of physical binaries among the common propermotion wide double stars is significantly higher than the samepercentage among the wide visual double stars with significant relativeproper motion, but there are a lot of optical pairs among them as well.
| A photometric study of wide visual double stars with significant relative proper motion
Photometric observations and uvby H-beta indices of 142 wide visualdouble stars are presented. Calibrations of the indices are used toderive MK class, color excess, absolute magnitude, effectivetemperature, and distance. The results are used to check candidatesdouble stars for the Hipparcos mission for opticity.
| Classification of 831 two-micron sky survey sources south of +5 degrees.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1975AJ.....80.1011H&db_key=AST
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Observation and Astrometry data
| Constellation: | いるか座 |
| Right ascension: | 20h34m47.13s |
| Declination: | +05°13'56.1" |
| Apparent magnitude: | 8.323 |
| Proper motion RA: | -1.9 |
| Proper motion Dec: | 1.8 |
| B-T magnitude: | 10.387 |
| V-T magnitude: | 8.494 |
Catalogs and designations:
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