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Mining in the HIPPARCOS raw data
The Hipparcos solutions flagged as unreliable after the completion ofthe standard data processing have been systematically revisited in thelight of additional information, primarily related to theirmultiplicity. In many cases improved solutions have been obtained,yielding at the same time an Hipparcos based separation and positionangle and a better astrometric solution for the system. The principlesapplied in this reprocessing are explained and more than a hundred newsolutions with absolute and relative astrometry are presented anddiscussed. Tables 1 to 7 are also available in electronic form at theCDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html
| Maximum separations among cataloged binaries
The paper classifies many of the widest common-motion binaries listed inthe Aitken catalog and list 72 physical pairs with known photoelectricphotometry, 31 physical pairs without good photometry, and 27 opticalpairs. As a function of primary types, the physical systems have upperlimits to their separations that are exceeded by some of the opticalpairs. The fact that optical pairs occur with larger separations impliesthat the limits are real ones and not just catalog limitations. Thoselimits (in AU) are expressed by 2500 M1 exp 1.54 for B5-KO main-sequenceprimaries. The same limits hold for the Trapezium and hierarchicalsystems studied previously.
| Uz-Delphini / V369-CYGNI / LD36 / LD42
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Yunus |
| Sað Açýklýk: | 20h22m48.92s |
| Yükselim: | +13°20'12.3" |
| Görünürdeki Parlaklýk: | 8.45 |
| Uzaklýk: | 183.824 parsek |
| özdevim Sað Açýklýk: | 7 |
| özdevim Yükselim: | 8.7 |
| B-T magnitude: | 10.227 |
| V-T magnitude: | 8.597 |
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