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The nature of visual components in 82 multiple systems.
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| MSC - a catalogue of physical multiple stars
The MSC catalogue contains data on 612 physical multiple stars ofmultiplicity 3 to 7 which are hierarchical with few exceptions. Orbitalperiods, angular separations and mass ratios are estimated for eachsub-system. Orbital elements are given when available. The catalogue canbe accessed through CDS (Strasbourg). Half of the systems are within 100pc from the Sun. The comparison of the periods of close and widesub-systems reveals that there is no preferred period ratio and allpossible combinations of periods are found. The distribution of thelogarithms of short periods is bimodal, probably due to observationalselection. In 82\% of triple stars the close sub-system is related tothe primary of a wide pair. However, the analysis of mass ratiodistribution gives some support to the idea that component masses areindependently selected from the Salpeter mass function. Orbits of wideand close sub-systems are not always coplanar, although thecorresponding orbital angular momentum vectors do show a weak tendencyof alignment. Some observational programs based on the MSC aresuggested. Tables 2 and 3 are only 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
| A preliminary compilation of DS-programme star positions
A catalog is presented of the double-star-program (DS-program) starpositions, listing right ascensions for 930 DSs and declinations for1225 DSs of the program. The positions were compiled from the observedvalues obtained between 1980 and 1987 with the meridian circles of sixUSSR observatories (the Moscow, Kazan', Kiev, Khar'kov, Odessa, andTashkent Observatories) and the Belgrade Observatory. The measurementsand the treatment of the observational material were performed using therelative method, and the FK-4 system stars were used as reference stars.
| Mesures photométriques d'étoiles doubles serrées selon la méthode de P. Muller
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| Photometrie de la comete Arend-Roland.
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| Mesures d'Etoiles Doubles faites à Strasbourg en 1948-50
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| Takýmyýldýz: | Zurafa |
| Sað Açýklýk: | 07h47m00.42s |
| Yükselim: | +64°03'06.9" |
| Görünürdeki Parlaklýk: | 7.009 |
| Uzaklýk: | 173.31 parsek |
| özdevim Sað Açýklýk: | -14.9 |
| özdevim Yükselim: | -36.7 |
| B-T magnitude: | 7.095 |
| V-T magnitude: | 7.017 |
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