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Speckle interferometry of HIPPARCOS link stars. II
A second list is presented of stars that have been tested for theirsuitability as astrometric links between the Hipparcos satellite and theSpace Telescope. A speckle interferometer and autocorrelator were used,first on the 1.9-m telescope of the Mt. Stromlo and Siding SpringObservatories, and then, after discarding 16 stars showing evidence of abinary nature, on the Anglo-Australian 3.9-m telescope. Results aregiven for 123 stars. Combining the present list with the 1984 list, itis estimated that 29 percent of the original selection of 'cleanlooking' stars (on sky survey prints) are expected to be multiple at theresolution of the 3.9-m telescope, 0.03-0.7 arcsec.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Yilan |
| Sað Açýklýk: | 15h49m53.95s |
| Yükselim: | +02°47'42.9" |
| Görünürdeki Parlaklýk: | 8.313 |
| Uzaklýk: | 174.825 parsek |
| özdevim Sað Açýklýk: | -3.1 |
| özdevim Yükselim: | -19.2 |
| B-T magnitude: | 10.028 |
| V-T magnitude: | 8.455 |
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