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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.
| Hipparcos astrometry for 257 stars using Tycho-2 data
We present improved Hipparcos astrometry for 257 Hipparcos stars,resolved into 342 components. For 64 of the stars no astrometry wasobtained in the Hipparcos Catalogue, while for the remaining starsadditional components have been added by this solution or the positionshave been revised considerably. We have used the published Hipparcostransit data for the new solutions, together with results from thesecond reduction of the Tycho data for defining better initial values.Based on observations made with the ESA Hipparcos astrometry satellite.Table 3 is only available in electronic form at the CDS via anonymousftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Yay |
| Sað Açýklýk: | 19h26m27.31s |
| Yükselim: | -13°07'54.9" |
| Görünürdeki Parlaklýk: | 9.704 |
| özdevim Sað Açýklýk: | 3.5 |
| özdevim Yükselim: | 2.4 |
| B-T magnitude: | 11.208 |
| V-T magnitude: | 9.829 |
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