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The Pul-3 catalogue of 58483 stars in the Tycho-2 system
A catalogue of positions and proper motions of 58483 stars (Pul-3) hasbeen constructed at the Pulkovo observatory. The Pul-3 is based on theresults of measurements of photographic plates with galaxies (Deutsch'splan). All plates were taken using the Pulkovo Normal Astrograph (thefirst epoch is in the 1950s and the second epoch is in the 1970s).The Pul-3 catalogue contains stars of mainly 12 to 16.5 mag in 146fields with galaxies in the declination zone from -5o to+85o. The Tycho-2 has been used as a reference catalogue.The mean epoch of the Pul-3 is 1963.25. The internal positional accuracyof the Pul-3 catalogue at the mean epoch of observations is ±80mas. The accuracy of the proper motions is mostly within ±3mas/yr to ±12 mas/yr. Comparisons of the Pul-3 with Tycho-2 andARIHIP have been done at the mean epoch of the Pul-3. The Pul-3 externalpositional accuracy relative to Tycho-2 is ±150 mas.The catalogue is only available in electronic form at the CDS viaanonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/418/357
| GPM - compiled catalogue of absolute proper motions of stars in selected areas of sky with galaxies.
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| The diameter of 375 URSULA from its occultation of AG + 39 deg 303
A value of 216 + or - 10 km for the mean diameter of Ursula is given,based on photometric measurements and observations of the occultation ofAG + 39 deg 303, a K-type star of visual magnitude 8.8, by 375 Ursula onNovember 15, 1982. From the occultation diameter and the absolute visualmagnitudes presented, the visual geometric albedo of Ursula isdetermined to be 0.032, similar to the value typical of C-typeasteroids.
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Osservazione e dati astrometrici
| Costellazione: | Perseo |
| Ascensione retta: | 02h42m01.08s |
| Declinazione: | +39°17'31.3" |
| Magnitudine apparente: | 8.821 |
| Distanza: | 381.679 parsec |
| Moto proprio RA: | 20.2 |
| Moto proprio Dec: | -20.5 |
| B-T magnitude: | 10.424 |
| V-T magnitude: | 8.954 |
Cataloghi e designazioni:
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