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TYC 2415-688-1


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The Princeton Variability Survey
The Princeton Variability Survey (PVS) is a robotic survey that makesuse of readily available ``off-the-shelf'' type hardware products, inconjunction with a powerful set of commercial software products, inorder to monitor and discover variable objects in the night sky. Themain goal of the PVS has been to devise an automated telescope and datareduction system requiring only moderate technical and financialresources to assemble, which may be easily replicated by the dedicatedamateur, a student group, or a professional and used to study anddiscover a variety of variable objects, such as stars. This paperdescribes the hardware and software components of the PVS device as wellas observational results from the initial season of the PVS, includingthe discovery of a new bright variable star.

Absolute proper motions of open clusters. I. Observational data
Mean proper motions and parallaxes of 205 open clusters were determinedfrom their member stars found in the Hipparcos Catalogue. 360 clusterswere searched for possible members, excluding nearby clusters withdistances D < 200 pc. Members were selected using ground basedinformation (photometry, radial velocity, proper motion, distance fromthe cluster centre) and information provided by Hipparcos (propermotion, parallax). Altogether 630 certain and 100 possible members werefound. A comparison of the Hipparcos parallaxes with photometricdistances of open clusters shows good agreement. The Hipparcos dataconfirm or reject the membership of several Cepheids in the studiedclusters. Tables 1 and 2 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

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Observation and Astrometry data

Constellation:Fuhrmann
Right ascension:05h28m10.46s
Declination:+35°55'25.9"
Apparent magnitude:10.592
Proper motion RA:-0.4
Proper motion Dec:-5.8
B-T magnitude:10.693
V-T magnitude:10.601

Catalogs and designations:
Proper Names   (Edit)
TYCHO-2 2000TYC 2415-688-1
USNO-A2.0USNO-A2 1200-03356462
HIPHIP 25593

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