About 200 CCD images of the comet C/1996 B2 - HYAKUTAKE were obtained and reduced, using four approaches by PPM stars and one by a GSC star, on March 20, 24, 25 and April 1-st, 1996, in Bucharest. Also, three photographical plates were reduced using PPM stars. The O-C analysis of the astrometric data allowed the testing of the accuracy of both the

We have discovered a relatively large number of brown dwarf candidates in the Pleiades young open cluster as a result of a deep CCD IZ survey covering 1 deg^2 down to limiting magnitudes I ~22 and Z ~21. Follow-up infrared photometry and low/intermediate-resolution spectroscopy of seven of our candidates in the interval 20 > I > 17.8 allow us to

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