In august 2002 we started an observational program to obtain physical information of a significant number of Near Earth Objects by means of simultaneous visible and near infrared spectroscopy and spectrophotometry using telescope facilities of Teide and El Roque de los Muchachos Observatories (Canary Islands, Spain). Near infrared spectroscopy is

Jupiter-family comets are of particular interest for several reasons, including the fact that they are the most accessible to spacecraft. These comets also present the best opportunities to study cometary nuclear surfaces. The characterization of cometary nuclear surfaces and their comparison with those of related populations such as extinct comet

IAUC 8131 available at Central Bureau for Astronomical Telegrams.

The technique of Doppler imaging enables us to map starspots at the surfaces of rapidly rotating cool stars. Starspots are probes of magnetic activity, thus the locations of these spots also indicate where the strongest magnetic fields tend to emerge. We present surface spot maps of the K2V component of V471 Tau from 2001-2002. Our spot maps can be

We analyze the stellar populations present in M31 by using nine sets of adjacent Hubble Space Telescope NICMOS camera 1 and 2 fields with galactocentric distances ranging from 2' to 20'. These infrared observations provide some of the highest spatial resolution measurements of M31 to date; our data place tight constraints on the maximum

The spectrum of HD 191612 has been found to display large, recurrent variations between two highly reproducible, peculiar states; at least four transformations have occurred since 1950. In one state, the spectral type is O6-O7, with C III λ4650 emission comparable to N III λ4640 (the definition of the Of?p category) and P Cygni profiles at He II