Asteroid (4) Vesta is known as the unique large object of the main belt showing a basaltic crust and is a target of the NASA Dawn Mission. Vesta composition is also similar to that of basaltic achondrite meteorites, specifically the Eucrites, Diogenites and Howardites (HED). On the other hand, in recent taxonomies, asteroids showing a spectrum

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SAX J1747.0-2853 is an X-ray transient which exhibited several outbursts between 1998 and 2001 and most probably in 1976. The outburst of 2000 was the longest and brightest. We have analyzed X-ray data sets that focus on times around the 2000 outburst and were obtained with l BeppoSAX, XMM-Newton and l RXTE.

Asteroids in cometary orbits can be defined as minor planets that do not present cometary activity and has orbits with Tisserand parameter T 3 (typical of cometary orbits). The nature and origin of this population is still controversial. Recent dynamical studies claim for a cometary origin (comets that become dormant or dead comets by the growth

Based on a new large, homogeneous photometric database of 69 Galactic globular clusters extended out to 42 kpc from the galactic center, a set of distance and reddening free relative age indicators has been measured: delta (V-I)@2.5 and Delta VHBTO. Using this two independent indicators and two recent updated libraries of isochrones we have found

We report on a novel investigation of the complex magnetism of the quiet Sun which is based on a realistic three-dimensional modeling of the Hanle effect.