Data Archives
	Asteroid Photometric Catalog (APC) This is the catalog containing all published photometric lightcurves of asteroids. It is continuously updated and maintained by the Planetary System Group at the Uppsala Observatory. Asteroid Proper Elements A data base of proper elements for 14 580 asteroids built and maintained by the Space Mechanics Group at Pisa University. Fully documented public-domain software for proper element calculation is also provided. Electronic Atlas of the Dynamical Evolution of Short-Period Comets and Near-Earth Asteroids (LTEP) Here you can find information concerning the orbital evolution of short period comets and NEAs. This material, which is mainly presented in graphical form, is provided by Andrea Carusi and Giovanni B. Valsecchi of the IAS in Rome. Rotation Periods of Asteroids The re-analysis of the lightcurves contained in the Asteroid Photometric Catalog (APC) by the Planetary System Group at the Uppsala Observatory has resulted in the determination of rotation periods for more than 700 asteroids. Physical and Dynamical Properties of NEOs This data base, created and maintained by Gerhard Hahn of the Institute of Space Sensor Technology and Planetary Exploration of DLR in Berlin, is a compilation of discovery circumstances, orbital classifications, and physical properties of Near Earth Asteroids. NEODyS (Near Earth Objects Dynamic Site) NEODyS, a data-base developed by Andrea Milani and coworkers and hosted at the University of Pisa, provides information and services for Near Earth Asteroids. It allows one to browse the list of objects in the database, to search for a specific object or for objects with particular characteristics, to compute ephemeris in real time and provides close approaches analysis and collision probabilities.
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