In the Pulkovo observatory the observations of the Solar system objects and improvement of the processing methods are performing. EPOS (Ephemeris Program for Objects of the Solar system) is the effective math-soft application for study and ephemeris support of observations of such objects. There are the options in EPOS for calculation of the orbits of asteroids including NEAs and using the observations at the relatively short arc.Also we would like to present shortly our method of Apparent Motion Parameters (AMP) for determinations of orbits of artificial satellites and other objects from observations of short arc. The research program of the Orbital Stellar Stereoscopic Observatory (OSSO) is based on the stereoscopic method of observation for fundamental studies in the area of Celestial Mechanics, Asteroid and Comet Impact Hazard, Stellar Astronomy,Astrometry and Astrophysics with the magnitude of the target objects ranging from 8 m to 25 m . This project is designing for stellar-like objects observations, including the main types of the Solar system bodies.