Regular monitoring of the sky from Kleť began in 1968, looking for unidentified objects in 1977, and the systematic measuring of asteroid passage in 1994.

327 asteroids discovered on Kleť (valid up to December 1997), have been written on the „list of confirmed objects with a stated route" by the International Astronomical Union. This puts Kleť in sixth place in the world chart. A majority of the discovered asteroids are those of the main belt circulating round the Sun between the routes followed by Mars and Jupiter. The asteroids (3102) Krok and (5797) Bivoj belong to the type "Amor", and they come close to the route of the Earth in certain parts of the year.

One of the discoveries made on Kleť was named after the city of Český Krumlov. This asteroid, numbered 2747, is nearly twenty kilometres in diameter and circles the Sun once every 5.48 years.

From 1994 the research team has also specialised in measuring the exact positions of asteroids flying near the Earth or crossing the Earth's route, asteroids in the distant parts of the Solar System, and newly discovered comets, including the comet Shoemaker-Levy 9, before its collision with Jupiter, or the comet Hale-Bopp. In this field the Kleť observatory is one of the top ten in the world.

The main equipment is the photographic Maksutovov chamber with a 63-centimeter diameter of the correction meniscus, and the mirror telescope with a 57-centimeter diameter of the main mirror, provided with an electronic recording facility CCD. A new telescope is planned which will have a main mirror diameter of 102 centimeters.

The Kleť Observatory cooperates with the International Astronomical Union (IAU), the Spaceguard Foundation, and other foreign institutions.

The observatory also provides excursions for the public and schools.

Further information :
Blanský Forest Nature Reserve
Places of interest in the Český Krumlov Region
Places of Interest in Český Krumlov