Constructed in 1957, the observatory is at an altitude of 1,070 metres (3,510 ft) and has around 150 clear nights per year.

[1] Two main astronomers who currently work at Kleť Observatory are Jana Tichá and her husband Miloš Tichý.

The asteroid 7796 Járacimrman was (re)discovered at Kleť Observatory on 16 January 1996 by Zdeněk Moravec and was designated 1996 BG.

Asteroid 4250 Perun, provisional designation "1984 UG", was discovered by Zdeňka Vávrová on 20 October 1984.

KLENOT is an initialism of KLET Observatory Near Earth and Other unusual objects observations Team and Telescope.