Leo II (PGC 34176) Dwarf Galaxy
Leo II (PGC 34176) Dwarf Galaxy (or Leo B) is a dwarf spheroidal galaxy (type E0 pec) about 690,000 light-years away in the constellation Leo. It is a satellite galaxy of the Milky Way with an apparent of 12 x 11 arcmin and mag 12.6. Leo II is thought to have a core radius of 570 ± 41 lightyears and a tidal radius of 2022 ± 102 lightyears. It was discovered in 1950 by Robert George Harrington and Albert George Wilson, from the Mount Wilson and Palomar Observatories in California on plates obtained from the 48-inch Schmidt Telescope on Mt. Palomar.
This deep image shows many RR Lyrae and Red Giant Branch type stars of mag 18 to mag 21. North is about 2 o’clock.
[description from Wikipedia]