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Leo II Dwarf Galaxy

Leo II Dwarf Galaxy



Leo II (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.

[from wikipedia]

Date: 08/12/2016

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Image Data

Telescope: RCOS 14.5" f/8
Mount: ASA DDM85
Detector: Apogee U16M
Filters: Astrodon Gen 2
Exposures: LRGB 500:360:220:200min (20min subs)
Observatory: ROSA, France

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1. NGC 507... ... 3. Pinwheel... 4. NGC 4274 in... 5. Markarian's... 6. Leo II... 7. NGC 3486 8. Silver... 9. Whirligig... ... 53. M95 M96