Leo II (PGC 34176) Dwarf Galaxy 

Leo II (PGC 34176) Dwarf Galaxy Astrophotography Martin Rusterholz

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]

Details

Tele­scope:
Mount:
Cam­era:
Fil­ters:
Expos­ure:
Loc­a­tion:
Author:
RCOS 14.5″ f/​8
ASA DDM85
Apo­gee U16M
Astro­don Gen2
LRGB 500:360:220:200 min.
ROSA Remote Obser­vat­or­ies South­ern Alps
© Mar­tin Ruster­holz, Astrophotographer

Find­er Chart Leo II (PGC 34176)

Leo II Galaxy Astrophotography Martin Rusterholz Skychart

Image cre­ated by Skychart