A little bit north of the famous edged-on galaxy NGC4565 this fine barred spiral galaxy of type SAB(rs)cd can be detected easily with mid-sized telescopes (<10cm aperture) in the northern constellation of Coma Berenices.
Sized apparently 10,7′ × 4,4′ with an magnitude of 9.6mag it has a real distance of 35 mio.light-years and surprised with some supernova events in recent years (SN 1941A,an unclassified supernova event in 2019.a supernova-like outburst in 2016 of a blue variable star).
NGC4559 was first detected by William Herschel in 1785.
position (epoch 2000):
Ra.: 12h 35m 57,7s
Decl.: +27° 57′ 35,1″
LRGB (480-140-140-140 min),a total of 15.0 hours
80cm f/7 AstroOptik Keller corrected cassegrain
FLI Proline 16803 Astrodon LRGB Gen-II filters Prompt 7
CTIO/UNC Chile,remote controlled
image processing: Bernd Flach-Wilken
here you see NGC4559 in a squared 22,1arc.min.large field of the sky in Coma Berenices.
For full resolution click HERE
this is a larger version of the picture above:
a mosaic picture of NGC4559 taken with the HST ca be seen HERE