NGC 4567 and NGC 4568 seen on the Left side (nicknamed the Siamese Twins or the Butterfly Galaxies) are a set of unbarred spiral galaxies about 60 million light-years away in the constellation Virgo.
They were both discovered by William Herschel in 1784.
They are part of the Virgo cluster of galaxies.
These galaxies are in the process of colliding and merging with each other, as studies of their distributions of neutral and molecular hydrogen show, with the highest star formation activity in the part where they overlap.
They were named "Siamese Twins" because they appear to be connected.(WIKI)

The small companion galaxy to the right is NGC 4564

Luminance was taken with:
Scope: Officina-Stellare RiDK 305, FL 2,400 mm, F/7.9
Mount: GTO 1200
Camera and Filters: STF 8300M, Astrodon Gen II

18 X600 sec - total of 3 hrs

Color was taken with 16" Dream Astrograph (30 min for each RGB)

Grand total of 4.5 HRS

Imaged from Tivoli farm in Namibia