Arp 273 is a pair of interacting galaxies, 300 million light years away in the constellation Andromeda.
It was first described in the Atlas of Peculiar Galaxies, compiled by Halton Arp in 1966.
The larger of the spiral galaxies, known as UGC 1810, is about five times more massive than the smaller galaxy.
It has a disc that is tidally distorted into a rose-like shape by the gravitational pull of the companion galaxy below it, known as UGC 1813.
The smaller galaxy shows distinct signs of active star formation at its nucleus, and "it is thought that the smaller galaxy has actually passed through the larger one."[(wiki)

Please see the next image for a closer look.

L--RGB image
RGB 20 min each
Luminance - 180 minutes

Total of about 4 hrs.

Telescope: ASA600 24" RC with Reducer at f4.5
Mount: ASA DDM200 Direct Drive with Absolute Encoders
Camera: Moravian G3 61000 pro

Imaged from Tivoli farm, Namibia

Moravian C3 61000 pro