Arp 273 is a group of interacting galaxies, lying 300 million light years away in the constellation Andromeda. It was 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 and has a disc that is tidally distorted into a rose-like shape by the gravitational pull of the companion galaxy, UGC 1813, below it.
Details
20" f/4.1 telescope at the SDG observatory of Garry Sedun in Arizona.
TV Paracorr coma corrector and SBIG ST2000 XM camera.
Guidescope WO 80mm f/6.8 APO.
Mount - Paramount ME
Exposures -
B- used 8 of 10 4m exposures = 32m
Clr- used 8 of 10 4m exposures = 32m
G- used 6 of 7 4m exposures = 24m
R- used 6 of 10 4m exposures = 24m
plus flats, bias and darks to match.
Processed in Images Plus and Photoshop