The Cartwheel Galaxy (also known as ESO 350-40) is a lenticular galaxy and ring galaxy about 500 million light-years away in the constellation Sculptor.
It has a visual size of only 60"
It is an estimated 150,000 light-years across, has a mass of about 2.9–4.8 × 109 solar masses, and rotates at 217 km/s.

It was discovered by Fritz Zwicky in 1941.
Zwicky considered his discovery to be "one of the most complicated structures awaiting its explanation on the basis of stellar dynamics."

An estimation of the galaxy's span resulted in a conclusion of 150,000 light years, which is slightly larger than the Milky Way.[WIKI]

L-RGB image

Lum - 70 min (BIN 1)

RGB 20 min each (BIN 2)

Total of 2:10 Hrs

Imaged with the 16" f3.75 Dream Astrograph.
Apogee Alta U-16M camera.



Imaged from Tivoli farm in Namibia June 2014