A rare “collision ring galaxy” lying at 566 million ly. A somewhat smaller, but high density “intruder” galaxy has plunged through the center of the host spiral. The ring is caused by a compression wave driven outward by the intruder at impact. This triggers star formation in the material composing the outer ring.

12 1/2″ Ritchey-Chretien Telescope with a ST10XE/CFW8. F/6 LRGB (50/7minBW, 11/5min RGB 2×2 bin. Scaled on Maxim DL at R 1.0, G 1.0, B 1.6).