NGC 2903 is a barred spiral galaxy in the constellation Leo. It is quite bright and not far from galaxies M65 and M66, so it's hard to imagine how Charles Messier could have missed it and not put it in his famous catalog. 

Exposures: LRGB=330:80:80:80 minutes=9.5 hours total exposure. at f/8.3. Adaptive Optics at 7Hz. 

This image was published as a Picture of the Day on Astronomy.com