This has been referred to as an overlooked Messier object- viewed on 13th March, 2018 with my Vixen ED115S at 60x.
It appeared as a faint hazy, elliptical in shape. It did not seem to brighten in the center. However, I notice some sketches on the Cloudy Nights Forum that show a brighter galactic-central region.
I have previously viewed this with a 12" Dob, and admit that I would have appreciated more aperture for this viewing.
Nevertheless, it often overlooked because of the abundance of other interesting galaxies in Leo. Indeed, there does not seem to be that much literature on NGC 2903.
More information:
https://en.wikipedia.org/wiki/NGC_2903
https://www.cloudynights.com/topic/5...c-2903-in-leo/
https://www.cloudynights.com/topic/532474-ngc-2903/
https://www.cloudynights.com/topic/4...galaxy-in-leo/