NGC 1491

This image was taken with a Planewave CDK20 telescope and a FLI Pl 16803 camera on a Paramount MEII mount using Astrodon 3nm narrow band filters. Red is sulfur, green is Ha and blue green is oxygen Oiii. Ha was bined 2:2 and Sii and Oiii were binned 4:4. There were 120, 20 minute exposures for a total of 40 hours of imaging.