The Rosette Nebula - C49
The Rosette Nebula (sometimes known as Swift’s Nebula) is just to the East of Orion, but is extremely difficult to see visually. The open cluster of stars in the centre (Caldwell 50) is readily visible and is used to check that the telescope with camera are pointing in the correct place.
This image taken in March 2011 is the second image taken since my camera was modified to make the camera more sensitive to the red Hydrogen Alpha light emitted by this and other nebulae.
Exposure details: 34 x 5 minute guided exposures (= 2 hours 50 minutes total) through my Celestron 80ED refractor at prime focus with a modded Canon 40D DSLR camera. Dark and flat field frames also taken.
This time I used an Astronomic CLS filter to combat the light polution.
