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Tuesday, November 23, 2010


Comet 43P Harrington near NGC 4094

Comet 43P Harrington imaged near NGC 4094 using Global-rent-a-scope GRAS-05 on 19 November.

This was going to be a bit of a challenge, 43P is a dim, 14.5 magnitude comet. At astronomical twilight it was only 25 degrees above the horizon, just within range of the GRAS scopes and clearing away from the horizon murk.

The image is a stack of 2 x 90 second frames (after dark frame correction), converted to a single image using Z projection of MAX intensity. It should have been 3 but the scope lost tracking on the last image.

Still, I think it came out rather well, more images to stack would have been better, but the time frame was tight.

The image to the left is the SkyMap chart of the same field

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