Light Pollution

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M27, The Dumbbell Nebula

Once in a while everything during an imaging session works right. No meridian flip, no guiding issues, no focus problems--everything was clicking along for this one. I've been using a camera cooler for the last couple of shots, and am pleased with the improvement. It's amazing how much easier processing is with clean data to begin with!

I almost never image at f/10, but this is through the C11 at 2800mm focal length, There's some movement between the subs--probably from mirror flop--but in the end the stars are still pretty round. This CI-700 seems to be a keeper!

Heritage Park Observatory, Cedar Park, TX
Exposure: 45 @ 120 sec (1.5 hours), ISO 1600
Camera: Canon Digital Rebel XT (350D) (Modified)
Scope: Celestron C11
Mount: CI-700
Guider: ZS66, DSI
Filter: none
Software: Nebulosity, PHD Guiding, Photoshop

M57, The Ring Nebula

I've had the C11 for a while now, but this is the first time I've used it try shooting a DSO. This is the famous Ring Nebula, M57, a planetary nebula in Lyra. You can just see a barred spiral galaxy IC1296 below and to the right.

Heritage Park Observatory, Cedar Park, TX
Exposure: 45 @ 120 sec (1.5 hours), ISO 1600
Camera: Canon Digital Rebel XT (350D) (Modified)
Scope: Celestron C11
Mount: CI-700
Guider: ZS66, DSI
Filter: none
Software: Nebulosity, PHD Guiding, Photoshop