NGC7635 Bubble Nebula
Date: 15 July 2003
Telescope: Celestron 8” SCT with stabilized mirror, on Gemini G-41 mount
Guiding: ST-4 Autoguider with Celestron C80, 80mm F11 refractor piggybacked on C8.
Camera: MX916 with Schuler Hydrogen-alpha filter, behind a Meade 0.63 reducer
Location: Tai Mei Tuk, Hong Kong
Exposure: 19 x 10mins
Software: Image acquisition by Astroart, calibration and auto-alignment by Astroart (no flatfield), sigma-combined by Sigma, DDP by AIP4win, and final brightness adjustment by Astroart