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