M22 Globular Cluster


Date: 14 July morning, 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 IDAS LPS filter, behind a Meade 0.63x reducer.

Location: Tai Mei Tuk, Hong Kong

Exposure: ~12 x 5mins

Software: Image acquisition by Astroart, calibration by AIP4win, autoaligned by Astroart, sigma-combined by Sigma, DDP by AIP4win, final brightness adjustment by Astroart.