M27 Dumbbell Nebula

Date: 6 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 IDAS LPS filter

Location: Tai Mei Tuk, Hong Kong

Exposure: 13 x 5mins

Software: Image acquisition by Astroart, calibration and auto-alignment by AIP4win, sigma-combined by Sigma, R-L deconvolution by AIP4win, final brightness adjustment by Astroart

Later I added H-alpha and O-III exposure as RGB and use this exposure as the Luminence in LRGB combination to get a artificial colour image of M27 M27 in narrow band color