NGC2237 Rosette Nebula
Date: 25 and 26 December night, 2003
Telescope: Borg 76ED (grade B), piggybacked on C8, on Gemini G-41 mount
Guiding: ST-4 Autoguider with Celestron 8” SCT with stabilized mirror.
Camera: Genesis KAF1602E, with Astronomik Hydrogen alpha filter behind a Televue 0.8x reducer
Location: Tai Mei Tuk, Hong Kong
Exposure: 25 x 10mins
Software: Image acquisition by Astroart, calibration and auto-alignment by Astroart, sigma-combined by Sigma, blooming spikes removed and touch-up in Photoshop, and final brightness adjustment by Astroart.