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Crescent Nebula NGC 6888
Crescent Nebula - NGC 6888
Instrument: Takahashi 106 Fsq f/5 on Gemini G42 + ccd Kai 4021
Exposures: Ha 15x20' (1x1), OIII 8x4' (2x2), SII 8x10' (2x2), Astrodon filters (Ha 5 nm), CFHT mapped.
Date: July 2009
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