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texto_bright Object: Abell 21 H-OIII-OIII palette (RGB stars)
Date: Novembre 2022 - February 2023
Observing site: FNO (Fosca Nit Observatory, Àger)
Telescopes: Takahashi TOA-150 @ f/7.3 & FSQ-106N @ f/5.0 on EM-400 mount
Cameras: SBIG STL-11000M @ -20C
Filters: Ha, OIII (Baader). RGB (Astrodon)
Exposure: 37 x 30 min Ha, 19 x 30 min OIII. Total exposure time: 28 h.
Guiding: Camera guide chip
Software: CCDCommander, CCDSoft & AstroArt. Processing PixInsight

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