NGC6823 open cluster in Vulpecula

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Technical Details:

Objects: NGC6823 open cluster in Vulpecula
Observing Site: Azor Observatory, Las Rozas, Madrid, Spain. Sky brightness 18.84 mag arcsec-2
Dates: 2009 August 25-28 
Camera: SBIG STL-11000M  @ -10ºC 
Telescope: ASA N10 astrograph @ f/3.8, Astrophysics AP1200 mount
Filters: Astrodon 6nm Ha, SII and OIII
Exposure: Total exposure 22 hours. Ha 690 minutes (23x30 min subs); SII 390 min (13x30); OIII 240 min (8x30)
Processing Software: Maxim DL, Photoshop
Comments: CCD Commander used for unattended data acquisition. HST Palette. Shown at 75% size

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