Object: S171 in Cepheus
Observing Site: Azor Observatory, Las Rozas, Madrid, Spain. 18.84 mag arcsec-2
Date: Data acquired on July 13-14 (Ha), August 30, 31 (OIII) and September 3 (SII).
2008
Camera: SBIG STL-11000M @ -15ºC
Telescope: ASA N10 Astrograph @ f/3.6, Astrophysics AP1200 mount
Filters: Astrodon 6nm H alpha
Exposure: 1140 minutes (19 hours, 38x30 min subs)
Processing Software: Maxim DL, Photoshop
Comments: CCD Commander used for unattended data acquisition. Shown at 50% size