Composite image in the form (H-alpha+R, OIII+B, OIII+B).
IMAGING DATA
Optical train: AP167FLZ + flattener
Mount: AP1100 CP4
Guiding: QHY5II-L, 60/230 guidescope.
Camera: Apogee U16M (-30°C)
Filters: Astrodon 2nd Gen 3nm Ha,OIII, and R and B filters.
Frames: 25x10-min + 5x20-min in Ha, 29x10-min + 6x20-min in OIII, 6x10-min in R and B. Total of 14.6 hours.
Processing: PI 1.8 + Canon DPP
Date: during three nights in September 2017.
Place: General Pacheco, Buenos Aires, Argentina
Seeing & transparency: one good, two poor nights (suburban skies, occasional high thin clouds, half to full moon)
