Chiefland Astronomy Village, FL; April 8/9 and 12/13, 2021.
TAK 250 mm CDK reduced to f/7.3 and 1825 mm f.l. = 0.49 sec/pix on Nikon
D850.
Central DS cooled, modified Nikon D850 full frame camera.
ISO 800, 31 subs x 4 min = 124 min exposure; 4 flats, no darks (dithering),
Median Kappa Sigma clip stacking.
AP 1100 mount, Borg 50 mm f/5 guide scope, ZWO 290 guide camera, PHD2 guide,
dithering. (Double Tak
configuration).
Stacked with Deep Sky Stacker and processed with Images Plus and Picture
Window Pro.
Notes: As you can guess, it took a lot of stretching
to bring out the antennae themselves which increased the back ground noise.
Here is an APOD of the
Antennae.
