Ive spent the last 10 days down at our retirement getaway ( NexDome Obs ) with the tail end of a waning Moon. Although skies were generally clear conditions were really poor with a south west jet stream running most nights. Seeing and transparency ( stars scintillating all night ) was bad and this reflected in my guiding where I struggled to get below 0.85 arc sec most nights and Dec and Ra see sawing ( chasing the seeing )
Chose to image the Lobster as it was well placed early in the night at mid altitudes plus I haven't imaged this object from my Dome with the 2600MM.
Bortle 3 Coastal Rural location
Waning Moon
Seeing poor
Telescope 10" f5 Klaus Helmerich Carbon Fibre Newtonian ( Self Built ) FL 1250mm
Imaging Camera ZWO 2600MM cooled to -10C , Gain 100 HCG
Coma Corrector TS Optics GPU
Antlia 3nm filters
PHD2 Multistar Guiding ( 0.80 to 0.95 arc sec total ) Stars round but bloated ( discarded quite a few bad subs )
Orion 60mm guidescope with Helical focuser
ZWO EFW 7 x 2" filterwheel
ZWO EAF focuser
Tracking and Goto EQMOD and Stellarium
Aquisition and Capture APT
Ha 137 x 2 min dithered subs
Oiii 141 x 2 min dithered subs
Sii 157 x 2 min dithered subs
Full Calibration Suite
Darks from Library
Flat Darks Ha, Oiii and Sii
Total Integration 14.5 hours
Subs reviewed in ASTAP
Subs analysed, calibrated , stacked and aligned in ASTAP
Post processed in Startools V1.8 via Compose using Luminance/Color L+Synthetic L from RGB, RGB.
SHO and HOO versions
Astrobin links for ful resolution…,
https://www.astrobin.com/full/ww3ttg/0/
https://www.astrobin.com/full/f8n6yz/0/
https://www.astrobin.com/full/0xml2c/0/
https://www.astrobin.com/full/dogayn/0/
Attached images 200KB limit
Native frame versions
Cropped versions for a closer look
NB: This image is presented as documentary astrophotography and has not used any AI enhanced or AI assisted technology during post processing
Thanks for Looking
Comments Welcome
Martin