M27 "Dumbbell Nebula" longer exposure on 8-15-2023
M27 is a planetary nebula in the constellation Vulpecula photographed for 90-minutes on August 15, 2023.
file: M27-120sX45Cel925f7P2-8152023a2.jpg

Photographic Data
telescope:
Celestron 9.25-inch EdgeHD SCT at f/7 (focal length= 1,637 mm)
 

mount:
ZWO AM5 harmonic/strainwave
Mount Guide Settings in Asiair Plus:
Calibrate Step: 5,000 ms
Dec Duration: 3,000 ms
RA Duration: 2,000 ms
Aggression: 50% for both RA & Dec
Exposure time for guiding: 1 second

Guiding hardware:
SVBony 60 mm f/4 guidescope (fl=240 mm)
Guide Camera: ZWO ASI662MC color planetary camera (2.97 micron pixels)

controller/computer
ZWO Asiair Plus via WiFi to Samsung S7+ tablet
.
imaging camera:
ZWO ASI533MC-Pro one-shot color astro-camera cooled to 14-degrees F with Optolong L-eNhanced nebular filter
.
exposures:
120 seconds X 45 (90-minutes)

processing
Stacked in Asiair Plus and cropped and post-processed in Adobe Photoshop Elements
.
photographic site:
West Los Angeles
http://mstecker.com/pages/chhouses_fp.htm
(Bortle 9 light polluted sky)

Photographic Data
telescope:
Celestron 9.25-inch EdgeHD SCT at f/7 (focal length= 1,637 mm)
.
imaging camera:
ZWO ASI533MC-Pro one-shot color astro-camera cooled to 14-degrees F with Optolong L-Pro light pollution filter
.
exposures:
120 seconds X 51 (102-minutes)
.
photographic site:
West Los Angeles
http://mstecker.com/pages/chhouses_fp.htm
(Bortle 9 light polluted sky)