NGC 891 "Silver Sliver Galaxy" (Michael Stecker)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: NGC 891

NGC 891 "Silver Sliver Galaxy", Michael Stecker

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NGC 891 "Silver Sliver Galaxy"

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NGC 891 "Silver Sliver Galaxy"

NGC 891
NGC 891 is an "edge-on" galaxy thought to be similar to our own Milky Way. It is about 30 million light-years from earth. This was a 2.2-hour exposure from my Los Angeles backyard with a 9.25-inch telescope at f/7.
file: NGC891-240sX20P3Cel925f7ASI533L-Pro9242023b2a2d.jpg
[i] [/i]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: 500 ms
Dec Duration: 300 ms
RA Duration: 200 ms
Aggression: 50% for both RA & Dec
Exposure time for guiding: 1 second
Guiding hardware:
SVBony 60 mm f/4 guide scope (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-Pro filter
.
exposures:
240 seconds X 20 (153-minutes or 2.5 hours)

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)

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NGC 891 "Silver Sliver Galaxy"

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