NGC 891, the Outer Limits Galaxy, is an edge-on spiral galaxy in
Andromeda. Also known as the Silver Sliver Galaxy, NGC 891
is 27.3 Mly from us and contains 500 billion stars.
Hover over the picture for an annotated version
Date: 6 November 2021
FOV: approximately 66' × 44'; the apparent dimension of NGC 891 is about 13.5' × 2.5'
Telescope: Stellarvue SVX102T + SFFX-1 flattener (714mm, f/7)
Guiding: ZWO ASI120MM mini mono guide camera,
Stellarvue F050G 50mm guide scope
Computer: ASIair pro Raspberry Pi
Mount: iOptron CEM40
Camera: ZWO ASI071MC Pro Cooled (0°C) Color CMOS with gain 180
Filter: none
Stacking: Forty-nine 200 second frames using Deep Sky Stacker
Total Time: 2 hours 43 minutes 20 seconds
Processing: Pixinsight – SPPC, DBE, SPCC, BlurXT, NoiseXT, DynCrop → Linear
MStr, GHS, HST, PMath MStr + GHS + HST → Stars, Sat,
StarXT, MStr, GHS, HST, PMath MStr + GHS + HST → Starless,
HDR8468PhLm, Sat, PMath ~(~Stars*~Starless) → Blend, scale
Location: Darling Hill Observatory near Vesper, NY
