NGC 3953 is a barred spiral galaxy located about
54 Mly from us. it is about 131.2 kly across.
Hover over the image for an annotated view.
Date: 11 April 2026
FOV: cropped to 15' × 10'; the apparent size
of NGC 3953 is about 6.9′ × 3.6′
Rotation: 0.002°
Telescope: Orion 127mm Mak-Cass (1381mm, nominally 1540mm, f/12.1)
Guiding: ZWO ASI120MM mini mono guide camera,
SVBony SV165 Mini 40mm f/4 guide scope
Computer: ASIair pro Raspberry Pi
Mount: ZWO AM5N
Camera: ZWO ASI071MC Pro Cooled (-10°C) Color CMOS gain 90
Pixel size: 4.78 μm
Resolution: 0.714 arcsec/pixel
Filter: none
Frames: fifty-eight 300 second subs
Total Time: 4 hours and 50 minutes
Calibration: 20 flats, 20 dark flats, and 20 darks
Processing: Pixinsight – DBE, SPCC, BlurXT, NoiseXT → Linear
MAS, MStr, GHS, HST, PMath MAS, MStr + GHS + HST → Stars, Sat,
StarXT, MStr, GHS, HST, PMath MStr + GHS + HST → Starless,
HDRMST5PhLm, Sat, PMath ~(~Stars*~Starless) → Blend, scale
Location: Darling Hill Observatory near Vesper, NY
