NGC 7217 is a gas‑poor, unbarred spiral galaxy, with
prominent concentric rings of stars in Pegasus.
Most star formation is occurring in the gas-
rich, blue outer ring. NGC 7217 is about
50 mly from our own Milky Way.
Hover over the picture for an annotated version
Date: 11 September 2026
FOV: about 10' × 6' 40"
Rotation: −0.002°
Telescope: Celestron 9.25" EdgeHD (nominally 2350mm, f/10
calculated 1678.41mm, f/4.142 with 0.7 × reducer)
Guiding: ZWO ASI120MM mini mono guide cameras,
SVBony SV165 Mini 40mm f/4 guide scopes
Computer: ASIair pro
Mount: ZWO AM7 harmonic drive
Camera: ZWO ASI6200mc Pro (-10°C) at 100 gain
Pixel size: 3.76 μm
Resolution: 0.462 arcsec/pixel
Stacking: ninety-four 300 second frames using Pixinsight
Total Time: 7 hours 50 minutes
Processing: Pixinsight
MGC, DBE, SPCC, BXT, NXT → Linear
Linear: MultiAdaptiveStretch → Stars
HTS, GHS, MStr, and MAS run on Linear
PixelMath 0.25*(HTS + GHS + MStr + MAS),
CurvesTransformation, HDRMST6PhLm → Starless
PixelMath ~(~Stars*~Starless), DynCrop/Scale
Location: Darling Hill Obseratory near Vesper, NY
