Sometimes called The Valentie Rose Nebula, Sh 2-174
is a planetary nebula in the constellation Cepheus.
Hover over the picture for an annotated version
Date: 11 September 2026
FOV: about 75' × 50'
Rotation: 0.001°
Telescope: Stellarvue SVX102T, calculated 736.16mm, f/7
Guiding: ZWO ASI120MM mini mono guide cameras,
SVBony SV165 Mini 40mm f/4 guide scopes
Computer: ASIair 256g
Mount: ZWO AM5 harmonic drive
Camera: ZWO ASI2600mc Pro (-10°C) at 100 gain
Pixel size: 3.76 μm
Resolution: 1.054 arcsec/pixel
Stacking: ninety-five 300 second frames using Pixinsight
Total Time: 7 hours 55 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
