Weinberger 2-5 is a very faint planetary
nebula in the constellation Cassiopeia.
Hover over the picture for an annotated version
Date: 14 and 11 September 2026
FOV: about 15' × 10'
Rotation: 0.001°
Telescope: Celestron C925 EdgeHD with 0.7× reducer,
calculated 1679.46mm, f/7
SVBony MK127, calculated 1421.84mm, f/10
Guiding: ZWO ASI120MM mini mono guide cameras,
SVBony SV165 Mini 40mm f/4 guide scopes
Computer: ASIair 256g and ASIair Plus
Mount: ZWO AM7 and AM5 harmonic drive
Camera: ZWO ASI6200mc Pro (APS/c mode) C925 (-10°C) at 100 gain
ZWO ASI071mc Pro (-10°C) at 90 gain
Pixel size: 3.76 μm ASI6200, 4.78 μm ASI071
Resolution: 0.462 arcsec/pixel C925, 0.693 arcsec/pixels MK127
Frames: 82 × 300 seconds, Optolong L-Ultimate filter, 14 September
52 × 300 seconds, Optolong L-eNhance filter, 11 September
Stacking: one hundred thirty-four 300 second frames using Pixinsight
Total Time: 11 hours 10 minutes
Processing: Pixinsight
preprocessing → LUlt×82 and LeNh×52
L-eNh: MGC, DBE, SPCC, BXT, NXT, StarXT → LinearLeNh
L-Ult: MGC, DBE, SPCC, BXT, NXT → LinearLUlt
LinearLeNh: StarXT → LinearLeNh_StarXT
LinearLeNh: MultiAdaptiveStretch → Stars
PixelMath ~(~LinearLeNh*~LinearLUlt_StarXT) →
LinearStarless, HTS, GHS, MStr, MAS,
PixelMath 0.25*(HTS + GHS + MStr + MAS) → Starless
PixelMath ~(~Stars*~Starless), DynCrop/Scale
Location: Darling Hill Observatory near Vesper, NY
