Jones 1, or planetary nebula PK 104‑29.1, is a small,
very faint (magnitude 15) deep sky object in the
constellation Pegasus. Approximately 3.5 ly
across, Pk104-29.1 is 2.3-2.7 kly from us.
Its color indicates that it is composed
almost entirely of OIII.
Hover over the picture for an annotated version
Date: 14 and 13 August 2026
FOV: 25' × 16' 40"
Rotation: 90.014°
Telescopes: Celestron 9.25" EdgeHD SCT (nominally 2350mm, f/10
with Celestron 0.7x reducer, 1678.39mm, f/7) and an
SVBony MK127 Mak-Cass (nominally 1500mm,
calculated 1450.21mm, f/11.4)
Guiding: ZWO ASI120MM mini mono guide cameras,
SVBony SV165 Mini 40mm f/4 guide scopes
Computer: ASIair pro Raspberry Pi and ASIair plus
Mount: ZWO AM7 and AM5 harmonic drives
Cameras: ZWO ASI6200MC Pro (-10°C) at 100 gain and
ZWO ASI071MC Pro (-10°C) at 90 gain
Pixel size: 3.76 μm and 4.78 μm
Resolution: 2.594 arcsec/pixel
Frames: 87 × 300 seconds C925, Optolong L-eNhance filter,
89 × 300 seconds MK127, Optolong UV/IR cut filter
Stacking: one hundred seventy six 300 second frames using Pixinsight
Total Time: 14 hours 40 minutes
Processing: Pixinsight
preprocessing → L-eNhance×87 and UV/IR×89
LeNh: MGC, DBE, SPCC, BXT, NXT, StarXT → LinearLeNh
UV/IR: MGC, DBE, SPCC, BXT, NXT → LinearUVIR
LinearUVIR: StarXT → LinearUVIR_StarXT
LinearUVIR: MultiAdaptiveStretch → Stars
PixelMath ~(~LinearLeNh*~LinearUVIR_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
