WR 134, or HIP 99372, is a Wolf-Rayet star
in Cygnus with a surface temperature
of 63 000 K (versus 5800 K for Sol)
and a luminosity 400 000 times
that of our sun. This energy
pushes out the ring of blue
gas surrounding WR 134.
HIP99769, +36° 40', is WR 137.
Hover over the picture for an annotated version
Date: 20 August 2026
FOV: 120' × 80'
Rotation: 0.000°
Telescopes: Celestron 9.25" EdgeHD SCT (nominally 2350mm, f/10
with Starizona HyperStar, 514.85mm, f/2.2) and a
Stellarvue SVX102T triplet apo (nominally 714mm,
calculated 526.55mm, f/5.16 with a 0.74× reducer)
Guiding: ZWO ASI120MM mini mono guide cameras,
SVBony SV165 Mini 40mm f/4 guide scopes
Computer: ASIair plus and ASIair 256G
Mounts: ZWO AM7 and AM5 harmonic drives
Cameras: ZWO ASI6200mc and ASI2600mc (-10°C) at 100 gain
Pixel size: 3.76 μm (both cameras)
Resolution: 1.506 (C925) and 1.473 (SVXT) arcsec/pixel
Frames: 78 × 300 seconds, Optolong L-Para filter (C925)
77 × 300 seconds, Optolong UV/IR cut filter (SVXT)
Total Time: 13 hours 45 minutes
Processing: Pixinsight
preprocessing → L-Para×78 and UV/IR×77
L-Para: MGC, DBE, SPCC, BXT, NXT, StarXT → LinearLPara
UV/IR: MGC, DBE, SPCC, BXT, NXT → LinearUVIR
LinearUVIR: StarXT → LinearUVIR_StarXT
LinearUVIR: MultiAdaptiveStretch → Stars
PixelMath ~(~LinearLPara*~LinearUVIR_StarXT) →
LinearStarless, HTS, GHS, MStr, MAS,
PixelMath 0.25*(HTS + GHS + MStr + MAS) → Starless
PixelMath ~(~Stars*~Starless), DynCrop/Scale
Location: Stony Creek State Boat Launch near Henderson, NY
