Veil Nebula in Perseid times. Funny how many of the meteors I've seen ended up being neither Perseids nor Kappa Cygnids nor anything identifyable.

Processing:

1 stack of 60 images, Canon 800D at ISO 800, Takumar 135mm f2.5 lens at f4, 30s exposures, tracked with Omegon minitrack lx2. a couple dozen darks, 120 biases. Processed in PixInsight as below

***** Integration

lightvortexastronomy tutorial (https://www.lightvortexastronomy.com/tutorial-pre-processing-calibrating-and-stacking-images-in-pixinsight.html)

* img 3027 has a meteor on it

* weighing:

15*(1-(FWHM-FWHMMin)/(FWHMMax-FWHMMin))

+ 25*(1-(Eccentricity-EccentricityMin)/(EccentricityMax-EccentricityMin))

+ 20*(SNRWeight-SNRWeightMin)/(SNRWeightMax-SNRWeightMin)

+ 40

img 2989 ref

drizzle integration

***** Meteor stack and initial adjustments

* take aligned meteor image, denoise with EZDenoise on default, integer upsample 2x

* dynamic crop both integration and meteor image to width 11250 height 7500 anchor x 5985 anchor y 3945

* extract RGB channels in drizzle, linearfit on green, recombine. Also linearfit the meteor image's channels to integration green. Clean up that geostationary that's too close to the meteor

** Mask generation

* iif( meteor_G > 0.0253 & d2seg(3395, 1894, 6233, 3754) < 50, 1, 0)

* clean up with clone stamp, blur 4 MLT layers - meteor_mask

* merge the two: meteor * meteor_mask + (1 - meteor_mask) * drizzle_integration

***** Linear processing

* DBE, tolerance 3, hand-placed points

* photometric CC, background neutralization on right corner, FL 135 pixel 2, centered on Veil

* SNCR green 0.95, with protected meteor

* Denoise with EZDenoise, lower TGV exponent by 1

** Remove halos

* blue mask: veil_B - (veil_G + veil_R) / 2, stretch mids = 0.003. clonestamp out nebula, stretch shadows 0.05 mids 0.15

* with mask on, SNCR blue, then green

***** Nonlinear processing

*** Initial stretch

* EzsoftStretch

* ACDNR on meteor trail, with lightness mask (blurred 4 layers)

* EZStarReduction, 8 iterations

***MLT stretch

http://www.stelleelettroniche.it/en/2014/09/astrophoto/m42-ngc1975-multilayer-processing-first-part/

**Initial (fine details)

* extract first 5 MLT layers, diff

* extract luma from original, stretch shadows 0.2 mids 0.25, then iif($T > 0.7, 0.7, $T), apply as mask on left

* sum back together, rescaled

**Second (Veil nebula)

* extract first 6 MLT layers, diff

* on mlt: star mask, boost RGB and saturation

* on left: extract luminance, stretch shadows 0.15 mids 0.15, iif($T > 0.8, 0.8, $T), blur 4 layers of MLT, apply as mask. Then curve boost RGB (some) and saturation(sharply)

* sum back together, rescaled

*** Finishers

* with star mask on, pump star saturation

* LHE kernel 24 contrast 1.5, blend 50% with original image

* MMT sharpen, 6 layers biases 0.05 0.05 0.025 0.025 0.012 0.005 on luminance

* on a clone, apply EZDenoise with no modifications. Meld back into original image by veil_clone * meteor_mask + (1 - meteor_mask) * veil

* desaturate meteor slightly