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Elephant Trunk Nebula L-eNhance Reprocess, 


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Elephant Trunk Nebula L-eNhance Reprocess

Technical card

Imaging telescopes or lenses: Astrotech 92 Triplet AT92mm f/5.5

Imaging cameras: ZWO ASI071MC PRO CMOS OSC

Mounts: Orion Azeq Atlas pro

Guiding telescopes or lenses: ASTRO TECH AT66ED Guiding

Focal reducers: Astro Tech Field flattener

Software: PixInsight  ·  Stark Labs pHD guiding PHD2  ·  EQMOD, Stellarium, Stellarium Scope, PHD, Backyard EOS, Astro Tortilla Nebulosity 4

Filters: Optolong L-eNhance 2"

Accessory: Pegasus Astro Dual Motor Focus Controller Cube focuser

Dates:June 27, 2020June 29, 2020June 30, 2020

Optolong L-eNhance 2": 113x300" (gain: 90.00) -1C
Optolong UV-IR: 108x120" (gain: 90.00) -1C

Integration: 13.0 hours

Darks: ~20

Flats: ~30

Bias: ~50

Avg. Moon age: 8.28 days

Avg. Moon phase: 59.15%

Bortle Dark-Sky Scale: 7.00

Mean SQM: 18.48

Astrometry.net job: 4225378

RA center: 21h 39' 7"

DEC center: +57° 29' 30"

Pixel scale: 0.967 arcsec/pixel

Orientation: 93.231 degrees

Field radius: 1.498 degrees

Resolution: 6384x9144

Locations: Home backyard red turning white zone Bortle 8, Gilbert, Az, United States

Data source: Backyard


A reprocess from my image I posted last June. I processed the L-eNhance and Uv-Ir data seperately. I used ArcsinhStretch to stretch both to nonlinear. This helps to keep the stars colorful and tighter. Then combined both with Pixelmath. 60% L-eNhance to 40% Uv-Ir. I am really liking this method of stretching.