Lunar Landscapes: Rupes Recta (MrCrazyPhysicist)

Lunar Landscapes: Rupes Recta

Acquisition type: Lucky imaging

The Rupes Recta, a linear escarpement located in Mare Nubium, together with crater Bert and Rima Bert, captured on the morning of Sep 7th 2023 with poor-fair seeing (~ 4-5 on the Pickering Scale) according to this Capella star test. The video capture of Rupes Recta with MP4 and YouTube compression is available here.

Processing of the IR data is based on the tutorials Processing Lunar images with Photoshop by Damian Peach and Imaging the Moon: Capture and Process, Stack, Sharpen by Refreshing Views.

If you want to process the data yourself, I uploaded the raw stacks straight out of AS!3 here.

07.09.2023 (03:53 UT)

Equipment

Celestron C14 Edge HD @ f=6650 mm (F/28), res = 0.09"/px
+ Celestron CGE Pro mount
+ Celestron EF
+ ZWO ASI 290 MM
+ Baader 2x VIP Barlow
+ ZWO EFW
+ Baader IR (685 nm) filter
+ Tempest Cooler
+ Omegon Dew Heater
+ Astrozap Dew Shield for C 14

Very short imaging train: I simply screwed the Baader VIP Barlow into the nose piece of the ZWO EFW. However, the small pixel size of the ZWO ASI 290 MM leads to a pixel scale of 0.09"/px at a reasonable f-ratio of f/28.

IR: 5000 frame SER movie
1x1 bin

recorded with Firecapture

Moon 58° above the horizon
Seeing: Pickering 4-5 (poor - fair)

Postprocessing

IR

Autostakkert!3:
- Stacking 500 of 5000 frames
- Image Stabilization: Surface, Improved Tracking, Cropped
- Quality Estimator: Laplace, Noise Robust 5, Local
- Reference Frame: Autosize
- Minimum AP size = 104, Min Bright = 20, Multi-Scale

Registax:
- histogram correction to increase the brightness of the underexposed image
- wavelet sharpening using Wavelet filter Gaussian, step increment = 0, no linked wavelets:
layer 2 - 100, denoise & sharpen

Photoshop CS2:
- image crop
- level corrections to clip the black levels of the shadows
- unsharp mask (amount: 21%, radius: 1.9 px)
- sharpen
- slight noise reduction

Schwentinental (Germany)

-CS Daniel

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