Hemisphere:  Southern  ·  Constellation: Piscis Austrinus (PsA)  ·  Contains:  Solar system body or event
Getting plate-solving status, please wait...
C/2021 A1 (Leonard) + Animation, 2 Jan 2022, 



    
        

            Igor Chekalin
C/2021 A1 (Leonard) + Animation, 2 Jan 2022
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C/2021 A1 (Leonard) + Animation, 2 Jan 2022

Getting plate-solving status, please wait...
C/2021 A1 (Leonard) + Animation, 2 Jan 2022, 



    
        

            Igor Chekalin
C/2021 A1 (Leonard) + Animation, 2 Jan 2022
Powered byPixInsight

C/2021 A1 (Leonard) + Animation, 2 Jan 2022

Acquisition details

Basic astrometry details

Astrometry.net job: 5363139

RA center: 21h38m03s.6

DEC center: -35°4109

Pixel scale: 1.033 arcsec/pixel

Orientation: 180.762 degrees

Field radius: 0.536 degrees

Resolution: 3108x2071

File size: 7.2 MB

Locations: Brisbane, Toowong, QLD, Australia

Data source: Backyard

Description

Leonard Comet, 2 January 2022.
Image was taken in the twilight when comet was 27°-17° above the horizon.

96 x 30 sec (LRLGLB sequence, 48x Light, 16x R G and B at gain 100)
Guided by comet's core, no dithering (key point for processing used).

Gif / Video is L sequence animation colored by comet's RGB layer.
Video at good quality is on YouTube (Please watch 4K resolution, compression is killing low contrast moving details)

Post-rocessing algorithm is the same as previous photo:

1) Weighted sum with strong sigma clipping to make comet-only image.
2) Subtract (1) from each raw frame getting stars only image with comet subtraction error artifacts
3) Aligning (2) by stars
4) Stack (3) with strong sigma clipping getting rid of residual comet core artifacts.
5) Combine (1) and (4) via simple addition.

Hardware & Software is the same too:
Tal-250K with F/6 reducer MkII, ASI2600MM camera with ZWO filters, EQ6PRO mount. Balcony in Brisbane.

Software: APT, PHD2, Iris, FITStacker, Photoshop

Comments

Revisions

  • Final
    C/2021 A1 (Leonard) + Animation, 2 Jan 2022, 



    
        

            Igor Chekalin
    Original
  • C/2021 A1 (Leonard) + Animation, 2 Jan 2022, 



    
        

            Igor Chekalin
    B

B

Title: Animation

Description: GIF Animation

Uploaded: ...

Sky plot

Sky plot

Histogram

C/2021 A1 (Leonard) + Animation, 2 Jan 2022, 



    
        

            Igor Chekalin