24 October 2018
 
Comet 21P Giacobini-Zinner

    
    



By Jean-Baptiste Auroux
( https://www.astrobin.com/users/Jean-Baptiste_Paris/
)

 LRGB version + study of the core of the comet.
 LRGB version:
 L : 20 x 60s bin 1 ; 10 x 120s bin 1 ; 10 x 300s bin 2
 RGB : 3 x (10 x 60s) bin 2
 2 stacks for each serie : one on stars, the other one on the comet (with Pixinsight)
August 21 2018, 4h08am (reference image for stacking).
The comet was then distant of 0,45 AU (0,68 million km) from Earth.
 Analysis of the core :
 Stack of 20 images 60s L bin 1, comet alignment.
 Rotational gradient processing + coded-colors visualization.
 Set-up : Takahashi TSA102 - AZEQ6 - Atik One6 - LRGB filters
 Fouras (France)

 

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