C/2020 F3 - A cross section through the coma

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Robin Leadbeater
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C/2020 F3 - A cross section through the coma

Post by Robin Leadbeater »

A (sky subtracted but uncorrected for instrument response) spectrum image showing a cross section through the coma, taken 20200713.985 with the ALPY600 (An extreme non linear gamma contrast stretch had been applied to reveal the outer regions while not saturating the inner coma) Click on the image to see it full size
F3_NEOWISE_20200713_coma_section_ALPY600_raw_skysub_annot.png
Although very intense, the sodium emission is confined to a narrow region of the central coma, particularly compared with the CN band which is visible well beyond the dusty region.

Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
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