Long ion tail

Forums Comets C/2020 F3 (NEOWISE) Long ion tail

Nick James

Attached is the blue channel of my widefield image last night (Sony A7s, 50mm f/1.8 lens). The FoV is around 40 x 27 deg and the subs are stacked on the comet’s motion. It was hazy last night and I have horrible gradients to get rid of. Also my flat field hasn’t worked properly. This shows up as concentric rings in the sky background. I need to redo the flat and do some more fiddling to get an image but this shows an ion tail around 25 deg long.