comet and spectroscopic observations on 29 july
during this clear night (SQM – zenit here about 19.25) i observed comets with the 0.4-m f/3.8 corrected newton: 29P, 68P, 260P, 114P (not detected), A/2019 K6 (not detected), C/2016 R2, C/2017 E3 (not detected), … Read more