comet and spectroscopic observations on 29 may
with the 0.4-m f/3.8 newton telescope is observed some comets: C/2017 K2, C/2020 M5, C/2020 R4, C/2020 T2, C/2021 A1. With the C11 + LHiResIII spectrograph, i could take spectra of following stars: nova V1405 … Read more