a clear evening again, i could observe some comets: C/2020 R4, C/2020 T2, C/2021 A1. High-resolution spectra could obtained from following stars: omi Her, gam Cas (H-alpha detail), gam Cas (HeI-detail @ 6678 Å).
a clear evening again, i could observe some comets: C/2020 R4, C/2020 T2, C/2021 A1. High-resolution spectra could obtained from following stars: omi Her, gam Cas (H-alpha detail), gam Cas (HeI-detail @ 6678 Å).