comet and spectroscopic observations on 25 april

during this evening , with disturbing moonlight) i could observe some comets: 168P (not found), C/2010 U3 (not found), C/2020 T2, C/2020 V2, C/2021 A1. With the high resolution spectrograph i could obtain spectra of following stars: gam Cas (H-alpha detail @ 6562.8 Å), gam Cas (HeI detail @ 6678 Å), Alfirk, 53 Boo, 45 Cas.

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Vivaldi