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I decided to dedicate a night to measuring comet spectra with the ALPY 200 and managed five of them, (104P (Kowal) , C/2019 L3 (ATLAS), 67P Churyumov-Gerasimenko, 116P Wild, C/2020 V2 (ZTF) ), picking them off as they crossed the meridian. They were too faint to guide on so I used the comet guiding feature in PHD2 to keep them on the slit during a total 1 hour exposure for each. Spectrum images here
https://britastro.org/observations/observation.php?id=20220313_000333_3d9c87ea7e24b988
Cheers
Robin
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