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comet and spectroscopic observations on 20 april

a nice clear sky, but unfortunately a lot of wind with gusts up to 60 km/h. I tried to observe some comets, but unfortunately I had to stop at 1 comet because of problems with the mounting/telescope due to the gusts of wind. The mount went into safety because of too much deviation and then stopped. I was only able to observe comet C/2019 Y1 (ATLAS). With the C11 and LHiResIII spectrograph, this is less of a problem because it is mounted in a slit dome. So the wind has less chance to disturb the observations. Two spectra of Be starren were recorded: CQ Uma (HD 119213) and z Her (HD 162732). Each time 1 hour was recorded with 3 x 1200 sec. exposures.

comet and spectroscopic observations on 15 april.

Initially there was quite a lot of cloud cover and no ideal conditions to observe, around 23h local time, it was better and the high clouds slowly disappeared. SQM went to 19.15 which is very good in my area. Two comets were observed C/2017 T2 and C/2019 Y4. With the spectroscope 3 Be stars were observed: Cap Dra, HD 20134 and eps Cas. I made also an update of the Af(rho) plot of comet C/2019 Y4 (ATLAS) and put it on my website.