It promises clear skies for the whole night and the moon phase is now about 0.35, so also less disturbing. I had prepared the observatory and set up a whole programme of observations. However, around 1 a.m. the focuser refused service and further observations stopped. The following comets could still be observed: 13P, 125P, C/2019 T4, C/2021 S3, C/2021 X1, C/2022 U1, C/2023 V4. In the evening i could simultaneous obtain 2 spectra in high resolution in the H-alpha area of Be-stars: 28 Cyg ( 4 x 1200 sec exposures) en pi Aqr ( 3 x 1200 s. exposures) (observations made with C11 + LHIRESS III spectrograph with 2400 l/mm grating)
spectroscopic observations on 14 july
During this clear night, i obtained High Resolution ( R~15.000) spectra of Be-stars for the H-alpha region: V1339 Aql, V1466 Aql.
comet and spectroscopic observations on 10 july
spectroscopic observations on 7 july
During a short period of clear sky, i could obtain a high resolution spectra for H-alpha region of Be-star QR Vul.
comet and spectroscopic observations on 19 june.
the nights are now about the shortest of the year. It only gets really dark around 0:30UT. It was pretty much clear, with a cloud here and there. The 95% moon was interfering though, resulting in only an SQM in the zenith of 18.8. 2 comets: C/2019 T4 and C/2021 S3 were observed. 2 spectra of H-alpha region in high resolution, of Be stars: 58 Cyg and HD 208682 could be obtained.
comet observation on 11 june
Meanwhile, the nights here are already short and it only gets dark around 0h30, which is why I already start observations at dusk. I was able to observe comet C/2023 A3.
spectroscopic observations on 9 june
This evening I was able to obtain a spectrum from Be-ster V421 Cep.
spectroscopic observations on 26 may
Between the many showers and thunderstorms, there was a brief clearing and I was able to obtain 2 spectra with the C11 and LHIRESS III spectrograph. The 2 Be stars where a spectrum was obtained in H-alpha region and high resolution are: tet CrB and nu Cyg.
comet and spectroscopic observations on 22 may
nights are getting very short and I could only start observations of comets and spectroscopy of Be stars around 11pm. Comets I observed are: 29P, C/2023 A3, C/2023 H5. The nearly full moon is quite disturbing especially with the humid air. Spectra that could be obtained in H-alpha region and high resolution (R~~15000) are: omi Hercules and HD 175863. (data can be found in the BeSS database)
spectroscopi observations on 20 may
rather poor conditions for observing comets, so I decided to do only spectroscopy and was only able to record 1 spectrum of Be-star V521 Lyr in high resolution and H-alpha region
