between periods of clear periods and cloudy weather i could catch 4 comets for follow-up: 21P, C/2017 M4, C/2017 S3 and C/2018 C2 . quality isn’t very well due cirrus clouds and high humidity and high light-pollution. area around comet C/2017 S3 was about SQM of 16.5 !
comet- and spectroscopic (Be-stars) observations during night 26/27 june 2018
During the clear night but with almost full moon, several observations are made of comets: 21P, 37P, C/2015 O1, C/2017 K2, C/2017 M4, C/2017 S3, C/2018 C2. Also with second setup: C11 + L200 spectrograph with 1800 l/mm grating are following Be-stars observed: HD195907 and V568Cyg .
comet and spectroscopic observations (Be-stars) during night of 25/26 june 2018
several comets are observed during nihgt 25/26 june: 21P, 37P, C/2015 O1, C/2017 K2, C/2017 M4, C/2017 S3, C/2018 C2 and object ZMB936E mentioned on the CP of MPC – images are astrometric and photometric measured and send to MPC. For some comets are also the Af(rho) parameter obtained from CCD-images with R-Bessel filter (CARA approach). With the second observatory (BRIXIIS-II) are some Be-stars observed + VV Cep with C11 + L200 spectrograph with 1800 l/mm grating: VV Cephei, HD206773 and z Hercules .
comet and spectroscopic (Be-stars) observations during night 21/22 june 2018
comet and spectroscopic (Be-stars) observations during night 20/21 june 2018
During a clear night of 20/21 i did observations of some comets and observations of possible comet menioned on the PCCP (magnitude 19.7): comets which are observed are: 21P, C/2015 O1, C/2016 N4, C/2017 M4, C/2018 C2. Possible comet was found in the images and astrometry send to MPC to improve the ephemerides of this possible new comet. With the C11 + L200 spectrograph, 3 Be-stars are observed: 48 Lib, cx Draconis and EW Lac.
new comet P/2018 L4 (PANSTARRS) – observation of 20 june
Comet P/2018 L4 was discovered by R.Wainscoat and found on images taken on June 8.5 UT with the 1.8-m Pan-STARRS1 Ritchey-Chretien telescope at Haleakala .
This object was also observed by myself with my 0.4-m f/3.8 AG16 telescope, while it was mentioned on the PCCP of the minor planet center on 20 june 2018. I took 20 x 120sec. Exposures and found after stacking this object as well. I have send the astrometric data and comment of the cometary appearance to the minor planetcenter on 21 june 2018. Later on 22 june 2018, this object was assigned as P/2018 L4 (PANSTARRS) with CBET 4527: 20180622 : COMET P/2018 L4 (PANSTARRS) issued on 22 june 2018
comet and spectroscopic observations of Be-stars in night 18/19 june 2018
Comet observations via BRIXIIS-I observatory in night of 18/19 june. Comets which are observed are: 21P, C/2014 OE4, C/2015 O1, C/2016 N4, C/2017 K2, C/2017 M4 and C/2018 C2. spectroscopic observations are obtained with BRIXIIS-II observatory equiped with C11 + L200 spectrograph with 1800 l/mm grating (Res.power > 10.000). Be-stars which are observed are: HD192044, QR Vul and HD195554.
spectroscopic observations of Be-stars on 13 june 2018
During the night of 13/14 june, several spectroscopic observations are obtained with the C11 + L200 spectroscope with 1800 l/mm grating. Observed stars are: P-Cygni, gam Casseopeia, QR Vulpecula
spectroscopic observations of Be-stars on 6 june 2018
H-alpha detail, high resolutions spectroscopic observations with L200 spectrograph and 1800 l/mm grating (R > 10000) are made in the evening/night of 6/7 june: 66 Ophiuchi , HD 202904 and also VV Cep (not a Be-star).
observations of comets and spectroscopic observations of Be-stars on 5 june 2018
Several comets are observed for astrometry, photometry and Af(rho): comet 21P, C/2015 O1, C/2017 M4, C/2017 S3 and C/2018 C2
Also spectroscopic high resolution (H-alpha detail) of some Be-Stars: gamma Casseopeia, kappa Draconis and omicron Andromedae.