Newest observations
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Lempäälä, Sääksjärvi, Landscape image of a planet
I
19.3.2023 at 20.03 -
Kokkola, Kälviä, One halo form
I
19.3.2023 at 17.15 -
Rovaniemi, One halo form
I
19.3.2023 at 16.00 -
Kemijärvi, Several halo forms
II
19.3.2023 at 15.30 -
Kittilä, Several halo forms
II
19.3.2023 at 14.35 -
Pello, Starlink G2-7
I
19.3.2023 at 05.00 -
Oulu, Haukipudas, Starlink
I
19.3.2023 at 04.47 -
Tornio, Starlink G2-8
I
19.3.2023 at 04.40 -
Vaasa, A fireball at night, as bright as a full moon
III
19.3.2023 at 00.07 -
Vaasa, A fireball at night, brighter than the venus
III
18.3.2023 at 23.04 -
Peltovuoma, Enontekiö, A fireball at night, as bright as a full moon
III
18.3.2023 at 21.10 -
Muonio, A fireball at night, as bright as a crescent moon
III
18.3.2023 at 21.00
Contact information
Visibility III / V
Jorma Ryske, Etelä-Suomen kosmol. seura
Comet C/2022 E3 (ZTF) is quite close to Earth at 0.48au / 72 million km, and the comet is beginning to fill the cell of the longer focal length imaging equipment. Attached is a plate-corrected image where the size of the image field is 36'x28', corresponding to an image field of 750,000 km X 590,000 km at the comet's distance, the grid spacing in the direction of RA and Dec is approximately 210,000 km.
Picture 1) Clear filter, 4x1min=4 minute exposure. A broad particle tail and two ion tails going in slightly different PA directions stand out. The ion tail in the direction of PA 301deg is mainly CO+ ions based on the observations of professional researchers.
Figure 2) R filter, 660nm/80nm. 10x2min exposure, inverted. The ion tails stand out weakly, the ions visible in the R region are possibly H2O+ ions
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