Finally I could get a few minutes of clear sky with view on our current visitor, comet C2022 E3(ZTF).

It is currently heading for its closest approach to earth in this orbit. Next time it will visit the inner regions of our solar system will be in 50000 years or so.
Although observation time was short and quite some clouds passed through the field of view, this image shows clearly the straight ion tail, which points away from the sun, created by the solar wind. It mainly consist of CO+ ions and shines in a bluish color (not so clear inn this image). The more diffuse coma around its core is a mixture of gas and dust evaporated by the sunlight from the comets surface. It has a green component containing large amounts of CN and C2 molecules, which are excited by the sunlight and re-emit the absorbed light at specific wavelengths in the green part of the spectrum. The other component has a more yellowish or brownish color. It consists mainly of dust particles pushed away by sunlight – just reflecting sunlight.
The comet has already passed its closest distance to the sun and the further it gets away, the weaker its tails becomes.
This image was taken in the early hours (UTC) of January 20th, 2023.

Celestron RASA 11 v2
Celestron CGX-L mount
RisingCam ATR3CMOS26000KPA
Optolong UV/IR Cut filter
Bortle 4-5
No moon, but clouds passing all the time, and still pretty low above horizon.
264x10sec (44m)

PixInsight