First HDR image using bracketing - Moon Halo with Mars

To capture a halo around the Moon I applied bracketing using my Nikon D7500. Postprocessing was done using all 5 "bracketing" images with CS4 (Menu Automatic, Merge to HDR). Once the image is made, some minor editing and noise reduction was done. The final image has some more details using this HDR technic.

Moon Halo with Mars

Freezing temperatures and a Moon with a 360° Halo and Mars. Image taken with Nikon D7500 and bracketing setting. 

Comet C/2023 A3 Tsuchinshan-Atlas reworked APP

I reworked my images of Comet C/2023 A3 Tsuchinshan-Atlas using APP v2.0.0 beta 29 with MAD setting.

Settings APP:

Integrate : Median

Filter MAD rejection

Kappa Low: 8

Kappa High: 2

Comet C/2023 A3 as seen by the STEREO-A SECCHI HI-1 coronagraph.

Comet C/2023 A3 as seen by the STEREO-A SECCHI HI-1 coronagraph. Striations can be seen in the dust tail, and interactions between the faint ion tail and the solar wind can be observed.
The solar Corona was subtracted out to show the solar wind more clearly. The contrast of the comet tail and the solar wind was enhanced with local histogram equalization.
The vertical lines above Venus on the left and the comet are saturation artefacts from the CCD sensor.

Credit: NASA / STEREO-A / SECCHI HI-1 / Simeon Schmauß
processed from the raw data: secchi.nrl.navy.mil/postflight/hi_1/L0/a/img/20241004/

Click on picture to start video

My input: these images show aswell how to interpret the antitail of the comet.

Heliophysics Big Year - Coffies

 

I followed an online solar lecture as part of Nasa's Heliophysics Big Year. When searching for more solar lectures I found following previous recorded lectures :

* The Sun touches everything - see this link
Dr Shea Hess-Webber, Stanford University

Prof. Amy Keesee, University of New Hampshire

Erick Powell, Boston University
This lecture is aswell part of Coffies Seminars (Consequences of Fields and Flows in the Interior and Exterior of the Sun

* Solar Cycle 25 by Dr. Lisa Upton, Southwest Research Institute - see this link

New astrobooks

I bought two second-hand astrobooks in "De Slegte" :

- Witte gaten (translated from Buchi bianchi) from Carlo Rovelli and

- Het tijdperk van onzekerheid (translated from Das Zeitalter der Unschärfe) from Tobias Hürter 

With those two books my library counts 65 astronomical books.

Compilation video of Comet C/2023 A3 Tsuchinshan-Atlas

I made a video of my best images of Comet C/2023 A3 Tsuchinshan-ATLAS. Click on the picture below to start the video; video is best seen on your PC