Partielle Sonnenfinsternis vom 29. März 2025
Trotz dichter Wolkendecke und Regen, gelang es mir für einen kurzen Augenblick die partielle Sonnenfinsternis am 29. März 2025 von Meilen (Schweiz) aus zu beobachten. Das beeindruckende Naturschauspiel zeigte sich nur kurz, aber umso schöner war dieser flüchtige ...
Observing comet C/2023 A3 (Tsuchinshan-ATLAS) in late October 2024
On the evening of October 21, 2024, around 20:30 local time (Switzerland), I had the opportunity to observe the comet C/2023 A3 Tsuchinshan-ATLAS. Using my Nikon Z7 camera equipped with an AF-S Nikkor 24-70mm lens, I managed to capture the celestial visitor as it made ...
Wondering how Mars looks like through a telescope?
A few days ago, on January 30, 2023, I captured Mars using a webcam (SPC900NC) attached to the Westerlund 90cm Telescope in Uppsala, Sweden. The focal length in the Nasmyth focus is 9 meter. The pixel size of the camera (5.6μm) thus leads to a pixel scale of ...
Finally! Comet C/2022 E3 (ZTF)
After desperately waiting for two weeks in a row, the weather here in Uppsala finally improved and we could observe the famous comet C/2022 E3 (ZTF) with our rooftop telescope at the Angström Laboratory, the so called "Westerlund Telescope". As the comet just ...
Improving the periodic error and guiding ability of a Losmandy GM8 mount
Why bothering about improving Losmandy's GM8 mount Fig. 1: Losmandy GM8 guide star drift while auto-guiding. Overall the mount produces round star images and guiding works. However, the guide star drifts are relatively large (compared to seeing). As mentioned ...
Using an MGEN v2 Autoguider on a Losmandy mount with 492 Digital Drive System
Why I bought a Losmandy GM8 mount Figure 1: Analysis of guide star positions when using the MGEN autoguider on a Skywatcher EQ5 Pro mount. The green circles indicate the offsets in arcsec of the guide star in RA, while blue diamonds show the offsets in DEC. The ...
