Contact information

Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

Mars - 30.7.2020 at 02.00 Hyvinkää Observation number 92418

Visibility III / V

Timo Inkinen, Ursa (Etelä-Suomi)

Here would be my first attempt this season to capture Mars with my TMB 152/1200 lens tube. I monitored it for the morning with tripod adjustments (I ran the PEM Pro repair run for follow-up) and while I was still refreshed around two o’clock, I decided to try shooting Mars with my ASI 183MM Pro black and white camera. Here, the end result would be to extract 450 frames from a video frame delimited by 5006 in the center of the image area to the final image. The colors in the picture I made in PhotoShop.

I also looked at Mars visually after shooting using 335x and 432x magnifications and noticed that the Baader 2 "prism I use makes a slight distraction in the visual image at the edge of the planet (red border on one side and blue border on the other). I googled this explanation for that phenomenon.

This tip for planet mapping was also found in that discussion:

"I still recommend that people use a Barlow or the Baader GPC before a binoviewer or a prism Diagonal for Planetary or high resolution work ."

In practice, I didn’t run into that optical error when photographing this because I was shooting this image of Mars without a prism, but for visual viewing of Mars, I would have to change my lens tube to a normal angle mirror. Seeing was both so calm in the morning that I could watch a relatively calm picture of the planet, but the videos I shot were "normal" jumping.


Additional information
  • Observation target
    • Mars
    • Keskitaso
  • Seeing
    • Good
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