2020-04, comets from city center.

Tried to image a couple of comets from my parents’ backyard, a 5 minute walk from my own apartment. With over 200,000 inhabitants the light pollution in the city of Almere is huge. Naked eye limit is approximately magnitude +4, so visual observations are limited to the moon and planets. Nevertheless I was succesvol in imaging the currently visible comets: C/2017 T2 (PANSTARRS), C/2019 Y1 (ATLAS) and C/2019 Y4 (ATLAS). Equipment used was a William Optics Star 71 telescope (71mm, f=348mm) and EOS R camera mounted on a Rainbow Astro RST-135 mount. Also tried the new software for the Staraid autoguider with the new option guiding on objects like comets. For the last images I installed my good old IDAS Light Pollution Suppression filter inside the telescope.

Continue reading

2019-11-11, Mercury transit.

Planned my holiday to La Palma (the Canary Islands) as to coincide with the Mercury transit. The weather was very sunny, but incredibly windy. I could only observe the start of the transit as the seeing grew worse and worse every minute. In fact the observatory on the Roque de los Muchachos issued a storm warning. I shot the transit from start to finish but only the images from the first 30 minutes were usable.

All images where shot with a Canon EOS 70D, paired with a Canon EF 300/4 @f/10 and Extender 2x-A, ISO125, 1/6400s.

2019-07-21, bright NLC’s.

Extremely bright and extensive NLC display. At the start, NLC’s were visible in the south at 45 degrees.

20190621, 21.41UT, Canon 6Dii, 8mm, F4, 2s, ISO100.
20190621, 21.37UT, Canon 6Dii, 20mm, F4.5, 2s, ISO100.
20190621, 21.50UT, Canon 6Dii, 135mm, F4.5, 2s, ISO100.
20190621, 21.53 UT, Canon 6Dii, Sigma 135mm ART, F4.5, 2s, ISO100.
Timelapse 21.41 and 22.14 UT consisting of 281 exposures with a Canon 6Dii and Sigma 135mm F4 ART lens, 2sec. at ISO100.
Timelapse 21.12-22.21 UT. Canon 6D, Sigma 50mm ART, F4, ISO100, 672x1s.