© Frank Stefani Photo Art
October 13, 2023 is a surprisingly clear day, and the announced cold front pass is a long time coming. Short-range forecasts from many weather services, animations provided by satellites, as well as webcams mounted on our mountains operating at high altitudes 24/7, which provide a good long-distance view of what may be coming from the west, give hope. In a well clear sky. In the second half of the night. And all around the new moon! The nights are now much longer and you can start taking photos earlier. My recording series starts at 9:15 p.m. The exposure period is scheduled to be 6 hours for “cave fog” (Sh. 2-155), noting that the clouds will arrive at 3 a.m. at the latest. I set my alarm for 3am, but I wake up at 2:30am and immediately see that the clouds are approaching the mountains and the camera can see almost nothing. I log in via VNC to the RasPi 4 (with Astroberry OS) which is doing its thing abroad and look at the recent images. The last 23 of the planned 180 images are unusable. At least 157 individual images remain, each with an exposure time of two minutes. After stacking up with Siril, things look very realistic in Asinh Autostretch: lots of stars, barely any fog. In fact, the detail becomes tedious. I have to reorganize several times, do something different, start over and use different software, otherwise one or two details can’t be worked out. Here I show what I’ve been able to work on so far…and now I’m taking a creative break.
Data about the image
| [email protected] | |
| Goal | Sh2-155 / Cave Mist |
| location | Garmisch-Partenkirchen |
| time |
October 13, 2023, 9:30 PM CEST |
| camera | Zoo ASI533MC Pro |
| Telescope/lens | Askar FRA 500 APO Astro |
| Multiple | Ioptron CEM26EC |
| Exposure time | 157 x 120 seconds = approximately 5:15 hours |
| Post-processing | Linux: Cyril + Star Tools + Darktable |
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