There is a second Messier globular cluster in hercules beside Messier 13. It is Messier 92. This one is a bit smaller than M13 and i did not take a photo of it before this session.
I am still fighting some technical issues and therefore I switched to my Baader refractor instead of using the VC200L to keeps a few things a bit easier.
I did some backlash optimization on my mount before the session. But lets see what happend.
Session Analysis
I started the session around 23:20 and started to take photos after I did all the start-stuff. As you can see at around 23:30, I had bad guiding trouble (look at the red line). I tested it a few times but it did not get better.
A: At the “A” position I did some RA-axis backlash adjustments and started anouther try. As you can see at arount 00:20 I still had problems.
B: At the “B” position I did some Dec-axis backlash adjustments.
After that I was ready to go!
I started collection photos at 12,5°C and stopped in the early morning at about 9°C.
While shooting 300s subs the system did an automatic meridian flip and several refocus processes.
Full resolution on Astrobin:
Technical overview
| Telescope | Baader Travel Companion 95/580 |
| Focal Length | 590mm |
| Erecting Lense | Baader M68 Field Flattener |
| Camera | CANON EOS R(a) |
| Guiding Equipment | Pegasus Astro Indigo OAG |
| Guiding Camera | QHY 5-III-462C |
| Mount | Skywatcher HEQ5 Pro, Belt and Hypertuned |
| Photography Date | 06/09/2024 |
| Exposure-Time Lights | 30×300 |
| Correction frames | FLATS, BIASES, DARKS |
| Sensitivity | ISO 1600 |
| Processing Date | 06/13/2024 |
| Software Stack | Stellarmate OS/EKOS/INDI, PixInsight, Affinity Photo |
| Capture Place | Koblenz, Germany |
