Sunday, December 21, 2025

20251220 Another Clear Night (Unexpected)

The power cables were not still not good, but can be used due to the clear sky!   Need to fix it later!

The bigger setup is pointing at the Western Veil (NGC 6090), for 23 frames of 5 minutes.  I cooked, I went out, and then dinner during the process.

Swing back to M81/M82 later at around 7:30pm, (will remain for one or two hours), finally got 31 frames of 5 minutes.   I tried to go to IC 434 but then the power cable disconnect itelf.  Call an early ending.

The S30 will be spending time with M33.  Finally got more than three hours of exposure.

Allow me to put the unprocessed stacked below first, I shall gather even more.

Will switch to IC 434 when it goes higher up at around 21:40, and the cloud on that side cleared up especially when compare with the north where M81/M82 were.  

Will stay there for the rest of the night, hopefully will get more than half an hour of photons.  

Finally got well over one hour of data, will be processed later together with previous and future signals.

Observation note:  

1.  Autofocus failed several times.  I found that it's due to the fact that the motorised focuser was at the end of its travel limit.  

2. The new power cables was no good yet, I will have to do the soldering again.  May drill a small hole in the conductor and insert the wire inside before soldering.

3. The setup was left unattended from 17:40 to 18:30 at least since I will need to pick up my daughter.  No meridian flip is pretty safe, no rain hopefully.  (No problem at the end)

4. Veil nebula was a bit low after 7:30pm these days.

5. Polar alignment: swinging a bit from the zero position helps on finding brighter stars.

6. A layer of cloud can be detected from around 9:10pm, guiding star sometimes lost, signal reduced but I will keep on anyway.

7. I expect the field of view from my S30 is similar to that of my bigger rig, but I never compare.  I did compare them finally and they are indeed very similar.


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