Observation by Grant Privett: Gyulbudaghian

Uploaded by

Grant Privett

Observer

Grant Privett

Observed

2026 Apr 25 - 02:00

Uploaded

2026 Apr 25 - 12:42

Objects

Gyulbudaghian's variable nebula

Equipment
  • C14 + f/6.3 reducer
  • SX Trius 694
Exposure

12x 600s

Location

Near Salisbury

Title

Gyulbudaghian

About this image

I managed to get outside about 23:30 and spent over an hour trying to get TheSkyX to do PEC. That was a fight - their documentation seems shoddy to me and the interface not well thought out. I think I managed it, but for all I know it went away when I closed down the software. Anyway, trained it on 2 cycles and its RA residuals are <1 arc sec.

Thought I would try something I knew well and chose Gyulbudaghian's nebula as a test. It was starting to rise above the murk in the east by the time I was ready. Took 14 shots but the last two were damaged quite badly by satellite trails. Stacked what I had and am reasonably happy with how it came out - espcially with the left side of the main arc extending up toward the image top and curving to the right.

I platesolved the image and after calculating a Zp, I reckon there are stars in the secene down to mag20.8. So if I had done the same when it was overhead I would be looking at mag 21. Quite happy with that. Really had not expected to get 10 minute exposures without an OAG. I think the 80 star T-Point model is helping. 

Forgot to take short images to measure PV Cepheis brightness though!

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