M20 Trifid Nebula (John Richards)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: B85 · HD163811 · HD163919 · HD163936 · HD163980 · HD164002 · HD164018 · HD164030 · HD164068 · HD164193 · HD164225 · HD164294 · HD164384 · HD164402 · HD164452 · HD164492 · HD164514 · HD164534 · HD164637 · HD164704 · HD164717 · HD164718 · HD164739 · HD164766 · HD164767 · HD164833 · HD164864 · HD164971 · HD165051 · HD313506 · And 69 more.

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M20 Trifid Nebula

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M20 Trifid Nebula

So sometimes you look at the weather and it's supposed to be clear all night, and your confident that your equipment is working well and the last 10 times you have set it up, everything has worked perfectly, but then you go out and things just don't seem to work out the way you thought they would. I planned to have 3 hours of data on the Veil Nebula last night with clear skies predicted after about 10PM. So I set up my portable rig ( AT72 on the SmartEQ Pro +), polar aligned, focused on Vega, looked towards the Veil Nebula and clouds were passing through. No problem, selected my secondary target, M20, which was clear. Began imaging and went inside to monitor. After about 10 images, looked and guiding had gone to astronomical numbers and the last image had long trails. Went outside expecting to see clouds, there were none. I found the ASIAIR hanging by the wires from the scope. The sticky on the Velcro had lifted and the ASIAIR had fallen off the scope. Went inside, found a Velcro loop and secured the ASIAIR back on the scope. Re-slewed to target, re-calibrated guiding, started imaging again. Went inside and noticed it was nearly Meridian Flip time. Back outside, watched while the ASIAIR automatic flip executed. It failed, though it had always worked before. OK, did everything manually, reacquired M20, recalibrated guiding and began again. Went inside, after a few images, I noticed guiding went South again. Go outside, this time it is clouds, lots of them. So I shut everything down and disassemble and bring everything inside. So, instead of 3 hours, I got 45 minutes of data. Decided to post it anyway. I did linear processing in APP and Non-linear in Pixinsight.

Imaged with APT

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Status	Advanced success
Started	...
Astrometry.net job	3673827
PixInsight job	ARIIJVHMLYHHVG6V80CEUG9XKWFPZU62
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h02m28s.54
RA (top/left)	18h05m51s.20
RA (top/right)	17h59m41s.81
RA (bottom/right)	17h59m04s.76
RA (bottom/left)	18h05m16s.89

Dec (center)	-23°01′14″.9
Dec (top/left)	-22°39′14″.3
Dec (top/right)	-22°26′47″.6
Dec (bottom/right)	-23°23′11″.6
Dec (bottom/left)	-23°35′41″.8

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M20 Trifid Nebula

M20 Trifid Nebula

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M20 Trifid Nebula

M20 Trifid Nebula

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