Getting plate-solving status, please wait...

IC 1396: Elephant Trunk Nebula (aka. The Cursed Project)

Technical card

Resolution: 3450x4500

Dates: July 17, 2017July 19, 2017

ZWO H-alpha 7nm: 22x300" (gain: 150.00)
ZWO OIII: 15x300" (gain: 150.00)
ZWO SII 7nm: 17x300" (gain: 150.00)

Integration: 4.5 hours

Avg. Moon age: 23.97 days

Avg. Moon phase: 31.59% job: 1730572

RA center: 323.680 degrees

DEC center: 57.623 degrees

Pixel scale: 0.904 arcsec/pixel

Orientation: 256.418 degrees

Field radius: 0.712 degrees


Everything went wrong with this one. I've been trying to capture data on this since June 11, but I ended up trashing over 120 subs due to a slew of errors. Terrible guiding, collimation problems, weather-related issues... it felt like whenever I pointed my scope at this object, the clouds rolled in.

Ultimately, I only ended up with a little over an hour per channel and it came out noisy and very posterized. I'll try again next year. I suggest not viewing this one in full resolution.



Chris Sullivan



Reprocessed from scratch because I should be working and really don't want to...


Last change - pulled back the reds a little.


Increased contrast.

Sky plot

Sky plot


IC 1396: Elephant Trunk Nebula (aka. The Cursed Project), Chris Sullivan