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It’s been 10 years since Mt. Wilson ex-superintendent Dave Jurasevich first imaged the Soap Bubble Nebula in Cygnus for which he ultimately received discovery designation “Ju1” (Jurasevich 1) in 2013 by CDS (see first link below). But that is not why I just imaged the obscure planetary nebula. During our recent May CAV astrosafari, APOD-Man Barry Riu mentioned that he was about to turn his awesome Dreamscope loose on the Soap Bubble, also called G75.5+1.7, just as California astroimager Mel Helm did (with his own Dreamscope) days after Dave’s discovery. Seeing the summer Milky Way blazing in the east this last Chiefland visit, I figured it was time to visit such luminaries as Le Gentil 3, Sadr, Crescent Nebula, Frilly Nudibranch Nebula and the elusive Ju1 which will be even more elusive after Barry gets done violating it!!! I used a number of imaging systems; image details below. Even attached a gif animation – Ha vs. LRGB! Serious fun juggling these different focal lengths, f-ratios and cameras. Sure a great way to learn the sky – DSLR/fisheye —-> RCOS! …
IMAGE LEGEND:
Gamma Cygnus Movie = LRGB and Ha images as animation produced in Photoshop
Cygnus Scene = Vixen f/3.8 refractor; 1 hour exposure LRGB with NB Soap Bubble superimposed; SBIG 11K camera
Cygnus Scene in Ha = Vixen refractor; 1 hour Ha exposure with most stars removed & HDR toning and high pass filtering
Soap Bubble Narrowband = Ha and OIII 30-minute subs 3×3 on RCOS telescope & Apogee camera; 4.5 hours total exposure
Crescent Narrowband = RCOS – Apogee camera; combo of NB data (8.5 hrs) and LRGB data (2 hrs)
Summer Triangle = Summer Milky Way from IC1396 to Altair; Canon 60Da, ISO 3200; Canon 17mm f/3.5 lens; ten 90-second exposures stacked with DeepSkyStacker software; tracked on Vixen GPD2 mount
Milky Way Over Observatory = 9 minute exposure (6 X 90sec.) of Summer Milky Way – Canon DSLR tracked on Vixen GPD2 – Rokinon 8mm fisheye at f/3.5 kept dry by chemical handwarmers; doesn’t it look we are crashing into Coma edge-on galaxy NGC 4565??!!!
Milky Way Over Observatory = 9 minute exposure (6 X 90sec.) of Summer Milky Way – Canon DSLR tracked on Vixen GPD2 – Rokinon 8mm fisheye at f/3.5 kept dry by chemical handwarmers; doesn’t it look we are crashing into Coma edge-on galaxy NGC 4565??!!!
LINKS:
http://www.starimager.com/Image%20Gallery%20Pages/Hydrogen%20Alpha%20Images/ic%201318_AP_8%20pane%20mosaic_bubble%20nebula.htm – Great write-up on Ju1!!
http://www.williamsseaandsky.com/?page_id=5633 – RCOS Ha image of frilly nudibranch (sea creature) nebula seen in attached Vixen Ha image
https://en.wikipedia.org/wiki/Guillaume_Le_Gentil — discoverer of Le Gentil 3 in Cygnus – tough life chasing astronomy!