Elephant's Trunk Nebula in IC1396

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About this Image

Subject	Elephant's Trunk Nebula in north east quadrant of IC1396
Objects	IC1396, vdB142 / LDN1105 / IC1396A / IC1396B / Comet tail number 6, B161
Data	SAO/NASA Astrophysics Data System (ADS) database entry
Description	Narrowband image of cometary globule and dark nebulae within IC1396 emission nebula complex. False colour presentation using hubble palette (Red = Sulphur II, Green = Hydrogen Alpha, Blue = Oxygen III). A wider field view showing the whole IC1396 nebula is shown in this old image. In that view the top left portion of the nebula corresponds to the image on this page.

Date	20090905-20090926
Location	Pumpkin Patch Observatory, Bourn, Cambridge, UK
Environment	~10-15C, 75-85% humidity
Optics	Astro Optik 400mm Cassegrain @ prime focus (f=1200mm)
Filters	Astrodon 6nm narrowband, YR Cyclops filter wheel
Mount	Paramount ME
Guiding	Borg 101ED/SBIG ST402ME
Camera	FLI Microline 16803
Exposure	Total exposure 19.6hrs - R/SII 7.5hrs, G/Ha 3.3hrs, B/OIII 8.83 hrs, 10/20 minute subs
Processing	Maxim/DL 5, CCDStack, Photoshop CS
Notes	F3 now decently collimated, reasonable seeing - 1.5px fwhm for some OIII subs. The image above is a new attempt at reprocessing the image data from the one originally posted on this page.