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Abell 22
Abell 22 is a faint bipolar planetary nebula in the constellation Canis Minor.
It has a very unusual morphology, with a rectangular core and 4 faint outer lobes arranged rectangularly. It has a high dynamic range - the core being much brighter than the lobes. The outer lobes only have Ha emission, whereas there is faint OIII emission in the core. The core has an overall size of 125 arc seconds, with the outer lobes extending to around 4 arc minutes.
Picture
TARGET
Nomenclature
: Abell 22
Right Ascension: 07:36:07.83
Declination:  +02:42:16.75
Size: 4'
EQUIPMENT USED
APM TMB LZOS 152 refractors
10Micron GM2000 HPS mount
IMAGE CAPTURE
Red: 20x300" bin 1x1
Green: 23x300" bin 1x1
Blue: 23x300" bin 1x1
Ha: 73x900" bin 1x1
OIII: 47x900" bin 1x1
Total Integration: 35 hours 30  minutes
Pixel scale: 0.534 arcsec/pixel
Field radius: 0.278 degrees
Capture location:  Fregenal de la Sierra, Spain
IMAGE PROCESSING:
CCDStack2 and Photoshop
Click here for a larger version
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