IC 2948. THE RUNNING CHICKEN NEBULA. A DETAIL

IC2948-RCN-Ha-HOOH-11-bC
Click on the image for a larger version The Running Chicken Nebula (IC 2948) is a large HII emission region located in the constellation Centaurus. In this web site, you can find two more versions of this nebula. A wide field 3×3 degrees image taken with the TOA 130, showing the nebula in its entirety and a close-up of the central part of the nebula, taken with the CDK20. This image depicts a beautiful structure located on the Western rim of the Nebula. I have found that it resembles many objects, like the Philadelphian “Liberty Bell” showing even its upper “crack”… This region is a very active star birth area. Shown below is a fragment of this image, that contains two structures that might be related to the star formation. On the lower right of center, an arc that can be taken for a Herbig-Haro object (nevertheless, no HH object has been described in these coordinates…), as well an apparent “proplyd” on the upper left corner:

Additional Information

Object
Name(s): IC 2948. The Running Chicken Nebula
Type: Emission Nebula
RA:  11h 38m 48s
Dec: -63º 31’ 55”
Constellation: Centaurus
Size (arcmin): 75×50
Magnitude: +4.5
Distance: 400 ly
Image
Date: 2018-07-01 thru 2018-07-06
Location: iTelescope.net, SSO near Coonabarabran, NSW Australia
Size (arcmin): 37×37
Telescope: Planewave CDK 20” f/6.8
Camera: SBIG STX16803 (4096x4096pix)
Guiding: Astrodon MonsterMOAG off-axis guider
Total exposure: 12.5 hours (Ha (3nm): 7 hours; OIII (3nm): 4 hours; RGB 1.5 hours -only for the stars)
Processing: CCDStack, Photoshop CC 2018
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