Few objects in the sky have no official numerical designation. This very faint object is one of them. It was studied in a 2010 paper on IR cirrus clouds.
This object is referred to in SIMBAD as the “Spider Cirrus”. It is also known as the Angel Nebula, although there is another much more famous Angel Nebula (
NGC 2170).
This cloud is located 1200 light years away in the constellation of Draco at a declination of +74 degrees. The brightest, most intense part of this nebula is about 1.3 degrees wide, which corresponds to a width of 30 light years.
This is an extremely dim object and the result is very noisy. 1.7 hours is not enough and I need to revisit this object sometime.
Numerous small galaxies are seen in the background. The galaxy at the right side of the image, NGC 3147, is one that I have imaged at a smaller image scale with my C11 (
here). The galaxy at upper right, NGC 3183, is seen in more detail than I would have thought possible from a RASA setup.
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