The following DSO lists include the angular sizes of the objects:
http://messier.seds.org/data1.html (the Messier Catalog)
http://messier.seds.org/xtra/similar/sac110bn.html (the best objects in the NGC)
http://messier.seds.org/xtra/similar/rasc-ngc.html (the RASC's finest NGC objects list)
http://www.astroleague.org/al/obsclubs/herschel/h400lstn.html (the Herschel 400 list)
Here are some sites with searchable DSO databases.
* angular sizes of some objects
Sic itur ad astra!
Chance favors the prepared mind.
A man is a small thing, and the night is very large and full of wonders.
I've been chipping away at this great hobby for about 2 months now and I learn something new every day. I'm just starting to be aware of my setup's field of view (about 60' x 40') and its relation to the angular size of the objects I'm imaging. For instance, the Orion Nebula fits very nicely in my FOV. The North American Nebula? Not so much.
Does anyone know of a listing of DSOs by their angular size? Online and searchable would be awesome!
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