Owl nebula

(redirected from NGC 3587)

Owl nebula

(M97; NGC 3587) A relatively large, distinctively shaped planetary nebula in the constellation Ursa Major, about 500 parsecs away.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

Owl Nebula

[′au̇l ′neb·yə·lə]
(astronomy)
A large planetary nebula in Ursa Major which has two large, circular darker areas in an otherwise opaque spherical shell.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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M97, also catalogued as NGC 3587, lies in Ursa Major at RA 11h 14.8m and Dec +55[degrees] 1" (2000.0) which puts it approximately 2.3[degrees] east and 1.4[degrees] south of mag 2.4 Merak ([beta] UMa).
Within a wide field of view the planetary nebula NGC 3587 (M97) is situated only 48' SE from Messier 108.
For example, though it glows at a total magnitude of 9.9, the Owl Nebula (M97, NGC 3587) has a core (bright disk) 194" in diameter.