M 97 (NGC 3587, PK 148+57.1) Planetary Nebula in Ursa Major

Located at: RA 11 hours 14 minutes 48 seconds, Dec +55 degrees 01 minutes 09 seconds

Size: 3.4' Magnitude: 12.0 photographic Class: 3a

North is up

West to the right


 8" f5 Newtonian reflector


  ST-8XME, self-guided, binned 1x1, temp -25c, camera control MaxIm DL 4.56


Lumicon Red filter, 660 minutes  (66 x 10 minute subs) 02/12/14 & 3/4/2010; seeing 2.7-4.6 FWHM per CCDStack


CCDStack 1.6.1, Photoshop 7.0


 Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)

Notes: Wanted to re-shoot this image for more exposure time and a little better focus/centering ... see previous image here ... however, February weather has prevented gathering more dated than the old exposure. Processed and uploaded what I have for now. Added one more night of data in early March, with much worse seeing, but doubled the total exposure time for this final image. See the 14.5" version.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 3587
NGC 3587 = PK 148+57.1 = M97 = Owl Nebula = PN G148.4+57.0
11 14 47.7 +55 01 08
V = 9.8;  Size 202"x196"

17.5": fairly bright, very large, round.  Two low contrast darker "holes" are 
visible with averted vision which form the "eyes" of the "Owl Nebula".  The SE 
hole is darker but the NW hole appears larger.  Central star not visible.

13": moderately bright, large, round.  A single hole west of center is highly 

- by Steve Gottlieb