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

Telescope:

 14.5" f5 Newtonian reflector

Camera:

  ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter, 600 minutes  (60 x 10 minute subs) 03/23/24 & 04/2/3/2013; seeing 2.6-3.8 FWHM per CCDStack

Processing:

CCDStack 2.67.4842.27736, Photoshop CS5.1

Location:

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

Notes: Finally gave up on getting more data, as the difference between the first two nights and subsequent nights has made little difference in the final image ... the constant on-shore flow has not produced rain, but has kept high clouds and/or fog in almost every evening I've tried to image. The only cloud free nights were the two first nights that had a lot of moon in the sky. See the 8" 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 
suspected.

- by Steve Gottlieb