PK 126+3.1 (Kohoutek 3-90) Planetary Nebula in Cassiopeia

Located at: RA 01 hours 24 minutes 59 seconds, Dec +65 degrees 38 minutes 33 seconds

Size: 9.0" Magnitude: 16.0 photographic Class: --

North is up

West to the right


 14.5" f5 Newtonian reflector


  ST-8XME, self-guided, binned 1x1, temp -15c, camera control MaxIm DL 4.56


Lumicon Red filter, 390 minutes (39 x 10 minute subs), 10/05/06/2017; seeing 2.3-4.8 FWHM per CCDStack

Processing: CCDStack 2.94.6355.18107, Photoshop CS5.1

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

Notes: Beginning of October ... mostly clear weather, fairly poor seeing (with the advent of off-shore winds), and the brightening moon led me to imaging some open clusters (see NGC 189NGC 433 and Riddle 4) in the north. This is the only planetary imaged, as I thought it would be bright enough to compete with the moon ...

View 200% crop.

See the CDS image/data.