PK 184+0.1 (Kohoutek 3-70) Planetary Nebula in Taurus

Located at: RA 05 hours 58 minutes 46 seconds, Dec +25 degrees 18 minutes 42 seconds

Size: 2.0" Magnitude: 17.3 photographic Class: --

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, 54.5 minutes (106 x 0.05 / 35 x 0.10 / 109 x 0.500 minute {3 / 6 / 30 seconds} subs), 02/6/2016; seeing 3.3-6.0 per CCDStack

Processing:

CCDStack 2.90.5589.16047, Photoshop CS5.1

Location:

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

Notes:

See O'Neal 9. Used 'best' 250 out of 269 subs (tossed seeing over 5.6 seconds, and stars smeared from wind gusts). I didn't realize how faint the planetary was (17.3 photographic) when I stared ... I couldn't see the planetary on individual subs at 3 seconds. I increased to 6 seconds and still couldn't see the planetary. Finally settled on 30 second subs ... This is the smallest planetary I have imaged that is (barely) recognizable from a star (see crop).

View 200% crop.

See the CDS image/data.