PK 84+9.1 (Kohoutek 3-73) Planetary Nebula in Cygnus

Located at: RA 20 hours 04 minutes 00 seconds, Dec +49 degrees 19 minutes 04 seconds

Size: 16" Magnitude: 15.2 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, 700 minutes (70 x 10 minute subs), 07/2/3/4/5/2017; seeing 2.2-3.8 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)


Keeping away from the brightening moon in the south ...

I have found some 'confusion' in the identification of this object. The object above is listed in my charting software (Megastar v5.0.14) as "PNG 84.0+9.5, Kohoutek 3-73".

When I search for "PK 84+9.1" in Megastar, I get a planetary nebula located at 20h 08m 43s, +42d 30m 05s (Kohoutek 3-74, PNG 78.6+5.2).

Of the resources I checked, the CDS Aladin preview (see below), and "Planetary Nebula", by Steven J Hynes, seem to have the correct identifications with the object I imaged at 20h 04m, +49d 19m.

Also equating PK 84+9.1 with PK 78+5.1 is the on-line Deep Sky Browser... See the CDS image of PK 78+5.1.

View 200% crop.

See the CDS image/data.