NGC 6891 (PK 54-12.1) Planetary Nebula in Delphinus

Located at: RA 20 hours 15 minutes 09 seconds, Dec +12 degrees 42 minutes 12 seconds

Size: 21" Magnitude: 11.7 photographic Class: 2a+2b

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,  133.33 minutes (80 x 1.67 minute {100 seconds} subs), 11/17/2013; seeing 2.6-4.5 FWHM per CCDStack

Processing:

CCDStack 2.75.4973.15338, Photoshop CS5.1

Location:

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

Notes: View 200% crop.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 6891

NGC 6891 = PK 54-12.1 = BD+12?4266 = PN G054.1-12.1
20 15 08.8 +12 42 15
V = 10.4;  Size 12"x10"

17.5": very bright at 140x and OIII filter.  Appears as a small high surface 
brightness bluish oval of 10"-15" diameter.  At 410x, a brighter center or mag 
13 central star is visible.  At this magnification, appears as a bright oval 
with a fainter outer halo.

8": fairly high surface brightness, small blue disk.

- by Steve Gottlieb