NGC 7662 (PK 106-17.1) Planetary Nebula in Andromeda

Located at: RA 23 hours 25 minutes 54 seconds, Dec +42 degrees 32 minutes 06 seconds

Size: 37" Magnitude: 9.2 photographic Class: 4+3

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, 180 minutes (60 x 3 minute {180 seconds} subs), 09/18/2013; 2.6-3.6 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:* I imaged a couple of planetary nebulae (see NGC 6818) while waiting the Moon to clear the area of NGC 6822. As with other planetary nebulae, NGC 7662 has a larger (and much fainter) outer shell. It was not recorded in this red-filtered 180 minute exposure. See this blue-filtered CDS Aladin Previewer POSS2/J/DSS2 image.

View 200% crop.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 7662
NGC 7662 = PK 106-17.1 = PN G106.5-17.6 = Blue Snowball
23 25 53.9 +42 32 05
V = 8.3;  Size 32"x28"

17.5" (10/13/01): at 500x, this blue high surface brightness planetary has a 
beautiful double-shell structure with a small, dark center.  The bright inner 
structure has a delicate, embedded thinner ring of very high surface brightness 
which is weaker at the following end.  In the center of this ring is a small, 
darker hole.  The fainter, outer envelope is elongated SW-NE, ~35"x25", giving 
an asymmetric appearance with the outline of the inner ring.

17.5" (10/12/85): extremely bright, very high surface brightness, fairly small, 
easily takes very high power.  At 410x, the planetary appears weakly annular 
with a slightly darker center.  There is a second outer shell which exhibits 
subtle structure due to an irregular surface structure, blue-green color is 
evident.  Central star not seen.

13" (9/11/82): darker center, faint outer shell.

8" (9/25/81) : slightly darker center at 300-400x, irregular surface brightness.

- by Steve Gottlieb