NGC 40 (PK 120+9.1) Planetary Nebula in Cepheus
Located at: RA 00 hours 13 minutes 01 seconds, Dec +72 degrees 31 minutes 19 seconds
Size: 70" x 60" Magnitude: 10.7 photographic Class: 3b+3
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, 210 minutes (21 x 10 minute subs), 09/28/2012; seeing 3.1-4.1 FWHM per CCDStack
CCDStack 2.66.4490.32361, Photoshop CS5.1
Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s
|Notes:||I imaged NGC 40 and
M 57 (one night each) while waiting for
the moon to clear the area of NGC 7479 ...
See 200% crop.
From the the NGC / IC Project:Contemporary Visual Observation(s) for NGC 40
NGC 0040 = PK 120+9.1 = PN G120.0+09.8 00 13 01.0 +72 31 19 V = 10.6; Size 38"x35" 17.5" (12/30/99): at 100x appeared (unfiltered) as a slightly elongated, moderately bright disc surrounding a bright mag 11.5 central star. A slightly fainter mag 12 star lies 1.0' SW. This is a low excitation PN with an OIII/H- beta ratio of just 0.4 and at 100x there was a noticeable enhancement using the H-beta filter while it dimmed with an OIII. At 220x, a star was intermittently visible at the SW edge and the PN was slightly elongated SSW-NNE. The best filter response with this power was using the UHC. The surface brightness appeared irregular -- darker around the central star and slightly brighter along the west and east side of the rim. At 280x, the faint star I had noted earlier was barely off the SW edge and PN was weakly annular with a brighter rim along the W and E side and a darker center. The SW and NE ends of the halo were clearly weaker, though. 380x provided a nice view with subtle irregularities in the interior. 17.5" (11/1/86): bright, moderately large, round. Contains a prominent mag 11.5 central star surrounded by a fairly bright halo. 13" (12/7/85): at 166x, bright central star visible centered within a fairly small prominent disc. 13" (10/12/85): moderately large, bright central star surrounded by a moderately bright halo at 166x-214x using a UHC filter. 8": the bright central star is surrounded by an easy halo. - by Steve Gottlieb