NGC 40

Step 1

Move mouse over sketch to see the NOAO photo demonstrating how my perception of brightness differs from the actual structure of the nebula.
Click the image for a larger version.
Rollover photo courtesy of Steve and Paul Mandel/Adam Block/NOAO/AURA/NSF.

Observation Notes:

At low power, the hazy appearance of this planetary nebula was not difficult to see. At 240X, it appeared circular and fairly even in brightness. The central star was prominent, and another field star hovered about 1.2 arc minutes to the southwest, with the nebula extending about halfway to this star. So I’d estimate a diameter of about 1 arc minute for the nebula itself. With scrutiny, I thought that the south to southeast quadrant appeared subtly brighter. Checking astrophotography afterward showed this to be a questionable observation. The rollover on the sketch shows a photo overlay from the NOAO demonstrating the difference in structure. Perhaps another look from a darker sky sometime would help with that.

Object Information:

NGC 40 was discovered by F.W. Herschel in 1788. NGC 7062 is also catalogued as PK120+9.1, H IV-58, h 8, GC 20.

Subject NGC 40
Classification Planetary Nebula (3b(3))
Position Cepheus [RA: 00:13:00.9 / Dec: +72:31:20]*
Size* 38″ x 35″
Brightness* 12.3 vMag / 10.7 bMag
Date/Time September 14, 2007 – 01:00 AM MST (September 14, 2007 – 08:00 UT)
Observing Loc. Flagstaff, AZ – Home
Instrument Orion SVP 6LT Reflector (150 mm dia./1200 mm F/L)
Eyepieces/Mag. 10 mm Sirius Plössl + 2X Barlow (240X)
Conditions Clear, calm
Seeing 5/10 Pickering
Transparency ~ Mag 5.8 NELM
*References NGC/IC Project