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Type: planetary nebula
Mag: B=12.5, V=?
This small planetary nebula is situated on the Western edge of the open cluster NGC 2818. Burnham notes that it has a barbell shape.
The RNGC (Sulentic and Tifft 1973) notes that this is a 10.0 mag planetary nebula.
Harrington writes: "On the westnorthwest edge of the cluster [NGC 2818], casting a gray image, lies the dim planetary nebula NGC 2818A. The nebula measures 38 arc seconds across and appears as a hazy, 13th magnitude disk through my 13.1-inch f/4.5 Newtonian on Long Island."
Sanford says "it is about 40 arcseconds in diameter, faint and located at the western edge of the cluster."
Ostuno notes that the planetary appears on photographs as a smaller version of M27, "but in the eyepiece [of a 13-inch reflector at 214x], all I noted was a circular blob of nebulosity."
Houston notes that a 10-inch is probably required to see this nebula, and adds that he has failed with a 12-inch.
PLANTARY NEBULA AND CLUSTER
RA: 09h16m54s - DEC: -36o37'0" - Magnitude: 8.2 - Size: 9'
Tel: 16" S/C – 184x – 290x - Date: 25 November 2009 – Seeing 5.
NGC 2818 is a lovely stringy cluster, and appear to be in a slight oval shape from north-west to south-east. Around 35 members of between magnitude 12 and 13 made a standing impression against a sparse star field. A few brighter stars concentrate in the northern part of the star field. The beauty of this object however, is the proven planetary nebula situated near the eastern edge of the cluster. Planetary nebula PN G261.9+08.5. appears as a small round haze easily seen imbedded between the cluster stars. With real high power a divided pair of lobs can be glimpse from east to west, sport a typical dumbbell shape. The initial references indicate the planetary as NGC 2818 and the cluster as NGC 2818A, SIMBAD does agree; but in the NGC-IC catalogue they're are both listed as NGC 2818 without commentary.
Sky Conditions:The fainter parts of the Milky Way are barely visible.Haziness only visible on the horizon.Atmosphere stable with little interference.
At a magnification of 214*this planetary nebula's minute fuzzy oval shape is seen as a reddish disk among the field stars of the open cluster NGC 2818 and that this nebula is well defined.This planetary nebula measures 1.9'*0.6'.The nucleus of this planetary nebula is only slightly brighter than the far outskirts of this nebula.
The Messier objects
The Bennett objects
The Caldwell list
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