Iiro's DeepSky Sketches

Name: NGC 7293	Other name: PK 36-57.1
RA: 22h 29.6m	DEC: -20° 50'
Constellation: AQR
Type: Planetary nebula
Magnitude: 6.3
Size: 960'' x 720''
Surface brightness: 13.6
Brightest star: 13.5
Classification: 4(3)
Description: !,pF,vL,E or biN
Notes: Helical Nebula,low surf brightness
Observer: Iiro Sairanen
Location: Säijä, Lempäälä, Finland
Date: 10/11.10.2007 23:15
Instrument: Newton 300/1500 mm
Magnification: 88x	Filter: O-III
Field: 34'	Seeing: 3
Background sky: 3	NE lim mag: 6.4
Visuality: II	Height: 8°
Weather: -1°C
Description: Helix Nebula. Very low surface brightness without nebula filters. At 47x it's hardly in view with averted vision and much harder with higher powers. Anyway, the O-III makes everything easier: the nebula is huge and very bright ring which is brighter on the west and northeast edges. The NE brightening is a bit triangular whereas other is more arc like. There are also some stars involved with the central area which is clearly brighter than background sky but fainter than ring around.
Updated: 14.11.2007 21:16