Basic object information

Object name: NGC 7293
Popular name: Helix Nebula
Object type: Planetary nebula
Magnitude: 7.3
Size: 17.6'
Magnitude of central star: 13.5
Object classification: 4(3)
Description: !,pF,vL,E or biN
Notes: Helical Nebula;low surf brightness

Catalog information

RA (J2000.0): 22h 29m 36.0s
Dec (J2000.0): -20 50' 00"

Constellation: Aquarius


Observer: Iiro Sairanen
Obs. place: Säijä, Lempäälä, Finland
Date/Time: 10/11.10.2007 23:15

Telescope: Newton 300/1500 mm

Magn: 88x

Filter: O-III

Field: 18'

NE Lim.mag: 6.4

Background sky: 3

Seeing: 3

Visuality: II

Height: 8


Weather: -1C

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.