Basic object information

Name: NGC 2392
Popular name: Eskimo Nebula
Type of object: Planetary nebula
Magnitude: 8.6
Size: 47.0"x43.0"
Magnitude of central star: 10.6
Object classification: 3b(3b)
Description: B,S,R,*9M,*8 nf 100''
Notes: H IV 45;Clown Face or Eskimo Nebula;PK197+17.1;sev shells

Catalog information

Right ascension: 07h 29m 09.4s
Declination: +20 54' 45"

Constellation: Gemini


Observer: Iiro Sairanen
Obs. place: Härskiänsaari, Ruokolahti, Finland
Date/Time: 30/31.1.2006 22:10

Telescope: Newton 457/2280 mm

Magn: 1203x

Filter:

Field: 2'

NE Lim.mag: 6.3

Background sky: 3

Seeing: 2

Height: 48
Visuality: I
Weather: -10C, windy

There has been discussion of Eskimo Nebula in Finnish discussion group so I decided to look at what I can see. I looked at several magnifications between 183x to 1206x and for my surprise the biggest was the best. The main details were visible even at 309x but they were badly in view. I used 3.8 mm Baader eyepiece with 2x-barlow which gives 1206x. The view is awesome! 10.5 mag central is the middle of a ring, which is somewhat elliptical in N-S direction and little wider on the south. The central area is like a miniature of M57. This complex is surrounded by a fainter outer halo. It is almost even brightness but on the south and north there are curved brightenings. Southern is much clearer, larger and brighter. The nebula is clearly blue. The nebula filters UHC and O-III improves marginally structures' visibility so they don't help much.