Iiro's DeepSky Sketches

Name: NGC 2392	Other name: PK 197+17.1
RA: 7h 29.2m	DEC: +20° 55'
Constellation: GEM
Type: Planetary nebula
Magnitude: 8.6
Size: 47'' x 43''
Surface brightness: 6.8
Brightest star: 10.6
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
Observer: Iiro Sairanen
Location: Härskiänsaari, Ruokolahti, Finland
Date: 30/31.1.2006 22:10
Instrument: Newton 457/2280 mm
Magnification: 1206x	Filter: -
Field: 2'	Seeing: 2
Background sky: 3	NE lim mag: 6.3
Visuality: I	Height: 48°
Weather: -10°C, windy
Description: 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.
Updated: 20.2.2006 19:20
Name: NGC 2392	Other name: PK 197+17.1
RA: 7h 29.2m	DEC: +20° 55'
Constellation: GEM
Type: Planetary nebula
Magnitude: 8.6
Size: 47'' x 43''
Surface brightness: 6.8
Brightest star: 10.6
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
Observer: Iiro Sairanen
Location: Lakasenpelto, Imatra, Finland
Date: 4/5.2.2003 21:02
Instrument: Newton 406/1830 mm
Magnification: 292x	Filter: Lumicon deepsky
Field: 11'	Seeing: 4
Background sky: 4	NE lim mag: 5.5
Visuality: I	Height: 43°
Weather: -15°C
Description: Bright blue disk. 10.6 mag central star was easy. Center parts brighter than outer.
Updated: 11.2.2003 17:18
Name: NGC 2392	Other name: PK 197+17.1
RA: 7h 29.2m	DEC: +20° 55'
Constellation: GEM
Type: Planetary nebula
Magnitude: 8.6
Size: 47'' x 43''
Surface brightness: 6.8
Brightest star: 10.6
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
Observer: Iiro Sairanen
Location: Lakasenpelto, Imatra, Finland
Date: 1/2.2.2000 21:35
Instrument: Newton 110/805 mm
Magnification: 162x	Filter: -
Field: 15'	Seeing: 2
Background sky: 4	NE lim mag: 5
Visuality: -	Height: 0°
Weather: -5°C
Description: Kohde näkyi vaaleansinisenä levynä, jonka keskusta oli ulko-osia kirkkaampi, mikä paljasti keskustäden, joka ei suoraan näkynyt.
Updated: 18.2.2003 8:57