Iiro's DeepSky Sketches

Name: NGC 40	Other name: PK 120+9.1
RA: 0h 13m	DEC: +72° 31'
Constellation: CEP
Type: Planetary nebula
Magnitude: 10.7
Size: 60'' x 40''
Surface brightness: 7.3
Brightest star: 11.5
Classification: 3b(3)
Description: F,vS,R,vsmbM,L*cont f
Notes: H IV 58,PK120+9.1,Lord Rosse saw spiral structure
Observer: Iiro Sairanen
Location: Härskiänsaari, Ruokolahti, Finland
Date: 3/4.11.2004 20:15
Instrument: Newton 406/1830 mm
Magnification: 487x	Filter: UHC
Field: 6'	Seeing: 3
Background sky: 4	NE lim mag: 6.2
Visuality: I	Height: 76°
Weather: +3°C, windy, 63% Moon is rising in NE
Description: Extensive and bright planetary in Cepheus. Conspicuous central star (11.5 mag) and ring structure is visible even at low powers. The ring around the outer section is broken in N and S edges at 487x. Central hole is covering by bright haze which brightness is changing teasingly.
Updated: 8.11.2004 21:07