Iiro's DeepSky Sketches

Name: NGC 1501	Other name: PK 144+6.1
RA: 4h 7m	DEC: +60° 55'
Constellation: CAM
Type: Planetary nebula
Magnitude: 12
Size: 56'' x 48''
Surface brightness: 11.6
Brightest star: 14.4
Classification: 3
Description: pB,pS,vlE,1'Diam
Notes: H IV 53,PK144+6.1
Observer: Iiro Sairanen
Location: Härskiänsaari, Ruokolahti, Finland
Date: 13/14.10.2004 0:05
Instrument: Newton 406/1830 mm
Magnification: 292x	Filter: UHC
Field: 10'	Seeing: 3
Background sky: 2	NE lim mag: 6.5
Visuality: II	Height: 63°
Weather: +2°C, windy
Description: Very bright blue disk at lower powers but at 292x it is a ring. The ring is very strait but sharp. There is a brightening on the ring's NW edge. Elongated in W-E direction. Slight foil covers the center. The 14 mag central star doesn't cause any problem.
Updated: 22.10.2004 14:49