Iiro's DeepSky Sketches

Name: Messier 46Other name: NGC 2437
RA: 7h 41.8m DEC: -14° 49'
Constellation: PUP
Type: Open cluster
Magnitude: 6.1
Size: 27.0'
Surface brightness: 13
Number of stars: 100
Brightest star: 8.7
Classification: III 2 m
Description: !,Cl,vB,vRi,vL
Notes: PLNNB NGC 2438 on N edge,150 * 10-13 mag
Observer: Iiro Sairanen
Location: Base del Teide (2280m), Tenerife, Spain
Date: 19/20.4.2004 22:15
Instrument: Newton 110/805 mm
Magnification: 107xFilter: -
Field: 28'Seeing: 2
Background sky: 2NE lim mag: 7
Visuality: IIHeight: 34°
Weather: +11°C, thin highclouds
Description: Rich open cluster which includes a planetary nebula NGC 2438. The nebula was seen as an 11 mag roundish glow. Nice cluster to look but difficult to sketch. About 70 stars between 8-13 magnitudes.
Updated: 15.5.2004 13:56