Iiro's DeepSky Sketches

Name: NGC 2309Other name: OCL 557
RA: 6h 56.1m DEC: -7° 10'
Constellation: MON
Type: Open cluster
Magnitude: 10.5
Size: 3.0'
Number of stars: 40
Brightest star: 13
Classification: II 2 m
Description: Cl,pL,pRi,mC,st13
Notes: H VI 18
Observer: Iiro Sairanen
Location: Los Cancajos, La Palma, Spain
Date: 31/1.4.2008 22:10
Instrument: Newton 110/805 mm
Magnification: 115xFilter: -
Field: 43'Seeing: 3
Background sky: 4NE lim mag: 6
Visuality: IHeight: 48°
Weather: +17°C, scattered clouds
Description: This sketch has been made from our hotel's backyard just for fun. Limiting magnitude and seeing were pretty bad but temperature was nice. There are about 30 stars visible in this cluster.
Updated: 1.9.2008 19:07