Iiro's DeepSky Sketches

Name: Messier 37Other name: NGC 2099
RA: 5h 52.3m DEC: +32° 33'
Constellation: AUR
Type: Open cluster
Magnitude: 5.6
Size: 24.0'
Surface brightness: 11
Number of stars: 150
Brightest star: 9.2
Classification: II 1 r
Description: !!Cl,Ri,pCM,st L & S
Notes: Total population 500*,dark area near center
Observer: Iiro Sairanen
Location: Sienimäki, Imatra, Finland
Date: 26/27.2.2013 20:20
Instrument: Newton 300/1500 mm
Magnification: 88xFilter: -
Field: 46'Seeing: 3
Background sky: 5NE lim mag: 5.2
Visuality: IHeight: 65°
Weather: +0°C, full Moon, thin clouds
Description: Because of arriving clouds this sketch has been made quite quickly. There is a clearly brighter star in the middle that is surrounded by several fainter. Stars form chains and circular structures where's empty areas between.
Updated: 26.2.2013 22:00