Exposure data
Telescope: 4.5" Newton f=440mm
Camera: SBIG ST8300M
Filters: Baader HαOlllSll
Exposure times: Hα:12x15min Olll:6x15min Sll:6x15min
Exposure time total: 6h
Mount: 10Micron GM 1000 HPS
Location: Erdweg/Germany (500m)
Date: 2012-03-27+28
Object data of NGC 2237
Object type: Open cluster (ll 3 r n) with emission nebula
Size: 80' x 60'
Magnitude: 6.0 mag
Constellation: Monoceros
Distance: 5000 Ly
