Exposure data
Telescope: 4.5″ Newton f=440mm
Camera: SBIG ST2000XM
Filters: SBIG LRGB + Astronomik Hα (13nm)
Exposure times: Hα: 18x10min L: 8x10min R: 2x10min G: 2x10min B: 2x10min
Exposure time total: 5h
Mount: Vixen New Atlux
Location: Erdweg/Germany (500m)
Date: 2011-09-23+24
Object data of NGC 7635
Object type: Emission nebula
Size: 15′
Magnitude: 11.0 mag
Constellation: Cassiopeia
Distance: 7100 Ly
Object data of M 52
Object type: Open star cluster (ll 2 r)
Size: 13′
Magnitude: 6.9 mag
Constellation: Cassiopeia
Distance: 4600 Ly
