Exposure data
Telescope: 10″ Lacerta Newton f=1000mm
Camera: SBIG ST8300M
Filters: Baader HαLRGB
Exposure times: Hα: 9x8min L: 48x6min R: 16x4min G: 16x4min B: 16x4min
Exposure time total: 9h 12min
Mount: 10 Micron GM 1000 HPS
Location: Erdweg/Germany (500m)
Date: 2018-04-06+07+08
Object data of M 81
Object type: Galaxy (Sb)
Size: 26.9′ x 14.1′
Magnitude: 7.0 mag
Constellation: Ursa Major
Distance: 12 Mio Ly
