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M81 imaged over 5 sessions and 1 year.
Telescope:   Stellina
Length:   400mm
Aperture:   80mm
F-stop:   f/5.0
Sessions:   5
Captured:   2021-01-23 to 2022-04-05
Lights:   1032
Exposure:   10
Total exposure:   2 h
Ra:   9h 55m 20.1s
Dec:   +69° 03' 10.193
Size:   52.024 x 35.215 arcmin
Radius:   0.524 deg
Scale:   0.619 arcsec/pixel