- Filters
- L1 h 35 minR1 h 30 minG1 h 30 minB1 h 20 minHα4 h 5 min
- Category
- Galaxy
How it was taken
Capture
- Date
- Exposure
- 10 h
- Frames
- 102
- Field center
- 9ʰ 55ᵐ 36ˢ +69° 03′
- Field of view
- 44′ × 58′
- Scale
- 0.78″ per pixel
- Rotation
- 106° from north
- Focal length
- 1000 mm, f/5
- Views
- 371
Equipment
- Telescope
- Sky-Watcher BK2001P
- Camera
- ASI ZWO 1600MM Pro
- Mount
- Sky-Watcher EQ6
- Filter
- ZWO L, R, G, B, Ha, OIII, SII (1.25")
- Filter wheel
- ZWO EFW 8x31mm
- Focuser
- ZWO EAF
- Guide scope
- Sky-Watcher 9x50 Finder
- Guide camera
- ASI 120mm
Shooting history of M 81Each photo is a separate processing
Since 2017, the exposure has grown from 15 min to 11 h 20 min
