- Filters
- L3 h 30 minR2 hG1 h 30 minB1 h 40 min
- Category
- Galaxy
How it was taken
Capture
- Date
- Exposure
- 8 h 40 min
- Frames
- 53
- Field center
- 2ʰ 22ᵐ 35ˢ +42° 22′
- Field of view
- 59′ × 43′
- Scale
- 0.78″ per pixel
- Rotation
- 18° from north
- Focal length
- 1000 mm, f/5
- Views
- 433
Equipment
- Telescope
- Sky-Watcher BK2001P
- Camera
- ASI ZWO 1600MM Pro
- Mount
- Sky-Watcher HEQ5 Pro
- 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 NGC 891Each photo is a separate processing
Since 2015, the exposure has grown from 22 min to 8 h 40 min
