Galaxy · Ursa Major
M81 / Bode's Galaxy
M81
A grand-design spiral galaxy with a warm core and faint outer arms drawn out through a long, multi-night capture campaign.
- Type
- Galaxy
- Catalog
- M81
- Region
- Ursa Major
- Captured
- May 1, 2025
- Image size
- 1200 x 900
- Camera
- ZWO ASI2600MC Pro
- Filters
- NoFilter
- Sub-exposures
- 506 x 300s
- Integration
- 36h 35m
- Software
- PixInsight
- Processing notes
- 506 light frames were captured across nine observing nights; 439 were accepted in the confirmed integration and 67 were rejected.
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Prints and licensing Sky map Read the galaxy portrait notesMore in the field
Related images
Image story
What to look for
Look for the warm yellow core and the faint bluish outer spiral arms; the deep field also carries a scattering of Milky Way stars.
Capture lesson: The low-contrast outer arms required a nine-night, 506-frame campaign and careful processing to separate them from the background.
Context source: Archive capture and integration record + galaxy portrait notesCapture recipe
How this frame was made
ZWO ASI2600MC Pro · Filters: NoFilter · 506 x 300s subs · 36h 35m integration
See the full acquisition factsCosmic passport
M81 / Bode's Galaxy
Apparent scale
Scale comparison is waiting for a recorded field of view.
Calculation note: recorded FOV ÷ 0.5° apparent full-Moon diameter. This describes the captured field, not the physical size or distance of the object.