| Name: | Andromeda Galaxy |
|---|---|
| Designation: | M31 |
| Magnitude: | 3.4 |
| Constellation: | Andromeda |
| Object Type: | Spiral Galaxy |
| Best Viewing: | Fall/Winter |
| Distance: | 2.5 million LY |
| Surface Brightness: | ~22.0 mag/arcmin² |
| Viewing Difficulty: | Very Easy |
| Viewable By: | Naked Eye / Binoculars |
| Zoom Image: | To Zoom |
| ESA Page: | To Page |
| ... Personal Entries: | |
| Observation Date: | |
| Location: | |
| Notes: | |
| ← Galaxies | |
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Credit:NASA, ESA, Digitized Sky Survey 2 (Acknowledgement: D. De Martin)
Brightness notes: Integrated magnitude alone is misleading for galaxies. What really matters visually is surface brightness and angular size. So to make it more meaningful, I’ve added a “Surface Brightness value in the table. Surface brightness explains why M74 is hard and M82 pops.
