List of Andromeda's satellite galaxies
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Great Andromeda Nebula with M110 at upper left and M32 to the right of the core
The Andromeda Galaxy (M31) has satellite galaxies just like the Milky Way Galaxy. Orbiting M31 are at least 14 dwarf galaxies: the brightest and largest is M32. The second brightest and closest one to M32 is M110. The other galaxies are fainter.
Andromeda's faint companion galaxies lie on or close to a single plane running through Andromeda's center. The unexpected plane of satellite galaxies points toward a nearby group of galaxies (M81 group), possibly tracing the large-scale distribution of dark matter.
Table of known satellites
| Name | Type | Distance from Milky Way (million ly) |
|---|---|---|
| M32 | dE2 | 2.48 |
| M110 | dE6 | 2.69 |
| NGC 185 | dE5 | 2.01 |
| NGC 147 | dE5 | 2.2 |
| Andromeda I | dSph | 2.43 |
| Andromeda II | dSph | 2.13 |
| Andromeda III | dSph | 2.44 |
| Andromeda IV * | dIm? | |
| Andromeda V | dSph | 2.52 |
| Pegasus Dwarf (Andromeda VI) |
dSph | 2.55 |
| Cassiopeia Dwarf (Andromeda VII) |
dSph | 2.49 |
| Andromeda VIII | dSph | 2.7 |
| Andromeda IX | dSph | 2.5 |
| Andromeda X | dSph | 2.9 |
| Andromeda XI | ||
| Andromeda XII | ||
| Andromeda XIII | ||
| Tidal Stream Northwest (Tidal Stream E and F) | ||
| Tidal Stream Southwest | ||
| Triangulum Galaxy (M33) |
SA(s)cd | 2.59 |
* It is uncertain whether is a companion galaxy of the Andromeda Galaxy.
