Andromeda IX (And 9) is a dwarf spheroidal

satellite A satellite or artificial satellite is an object intentionally placed into orbit in outer space. Except for passive satellites, most satellites have an electricity generation system for equipment on board, such as solar panels or radioisotope ...

of the

Andromeda Galaxy The Andromeda Galaxy (IPA: ), also known as Messier 31, M31, or NGC 224 and originally the Andromeda Nebula, is a barred spiral galaxy with the diameter of about approximately from Earth and the nearest large galaxy to the Milky Way. The gala ...

. It was discovered in 2004 by resolved stellar photometry from the Sloan Digital Sky Survey (SDSS), by Zucker et al. (2004). At the time of its discovery, it was the galaxy with the lowest known surface brightness, Σ_''V'' ≃ 26.8mags arcsec⁻² and the faintest galaxy known from its intrinsic absolute brightness. It was found from data acquired within an SDSS scan along the major axis of M31, on October 5, 2002. Its distance was estimated to be almost exactly the same as that of M31 by McConnacrchie et al. (2005).

References

External links

SEDS webpage for Andromeda IX
{{DEFAULTSORT:Andromeda 09 Dwarf spheroidal galaxies 4689222 Local Group Andromeda Subgroup Andromeda (constellation) Astronomical objects discovered in 2002

See also

References

External links