It is roughly 3.5 degrees south and slightly east of M31.

[6] As of 2005, it is the closest known dSph companion to M31[7] at an estimated projected distance of ~40[4] kpc or ~150,000[6] light-years.

Andromeda I was discovered by Sidney van den Bergh[8] in 1970 with the Mount Palomar Observatory 48-inch telescope.

[5] Further study of Andromeda I was done by the WFPC2 camera of the Hubble Space Telescope.

This found that the horizontal branch stars, like other dwarf spheroidal galaxies were predominantly red.