Andromeda I

Dwarf Spheroidal Galaxy Andromeda I (PGC 2666), type dE3 pec ?, in Andromeda

[And I image by M. Germano]

00 : 45.7
+38 : 00
dE3 pec ?
3000 kly
Apparent Dimension:
2.5 x 2.5 arc min
Abs. Mag:
Andromeda 1, or And I, is a dwarf spheroidal galaxy, and a companion of the Andromeda Galaxy M31, situated roughly 3.5 degrees south and slightly east of the great neighbor, corresponding to a projected distance of about 150,000 ly. From us, it is slightly more distant than the great galaxy, according to van den Bergh 2000.

And I was discovered by Sidney van der Bergh on photographic plates taken in 1970 and 1971 with the Palomar 48-inch (1.2-meter) Schmidt telescope, together with And II, And III, and the presumable non- or background galaxy And IV (van den Bergh 1972).

Our image was obtained by Martin Germano. It is a 125-min exposure on hypered Kodak Tech Pan 2415, taken through his 14.5-inch f/5 Newtonian telescope in September 2001. Martin writes: "This dwarf elliptical Galaxy in Andromeda is really faint! Just a small scattering of faint dots near the center of this image."


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Hartmut Frommert
Christine Kronberg

Last Modification: July 25, 2001