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Andromeda I June 3, 2012

Posted by brunomarshall in Dwarf Spheroidal Galaxy.
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Andromeda I or Andromeda 1 is a dwarf spheroidal galaxy(dSph), is a companion of the great Andromeda Galaxy M31. It´s very dificult to see, even with a good telescope will appear only a small dot. [1][2]

Andromeda I it´s about 2.40  million light-years away in the constellation Andromeda. [1][2][3]

Andromeda I is part of the Local group of galaxies and a satellite galaxy of the Andromeda Galaxy (M31). It is roughly 3.5 degrees south and slightly east of M31, at an estimated projected distance of ~40 kpc or ~150,000 light-years. [1][2][3]

The estimated age of Andromeda I is approximately 10 Gyr. [3][4][5]




[3]-Sidney van den Bergh, 1972. Search for Faint Companions to M31. Astrophysical Journal, vol. 171, pp. L31-L33 [ADS: 1972ApJ…171L..31V]

[4]-Sidney van den Bergh, 2000. Updated Information on the Local Group. Publications of the Astronomical Society of the Pacific, Vol. 112, No. 770, pp. 529-536 [ADS: 2000PASP..112..529V]