Boötes I (dwarf galaxy)
The Boötes Dwarf Galaxy (Boo I dSph) is a galaxy, which appears faint, with a luminosity of 100,000 L☉ and an absolute magnitude of –5.8. It lies about 197 thousand light-years (60.4 kiloparsecs) away in the constellation Boötes. This dwarf spheroidal galaxy appears to be tidally disrupted by the Milky Way Galaxy, which it orbits, and has two stellar tails that cross over to form a cross. Tidally disrupted galaxies usually only form one tail.
Like many of the ultrafaint dwarf spheroidals, the entire galaxy appears fainter than the star Rigel (absolute magnitude –6.8).
- The Universe within 500,000 light-years The Satellite Galaxies (Atlas of the Universe)
- Two New Galaxies Orbiting the Milky Way (Ken Croswell) April 19, 2006
- Strange satellite galaxies revealed around Milky Way Kimm Groshong (New Scientist) 17:00 24 April 2006
- New Milky Way companions found: SDSS-II first to view two dim dwarf galaxies (SDSS) May 8, 2006
- Astronomers Find Two New Milky Way Companions (SpaceDaily) May 10, 2006
- Boötes Dwarf Galaxy at Constellation Guide