Andromeda VIII

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Andromeda VIII
Observation data (J2000 epoch)
Constellation Andromeda
Right ascension 00h 42m 06.0s
Declination +40° 37′ 00"
Distance (comoving) 830,000 kpc
Distance 2.7 million ly
Apparent magnitude (V) 9.1
Absolute magnitude (V) -15.6
Type dSph
Apparent size (V) 45x10 arcmin
Notable features satellite galaxy of the Andromeda Galaxy
Other designations
And VIII, PGC 5056928
See also: Galaxy, List of galaxies

Andromeda VIII (And VIII / 8) is a galaxy discovered in August 2003. It is a companion galaxy to the Andromeda Galaxy, M31, and evaded detection for so long due to its diffuse nature. The galaxy was finally discovered by measuring the redshifts of stars in front of Andromeda, which proved to have different velocities than M31 and hence were part of a different galaxy.

As of at least 2006, the actuality of And VIII as a galaxy has not yet been firmly established (Merrett et al. 2006).[1]

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  1. ^ Merrett, H. R.; Merrifield, M. R.; Douglas, N. G.; Kuijken, K.; Romanowsky, A. J.; Napolitano, N. R.; Arnaboldi, M.; Capaccioli, M.; et al. (June 2006), "A deep kinematic survey of planetary nebulae in the Andromeda galaxy using the Planetary Nebula Spectrograph", Monthly Notices of the Royal Astronomical Society, 369 (1): 120–142, Bibcode:2006MNRAS.369..120M, arXiv:astro-ph/0603125Freely accessible, doi:10.1111/j.1365-2966.2006.10268.x 

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