Andromeda VIII

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.

Not to be confused with 8 Andromedae.
Andromeda VIII
Observation data (J2000 epoch)
ConstellationAndromeda
Right ascension 00h 42m 06.0s[1]
Declination+40° 37′ 00″[1]
Distance (comoving)0.83 Mpc
Distance2.7 Mly
Absolute magnitude (V)-15.6
Characteristics
TypedSph
Apparent size (V)45 × 10 arcmin
Notable featuressatellite galaxy of the Andromeda Galaxy
Other designations
And VIII, PGC 5056928

As of at least 2006, the actuality of And VIII as a galaxy has not yet been firmly established (Merrett et al. 2006).[2]

See also

References
  1. "NAME Andromeda VIII". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 17 March 2018.
  2. 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, arXiv:astro-ph/0603125, Bibcode:2006MNRAS.369..120M, doi:10.1111/j.1365-2966.2006.10268.x


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