RBC EXT8 is a globular cluster in the galaxy Messier 31, 27 kpc from the Galaxy Center. The spectral lines reveal levels of iron 800 times lower than the Sun. Its position is right ascension 00h53m14s.53, declination +41°33′24′′. (J2000 equinox) according to the Revised Bologna Catalogue (10). Its magnitude is 15.79, and 15.5" across.
References
- An extremely metal-deficient globular cluster in the Andromeda Galaxy 14 Oct 2020, Søren S. Larsen, Aaron J. Romanowsky, Jean P. Brodie, Asher Wasserman,
- The outer halo globular cluster system of M31 - I. The final PAndAS catalogue Monthly Notices of the Royal Astronomical Society · April 2014
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