Abell 2142 is part of the Abell catalogue of rich clusters of galaxies originally published by UCLA astronomer George O. Abell (19271983) in 1958. It has a heliocentric redshift of 0.0909 (meaning it is moving away from us at 27,250 km/s) and a visual magnitude of 16.0. It is about 1.2 billion light years (380 megaparsecs) away.