In 2003 RDCS 1252-29 (RDCS1252.9–2927) at z=1.237, was found to be the most distant rich cluster, which lasted until 2005.
2003'te RDCS 1252-29 (RDCS1252.9–2927) z=1,237 olarak ölçüldü ve 2005 yılına kadar en uzak zengin küme'ydi.