Galaxy Groups and Clusters Observing Guide: Challenge Object

Galaxy Groups and Clusters Observing Guide

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Challenge Object - Einstein’s Cross

A galaxy lensing quasar, with components 17^th to 18^th magnitude, is a interesting challenge object visible with medium sized scopes, although larger apertures are required to resolve structural details.

Const. Pegasus
RA 22h 40m 30s, DEC +03d 21m 30s.

        Credits: Sangeeta Malhotra (JHU), Ian
      Dell’Antonio (Brown), James Rhodes
      (STScI), WIYN, AURA, NOAO, NSF.
      Image used with permission.