SSTGFLS J222557+601148 ‎– Einstein Cross

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1 Einstein Cross 1:06:13

Notes

The Einstein Cross (Q2237+030 or QSO 2237+0305) is a gravitational lensed quasar that sits directly behind ZW 2237+030, Huchra's Lens. Four images of the same distant quasar appear around a foreground galaxy due to strong gravitational lensing.

The quasar's redshift indicated that it is located about 8 billion light years from Earth, while the lensing galaxy is at a distance of 400 million light years. The apparent dimensions of the entire foreground galaxy are 0.87x0.34 arcminutes, while the apparent dimension of the cross in its centre accounts for only 1.6x1.6 arcseconds.

The Einstein Cross can be found in Pegasus at 22h 40m 30.3s, +3° 21′ 31″.

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