EGSY8p7
EGSY8p7 (EGSY-2008532660) is a distant galaxy in the constellation of Boötes, with a spectroscopic redshift of z = 8.68 (photometric redshift 8.57), a light travel distance of 13.2 billion light-years from Earth. Therefore, at an age of 13.2 billion years, it is observed as it existed 570 million years after the Big Bang, which occurred 13.8 billion years ago, using the W. M. Keck Observatory. In July 2015, EGSY8p7 was announced as the oldest and most-distant known object, surpassing the previous record holder, EGS-zs8-1, which was determined in May 2015 as the oldest and most distant object. In March 2016, Pascal Oesch, one of the discoverers of EGSY8p7, announced the discovery of GN-z11, an older and more distant galaxy.
| EGSY8p7 EGSY-2008532660 | |
|---|---|
EGSY8p7 by the Hubble and Spitzer space telescopes | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major/Boötes |
| Right ascension | 14h 20m 08.50s |
| Declination | +52° 53′ 26.60″ |
| Redshift | 8.683+0.001 −0.004 |
| Heliocentric radial velocity | 2,603,098 km/s (1,617,490 mi/s) |
| Galactocentric velocity | 2,603,221 km/s (1,617,567 mi/s) |
| Distance | 13.2 billion ly (4.0 billion pc) (light travel distance) 30.5 billion ly (9.4 billion pc) (comoving distance) |
| Apparent magnitude (V) | 25.3 |
| Other designations | |
| EGSY8p7, EGS8p7 | |
The galaxy contains a supermassive black hole, CEERS 1019.