| IOK-1 | |
|---|---|
 IOK-1 by theSubaru Telescope | |
| Observation data (J2000epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 13h 23m 59.8s[1] |
| Declination | +27° 24′ 56″[1] |
| Redshift | 6.964[1] |
| Distance | 12.88 billionlight-years (3.95 Gpc) |
| Apparent magnitude (V) | 24.4 |
| Characteristics | |
| Type | LAE |
| Size | 4,000 ly (1,200 pc) (diameter) 2,000 ly (610 pc) (radius) |
| Apparent size (V) | 0.001 x 0.001 |
| Other designations | |
| JEM2013 62, OIK2017 NB973-SDF-85821, OMS2009 SDF-63544[1] | |
IOK-1 is a distantgalaxy in theconstellationComa Berenices. When discovered in 2006, it was the oldest and most distant galaxy ever found, atredshift 6.96.[2]
It was discovered in April 2006 byMasanori Iye atNational Astronomical Observatory of Japan using theSubaru Telescope inHawaii and is seen as it was 12.88billion years ago. Its emission ofLyman alpha radiation has a redshift of 6.96, corresponding to just 750 million years after theBig Bang. While some scientists have claimed other objects (such asAbell 1835 IR1916) to be even older, the IOK-1's age and composition have been more reliably established.[3][4]
"IOK" stands for the observers' names Iye, Ota, and Kashikawa.
| Preceded by | Most distant astronomical object 2006–2009 | Succeeded by |
| Preceded by | Most distant galaxy 2006–2011 | Succeeded by |
