GHZ2
| GHZ2 | |
|---|---|
Close-up view of GLASS-z12 from the James Webb Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Sculptor |
| Right ascension | 00h 13m 59.76s |
| Declination | −30° 19′ 29.1″ |
| Redshift | 12.117±0.012 (spectroscopic) 12.4+0.1 −0.3 12.42+0.27 −0.14 12.28+0.08 −0.07 |
| Distance |
|
| Apparent magnitude (V) | 27.0 AB (F200W) |
| Characteristics | |
| Mass | ≈1.0×109 M☉ |
| Size | ~3000 ly (1 kpc) |
| Half-light radius (physical) | 500 pc |
| Other designations | |
| GHZ2 · GLASS-17487 | |
References: | |
GHZ2, also named GLASS-z12 (formerly known as GLASS-z13) is a Lyman-break galaxy discovered by the Grism Lens-Amplified Survey from Space (GLASS) observing program using the James Webb Space Telescope's NIRCam in July 2022.
It has a spectroscopic redshift of 12.34, making it one of the most distant galaxies and astronomical objects ever discovered. According to current theory, this redshift corresponds to a time about 13.44 billion years ago, approximately 355 million years after the Big Bang, or about 2.57% of its current age.