Porphyrion (radio galaxy)
| J152932.16+601534.4 | |
|---|---|
Radio image of Porphyrion, a black hole jet system spanning an estimated 23 million light-years. The image, taken with the LOFAR HBA at a central observing frequency of 144 MHz, has an effective resolution of 6.2" and covers 15' × 15' of sky. The Milky Way (assumed diameter: 50 kpc) is shown for scale. | |
| Observation data (J2000 epoch) | |
| Constellation | Draco |
| Right ascension | 15h 29m 32.16s |
| Declination | +60° 15′ 34.4″ |
| Redshift | 0.896±0.001 |
| Distance | 7.5 billion light-years |
| Notable features | Giant radio galaxy |
| Other designations | |
| Porphyrion, J152932.16+601534.4 | |
References: | |
Porphyrion is a Fanaroff–Riley class II radio galaxy located 7.5 billion light years away from Earth, with host galaxy J152932.16+601534.4. It is located in the constellation Draco and it was discovered in Low-Frequency Array (LOFAR) data by an international team led by Martijn Oei. Porphyrion has the longest jets of any radio galaxy identified, with lobed structures spanning 7 megaparsecs (23 million light-years) across, making it the largest known structure of galactic origin. It superseded Alcyoneus, discovered by the same team in 2022, with lobed structures of 5 megaparsecs (16 million light-years).