Constellation Sagittarius Declination −32° 51′ 45.13″ Type Quasar | Right ascension 20 03 24.116 Redshift 3.773
274,681 km/s | |
 | ||
Distance 11.7 billion light-years
(Light travel time)
22.7 billion light-years
(present) | ||
PKS 2000-330 (also known as QSO B2000-330) is a quasar located in the constellation Sagittarius. When identified in 1982, it was the most distant and most luminous object known.
Distance measurements
The "distance" of a far away galaxy depends on what distance measurement you use. With a redshift of 3.77, light from this active galaxy is estimated to have taken around 11.7 billion years to reach us. But since this galaxy is receding from Earth at an estimated rate of 274,681 km/s (the speed of light is 299,792 km/s), the present (co-moving) distance to this galaxy is estimated to be around 22.7 billion light-years (6947 Mpc).
References
PKS 2000-330 Wikipedia(Text) CC BY-SA