RD1 (0140+326 RD1) | |
---|---|
Observation data ( J2000 epoch) | |
Constellation | Triangulum |
Right ascension | 01h 43m 42.8s |
Declination | +32° 54′ 00.0″ |
Redshift | 5.34 [1] |
Distance | around 12.5
billion
light-years ( light travel distance) [2] ~26 billion light-years (present comoving distance) [2] |
Apparent magnitude (V) | 26.1 |
Other designations | |
[DS98] 6C 0140+326 RD1 |
RD1 or 0140+326 RD1 is a distant galaxy, it once held the title of most distant galaxy known. [3] RD1 was discovered in March 1998, and is at z = 5.34, [1] and was the first object found to exceed redshift 5. [4] It bested the previous recordholders, a pair of galaxies at z=4.92 lensed by the galaxy cluster CL 1358+62 ( CL 1358+62 G1 & CL 1358+62 G2). It was the most distant object known to mankind for a few months in 1998, until BR1202-0725 LAE was discovered at z = 5.64.
The "distance" of a far away galaxy depends on the chosen distance measurement. With a redshift of 5.34, [1] light from this galaxy is estimated to have taken around 12.5 billion years to reach us. [2] But since this galaxy is receding from Earth, the present comoving distance is estimated to be around 26 billion light-years. [2]
RD1 (0140+326 RD1) | |
---|---|
Observation data ( J2000 epoch) | |
Constellation | Triangulum |
Right ascension | 01h 43m 42.8s |
Declination | +32° 54′ 00.0″ |
Redshift | 5.34 [1] |
Distance | around 12.5
billion
light-years ( light travel distance) [2] ~26 billion light-years (present comoving distance) [2] |
Apparent magnitude (V) | 26.1 |
Other designations | |
[DS98] 6C 0140+326 RD1 |
RD1 or 0140+326 RD1 is a distant galaxy, it once held the title of most distant galaxy known. [3] RD1 was discovered in March 1998, and is at z = 5.34, [1] and was the first object found to exceed redshift 5. [4] It bested the previous recordholders, a pair of galaxies at z=4.92 lensed by the galaxy cluster CL 1358+62 ( CL 1358+62 G1 & CL 1358+62 G2). It was the most distant object known to mankind for a few months in 1998, until BR1202-0725 LAE was discovered at z = 5.64.
The "distance" of a far away galaxy depends on the chosen distance measurement. With a redshift of 5.34, [1] light from this galaxy is estimated to have taken around 12.5 billion years to reach us. [2] But since this galaxy is receding from Earth, the present comoving distance is estimated to be around 26 billion light-years. [2]