RD1 or 0140+326 RD1 is a distant galaxy, it once held the title of most distant galaxy known. RD1 was discovered in March 1998, and is at z = 5.34, and was the first object found to exceed redshift 5. 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.
In the Vinony graph
Vinony's link graph records 84 inbound references to RD1, and connects out to list of stars in Triangulum, HD 9446 and Triangulum.
It sits within the topics Galaxies and Triangulum.
Vinony links it to 5 Wikipedia language editions.
Wikidata facts
- Instance of
- galaxy
- Constellation
- Triangulum
Show 5 more facts
- redshift
- 5.348
- epoch
- J2000.0
- right ascension
- 25.889750
- declination
- 32.899972
- radial velocity
- 285274
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Encyclopedic overview
2 sectionsContents
- Distance measurements
- References
RD1 or 0140+326 RD1 is a distant galaxy, it once held the title of most distant galaxy known. RD1 was discovered in March 1998, and is at z = 5.34, and was the first object found to exceed redshift 5. 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.
==Distance measurements== The "distance" of a far away galaxy depends on the chosen distance measurement. With a redshift of 5.34, light from this galaxy is estimated to have taken around 12.5 billion years to reach us. But since this galaxy is receding from Earth, the present comoving distance is estimated to be around 26 billion light-years.
Excerpted from Wikipedia’s “RD1” article, available under the CC BY-SA 4.0 licence.