A1689-zD1
Sign in to saveA1689-zD1 is a galaxy in the Virgo constellation. It was a candidate for the most distant and therefore earliest-observed galaxy discovered , based on a photometric redshift.
Key facts
- Galaxy.name
- A1689-zD1
- Galaxy.image
- A1689-zD1.jpg
- Galaxy.caption
- Location of A1689-zD1 in infrared and visible light by Hubble Space Telescope and Spitzer Space Telescope
- Galaxy.epoch
- J2000
- Galaxy.constellation name
- Virgo
- Galaxy.z
- 7.6
- Galaxy.h_radial_v
- 2,278,423 km/s
- Galaxy.gal_v
- 2,278,351 +/- 3 km/s
- Galaxy.dist_ly
- 13 billion light-years(light travel distance) 30 billion light-years (present proper distance)
- Galaxy.group_cluster
- Abell 1689
- Galaxy.type
- Dwarf
- Galaxy.appmag_v
- 25.3
- Galaxy.size
- ~3,000 ly (diameter)
- Galaxy.size_v
- 0.0008 x 0.0008
- Galaxy.names
- BBF2008 A1689-zD1
via Wikipedia infobox
Wikidata facts
Show 10 more facts
- Commons category
- A1689-zD1
- redshift
- 7.6
- site of astronomical discovery
- Hubble Space Telescope
- time of discovery or invention
- 2008-02-00
- right ascension
- 197.874833
- declination
- -1.321861
- apparent magnitude
- 24.7
- epoch
- J2000.0
- radial velocity
- 291794
- different from
- Abell 1689
Sources (2)
via Wikidata · CC0
~1 min read
Encyclopedic overview
2 sectionsContents
- See also
- References
A1689-zD1 is a galaxy in the Virgo constellation. It was a candidate for the most distant and therefore earliest-observed galaxy discovered , based on a photometric redshift.
If its redshift of z = ~7.6 is correct, it would explain why the galaxy's faint light reaches us at infrared wavelengths. It could only be observed with Hubble Space Telescope's Near Infrared Camera and Multi-Object Spectrometer (NICMOS) and the Spitzer Space Telescope's Infrared Array Camera exploiting the natural phenomenon of gravitational lensing: the galaxy cluster Abell 1689, which lies between Earth and A1689-zD1, at a distance of 2.2 billion light-years from us, functions as a natural "magnifying glass" for the light from the far more distant galaxy which lies directly behind it, at 700 million years after the Big Bang, as seen from Earth.
Excerpted from Wikipedia’s “A1689-zD1” article, available under the CC BY-SA 4.0 licence.