| HD1 | |
|---|---|
 Three-color image of HD1, the most distant galaxy candidate to date, created using data from the VISTA telescope in Paranal Observatory. The red object in the center of the zoom-in image is HD1.[1] | |
| Observation data (J2000 epoch) | |
| Constellation | Sextans[2][3] |
| Right ascension | 10h 01m 51.31s[2] |
| Declination | 02° 32′ 50.0″[2] |
| Redshift | 13.27[2] |
| Distance |
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HD1 is a proposed high-redshift galaxy, which is considered (as of April 2022) to be one of the earliest and most distant known galaxies yet identified in the observable universe. The galaxy, with an estimated redshift of approximately z = 13.27, is seen as it was about 324 million years after the Big Bang, which was according to scientists around 13.787 billion years ago.[6] It has a light-travel distance (lookback time) of 13.463 billion light-years from Earth, and, due to the expansion of the universe, a present proper distance of 33.288 billion light-years.[5]
- ^ Cite error: The named reference
ALMA-20220407was invoked but never defined (see the help page). - ^ a b c d Cite error: The named reference
ARX-20220212was invoked but never defined (see the help page). - ^ Cite error: The named reference
DJM-2008was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
NS-20220407was invoked but never defined (see the help page). - ^ a b Kempner, Joshua (2022). "KEMPNER Cosmology Calculator". Kempner.net. Retrieved 6 August 2022. KEMP Cosmology Calculator - Set H0=67.4 and OmegaM=0.315 (see Table/Planck2018 at "Lambda-CDM model#Parameters")
- ^ Planck Collaboration (2020). "Planck 2018 results. VI. Cosmological parameters". Astronomy & Astrophysics. 641. page A6 (see PDF page 15, Table 2: "Age/Gyr", last column). arXiv:1807.06209. Bibcode:2020A&A...641A...6P. doi:10.1051/0004-6361/201833910. S2CID 119335614.