F200DB-045

{{use dmy dates|date=January 2023}}

{{Short description|Possibly one of the oldest galaxies observed}}

{{Infobox galaxy

| name = F200DB-045

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| constellation name = Volans

| epoch = J2000

| ra = {{RA|07|23|22.770}}{{cite simbad|title=[YML2023] F200DB-045|access-date=2024-10-26}}

| dec = {{DEC|-73|27|39.72}}

| z = {{val|20.4}}{{cite journal |author=Adams, N.J. |display-authors=et al |title=Discovery and properties of ultra-high redshift galaxies (9 < z < 12) in the JWST ERO SMACS 0723 Field |url=https://academic.oup.com/mnras/article/518/3/4755/6835532 |date=January 2023 |journal=Monthly Notices of the Royal Astronomical Society |volume=518 |issue=3 |pages=4755–4766 |doi=10.1093/mnras/stac3347 |doi-access=free |accessdate=2 January 2023 |arxiv=2207.11217 }}{{cite journal|title=First Batch of z ≈ 11–20 Candidate Objects Revealed by the James Webb Space Telescope Early Release Observations on SMACS 0723-73|first=Haojing|last=Yan|display-authors=etal|journal=The Astrophysical Journal Letters|date=January 2023|volume=942|issue=L9|pages=20|doi-access=free|doi=10.3847/2041-8213/aca80c|arxiv=2207.11558|bibcode=2023ApJ...942L...9Y}}

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F200DB-045 is a candidate high-redshift galaxy, with an estimated redshift of approximately z = 20.4, corresponding to 168 million years after the Big Bang.{{cite web |last=Wright |first=Edward L.|title=Ned Wright's Javascript Cosmolgy Calculator |url=https://www.astro.ucla.edu/~wright/CosmoCalc.html|date=2022 |publisher=University of California, Los Angeles |accessdate=24 November 2022}} (H₀=67.4 and Omega_M=0.315 (see Table/Planck2018 at "Lambda-CDM model#Parameters" ) If confirmed, it would be one of the earliest and most distant known galaxies observed.

F200DB-045 would have a light-travel distance (lookback time) of 13.7 billion years, and, due to the expansion of the universe, a present proper distance of 36.1 billion light-years.

Nonetheless, the redshift value of the galaxy presented by the procedure in one study may differ from the values presented in other studies using different procedures.{{cite journal |arxiv=2208.01612v3|last1=Harikane |first1=Yuichi |last2=Ouchi |first2=Masami |last3=Oguri |first3=Masamune |last4=Ono |first4=Yoshiaki |last5=Nakajima |first5=Kimihiko |last6=Isobe |first6=Yuki |last7=Umeda |first7=Hiroya |last8=Mawatari |first8=Ken |last9=Zhang |first9=Yechi |title=A Comprehensive Study of Galaxies at z ∼ 9–16 Found in the Early JWST Data: Ultraviolet Luminosity Functions and Cosmic Star Formation History at the Pre-reionization Epoch |journal=The Astrophysical Journal Supplement Series |year=2023 |volume=265 |issue=1 |page=5 |doi=10.3847/1538-4365/acaaa9 |bibcode=2023ApJS..265....5H |doi-access=free }}