Editing Fine-structure constant (section)

=== History of measurements ===
{| class="wikitable"
|+ Successive values determined for the fine-structure constant<ref name="The number 137.035... at MROB">
 {{cite web
  |title = The number 137.035...
  |website=MROB
  |url=https://mrob.com/pub/num/n-b137_035.html
 }}</ref>{{efn|Numbers in parentheses (e.g. the "(11)" appearing at the end of the value "137.035999206(11)") give its [[standard uncertainty]] referred to the least significant preceding digit.}}
! Date
! {{math|''α''}}
! {{math|1/''α''}}
! Sources
|-
| 1969 Jul
| 0.007297351(11)
| 137.03602(21)
| CODATA 1969
|-
| 1973
| 0.0072973461(81)
| 137.03612(15)
| CODATA 1973
|-
| 1987 Jan
| 0.00729735308(33)
| 137.0359895(61)
| CODATA 1986
|-
| 1998
| 0.007297352582(27)
| 137.03599883(51)
| Kinoshita
|-
| 2000 Apr
| 0.007297352533(27)
| 137.03599976(50)
| CODATA 1998
|-
| 2002
| 0.007297352568(24)
| 137.03599911(46)
| CODATA 2002
|-
| 2007 Jul
| 0.0072973525700(52)
| 137.035999070(98)
| Gabrielse (2007)
|-
| 2008 Jun
| 0.0072973525376(50)
| 137.035999679(94)
| CODATA 2006
|-
| 2008 Jul
| 0.0072973525692(27)
| 137.035999084(51)
| Gabrielse (2008), Hanneke (2008)
|-
| 2010 Dec
| 0.0072973525717(48)
| 137.035999037(91)
| Bouchendira (2010)
|-
| 2011 Jun
| 0.0072973525698(24)
| 137.035999074(44)
| CODATA 2010
|-
| 2015 Jun
| 0.0072973525664(17)
| 137.035999139(31)
| CODATA 2014
|-
| 2017 Jul
| 0.0072973525657(18)
| 137.035999150(33)
| Aoyama ''et al''. (2017)<ref name=Aoyama-2018>
 {{cite journal
  |first1=Tatsumi  |last1=Aoyama
  |first2=Toichiro |last2=Kinoshita
  |first3=Makiko   |last3=Nio
  |date=8 February 2018
  |title=Revised and improved value of the QED tenth-order electron anomalous magnetic moment
  |journal=[[Physical Review D]]
  |volume=97 |issue=3 |page=036001
  |doi=10.1103/PhysRevD.97.036001 |arxiv=1712.06060
  |bibcode=2018PhRvD..97c6001A |s2cid=118922814
 }}</ref>
|-
| 2018 Dec
| 0.0072973525713(14)
| 137.035999046(27)
| Parker, Yu, ''et al''. (2018)<ref name="Parker">
 {{cite journal
  |first1=Richard H. |last1=Parker       |first2=Chenghui |last2=Yu
  |first3=Weicheng   |last3=Zhong        |first4=Brian    |last4=Estey
  |first5=Holger     |last5=Müller
  |year=2018
  |title=Measurement of the fine-structure constant as a test of the Standard Model
  |journal=[[Science (journal)|Science]]
  |volume=360 |issue=6385 |pages=191–195
  |doi=10.1126/science.aap7706
  |pmid=29650669 |arxiv=1812.04130 |bibcode=2018Sci...360..191P |s2cid=4875011
 }}</ref>
|-
| 2019 May
| 0.0072973525693(11)
| 137.035999084(21)
| CODATA 2018
|-
| 2020 Dec
| 0.0072973525628(6)<!--Reciprocals of published max/avg/min are ...622014/...627871/...633729, rounded to ...622/628/634-->
| 137.035999206(11)
| Morel ''et al''. (2020)<ref name="morel2020"/>
|-
| 2022 Dec
| 0.0072973525643(11)
| 137.035999206(21) 
| CODATA 2022
|-
| 2023 Feb
| 0.0072973525649(8)
| 137.035999166(15)
| Fan ''et al''. (2023)<ref name=":0" />{{efn|This is not an experimentally measured value; instead it is a value determined ''by the current theory'' from an experimentally determined value of the [[electron magnetic moment]].}}
|}

The CODATA values in the above table are computed by averaging other measurements; they are not independent experiments.