second

of arc
https://doi.org/10.1351/goldbook.S05514
Non-SI unit of plane angle: 1′′=13600 ⚬=4.848 137...× 10−6 rad.
Sources:
Green Book, 2nd ed., p. 113 [Terms] [Book]
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 991 [Terms] [Paper]
Citation: 'second' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.S05514 RIS BibTex EndNote
Div. IDiv. VIIPDFTextXMLJSON
Last revised: February 24, 2014