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Table 3
IAU-recommended basic units.
| Quantity | Unit | Meaning | Notes |
|
|
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| SI base & supplementary units | |||
| length | m | meter | |
| mass | kg | kilogram | g gram allowed |
| time | s | second | |
| plane angle | rad | radian | |
| solid angle | sr | steradian | |
| temperature | K | kelvin | |
| electric current | A | ampere | |
| amount of substance | mol | mole | |
| luminous intensity | cd | candela | |
| IAU-recognized derived units | |||
| frequency | Hz | hertz | s-1 |
| energy | J | joule | N m |
| power | W | watt | J s-1 |
| electric potential | V | volt | J C-1 |
| force | N | newton | kg m s-2 |
| pressure, stress | Pa | pascal | N m-2 |
| electric charge | C | coulomb | A s |
| electric resistance | Ohm | ohm | V A-1 |
| electric conductance | S | siemens | A V-1 |
| electric capacitance | F | farad | C V-1 |
| magnetic flux | Wb | weber | V s |
| magnetic flux density | T | tesla | Wb m-2 |
| inductance | H | henry | Wb A-1 |
| luminous flux | lm | lumen | cd sr |
| illuminance | lx | lux | lm m-2 |
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