| Name | Symbol | Number | Exp | CGS Units | Relative Error (ppm) |
|---|---|---|---|---|---|
| speed of light in a vacuum | c | 2.99792458 | 10 | cm s-1 | exact |
| Planck constant | h | 6.6260755(40) | -27 | erg s | 0.60 |
| hbar | 1.05457266(63) | -27 | erg s | 0.60 | |
| Gravitational constant | G | 6.67259(85) | -8 | cm3 g-1 s-2 | 128 |
| Electron charge | e | 4.8032068(14) | -10 | esu | 0.30 |
| Mass of electron | me | 9.1093897(54) | -28 | g | 0.59 |
| Mass of proton | mp | 1.6726231(10) | -24 | g | 0.59 |
| Mass of neutron | mn | 1.6749286(10) | -24 | g | 0.59 |
| Mass of hydrogen | mH | 1.6733 | -24 | g | -- |
| Atomic mass unit | amu | 1.6605402(10) | -24 | g | 0.59 |
| Avagadro's number | NA | 6.0221367(36) | 23 | 0.59 | |
| Boltzmann constant | k | 1.380658(12) | -16 | erg k-1 | 8.5 |
| Electron volt | eV | 1.6021772(50) | -12 | erg | ~0.60 |
| Radiation density constant | a | 7.5646 | -15 | erg cm-3 K-4 | -- |
| Stefan-Boltzmann constant | \sigma | 5.67051(19) | -5 | erg cm-2 K-4 s-1 | 34 |
| Fine structure constant | \alpha | 7.29735308(33) | -3 | 0.045 | |
| Rydberg constant | R\inf | 2.1798741(13) | -11 | erg | 0.60 |
NAME SYMBOL NUMBER EXP CGS UNITS ---------------------------------------------------------------- Astronomical unit AU 1.496 13 cm Parsec pc 3.086 18 cm Light year ly 9.463 17 cm Solar mass Mo 1.99 33 g Solar radius Ro 6.96 10 cm Solar luminosity Lo 3.9 33 erg s-1 Solar Temperature To 5.780 3 K ----------------------------------------------------------------
NAME MASS (g) RADIUS (cm) PERIOD (yr) SEMI-MAJOR (AU) ECCENTRICITY ---------------------------------------------------------------------- Mercury 3.303 26 2.439 8 2.4085 -1 3.87096 -1 0.205622 Venus 4.870 27 6.050 8 6.1521 -1 7.23342 -1 0.006783 Earth 5.976 27 6.378 8 1.00004 0 9.99987 -1 0.016684 Mars 6.418 26 3.397 8 1.88089 0 1.523705 0 0.093404 Jupiter 1.899 30 7.140 9 1.18622 1 5.204529 0 0.047826 Saturn 5.686 29 6.000 9 2.94577 1 9.575133 0 0.052754 Uranus 8.66 28 2.615 9 8.40139 1 1.930375 1 0.050363 Neptune 1.030 29 2.43 9 1.64793 2 3.020652 1 0.004014 Pluto 1. 25 1.2 8 2.47686 2 3.991136 1 0.256695 ----------------------------------------------------------------------
| CGS | --> | SI | Multiply by |
|---|---|---|---|
| centimeter (cm) | meter (m) | 10-2 | |
| gram (g) | kilogram (kg) | 10-3 | |
| erg | Joule (J) | 10-7 | |
| dyne (dyn) | newton (N) | 10-5 |