This is basically the calculator on Chris Dolan's webpage
with a couple more buttons added for high-energy astrophysicists. See at
the bottom of the page for more details.
This calculator only
works if your browser can process JavaScript.
The Units switch above does not change the units of your calculation!
It only specifies the units of the constants buttons for future entries!
NAME |
SYMBOL
|
NUMBER |
CGS UNITS |
Velocity of light |
c |
2.998 x 1010 |
cm s-1 |
Planck constant |
h |
6.626
x 10-27 |
erg s |
Gravitational constant |
G |
6.67
x 10-8 |
cm3 g-1 s-2 |
Electron charge |
e |
4.803
x 10-10 |
esu |
Mass of electron |
m_e |
9.1096
x 10-28 |
g |
Mass of proton |
m_p |
1.6724
x 10-24 |
g |
Mass of neutron |
m_n |
1.6747
x 10-24 |
g |
Mass of hydrogen |
m_H |
1.6733
x 10-24 |
g |
Atomic mass unit |
amu |
1.661
x 10-24 |
g |
Avagadro's number |
N_A |
6.0222
x 1023 |
|
Boltzmann constant |
k |
1.38
x 10-16 |
erg K-1 |
Electron volt |
ev |
1.602
x 10-12 |
erg |
Rad'n density constant |
a |
7.5646
x 10-15 |
erg cm-3 K-4 |
Stefan-Boltzmann const |
sigma |
5.67
x 10-5 |
erg cm-2 K-4 s-1 |
|
Wien's const |
b |
2.899x10-3 |
m K |
Thomson cross section |
sigma_T |
6.6524
x 10-25 |
cm2 |
|
Electron rest mass energy |
E_e |
8.18710414
x 10-7 |
erg |
|
Fine structure constant |
\alpha |
7.29735308 x 10-3 |
Rydberg constant |
R |
2.17992
x 10-11 |
erg |
Year |
yr |
3.156
x 107 |
s |
Astronomical unit |
AU |
1.496
x 1013 |
cm |
Parsec |
pc |
3.086
x 1018 |
cm |
Light year |
ly |
9.463
x 1017 |
cm |
Solar mass |
M_sun |
1.99 x 1033 |
g |
Solar radius |
R_sun |
6.96 x 1010 |
cm |
Solar Luminosity |
L_sun |
3.9 x 1033 |
erg s-1 |
Solar Temperature |
T_sun |
5780 |
K |
In the calculator above, the Period has been converted to seconds and
the Semi-Major Axis has been changed to cm.
Name |
Mass (g) |
Radius (cm) |
Period (yr) |
Semi-Major (AU) |
Eccentricity |
Mercury |
3.303 x 1026 |
2.439 x 108 |
2.4085 x 10-1 |
3.87096 x 10-1 |
0.205622 |
Venus |
4.87 x 1027 |
6.05 x 108 |
6.1521 x 10-1 |
7.23342 x 10-1 |
0.006783 |
Earth |
5.976 x 1027 |
6.378 x 108 |
1.00004 x 100 |
9.99987 x 10-1 |
0.016684 |
Mars |
6.418 x 1026 |
3.397 x 108 |
1.88089 x 100 |
1.523705 x 100 |
0.093404 |
Jupiter |
1.899 x 1030 |
7.14 x 109 |
1.18622 x 101 |
5.204529 x 100 |
0.047826 |
Saturn |
5.686 x 1029 |
6 x 109 |
2.94577 x 101 |
9.575133 x 100 |
0.052754 |
Uranus |
8.66 x 1028 |
2.615 x 109 |
8.40139 x 101 |
1.930375 x 101 |
0.050363 |
Neptune |
1.03 x 1029 |
2.43 x 109 |
1.64793 x 102 |
3.020652 x 101 |
0.004014 |
Pluto |
1 x 1025 |
1.2 x 108 |
2.47686 x 102 |
3.991136 x 101 |
0.256695 |
Note: This calculator was written and tested on a Unix
computer. If it looks bad to you, try making your window wider. The
calculator looks especially bad on Macs, unfortunately...
Most of the JavaScript code for this calculator came (with permission)
from the
Scientific Calculator by Rolf Howarth. (rolf@insect.demon.co.uk)
The code for the comment field at the top of the page came from Bruce
Busby (bbusby@umich.edu)
2008-Nov-26 : Initial code from
http://www.astro.wisc.edu/~dolan/constants/calc.html (DM)
2008-Nov-26 : Added Thomson cross section and electron rest mass
energy (DM)
Constants Page
|