# Dipole Moments of the Planets and the sun

1. Oct 30, 2008

### Philosophaie

I am wondering if there is a source of the magniude of the Dipole moments of all the planets and the sun, m.

m(earth) is 8*10^22 A*m^2.

The Magnetic Field and the Electric Field such that:

Br = Mu0/4/pi*2*m*cos(Theta)/r^3
Btheta = Mu0/4/pi*m*sin(Theta)/r^3
Mphi = 0
Er = 1/4/pi/Epsilon*2*m*cos(Theta)/r^3
Etheta = 1/4/pi/Epsilon*m*sin(Theta)/r^3
Ephi = 0

I know that they actually fluctuate due to changing solar activities,ie solar flares and planetary topograpy but I want the average magnitudes just the same. Does anyone have this data or website?

2. Oct 31, 2008

### Philosophaie

Found this link on the Nasa website. Anybody know why Sun, Venus and Mars are missing?

http://lepmfi.gsfc.nasa.gov/mfi/lepedu/planets.htm [Broken]

Last edited by a moderator: May 3, 2017
3. Oct 31, 2008

### Orion1

planetary magnetic dipole moments...

The Systeme International (S.I.) units for planetary magnetic dipole moments is:
$$\mu = \frac{\text{N} \cdot \text{m}}{\text{T}}$$
Newton-meters per Tesla.

All the currently available planetary magnetic dipole moments are available at creationwiki.org.

Planetary magnetic dipole moments (at present):
0 3.5 * 10^29 N-m/T Sol
1 3.8 * 10^19 N-m/T Mercury
2 8.0 * 10^17 N-m/T Venus
3 7.98 * 10^22 N-m/T Earth
4 2.1 * 10^18 N-m/T Mars
5 N/A Ceres
6 1.55 * 10^27 N-m/T Jupiter
7 4.6 * 10^25 N-m/T Saturn
8 3.0 * 10^24 N-m/T Uranus
9 1.5 * 10^24 N-m/T Neptune
10 N/A Pluto

In Terra units:
0 4385965
1 4.761905E-04
2 1.002506E-05
3 1
4 2.631579E-05
5 N/A
6 19423.56
7 576.4411
8 37.59398
9 18.79699
10 N/A

Interesting to note that the planetary magnetic moments decay with time.

Lunar: 1.3 * 10^15 N-m/T

Reference:
Sun - Creationwiki
Solar System - scale image - Wikipedia
Solar system moons - scale image - Creationwiki
Ceres-Earth-Moon comparison - Wikipedia
Table of the planets - NASA

Last edited: Oct 31, 2008