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This is a list of solar system's planetary bodies orbiting the Sun by planetary discriminant, in decreasing order, where the planetary discriminant μ is a term introduced by Steven Soter as the ratio between the mass of the body and the total mass of the other non-resonating and non-satellite bodies in the same orbital zone, in the sense of Soter. Also listed is the Stern-Levinson parameter Λ, the square of the mass over the orbital period, normalized to the Earth values(Λ/ΛE). The planetary discriminant is related to the question of defining what a planet is.
| Rank |
Name |
Image |
Stern-Levinson parameter Λ/ΛE; |
Planetary discriminant μ |
Mass (kg) |
Type of object |
| 1 |
Earth |
|
1.00 |
1.7×106 |
(5.9736×1024 kg) |
3rd planet |
| 2 |
Venus |
|
1.08 |
1.35×106 |
(4.8685×1024 kg) |
2nd planet |
| 3 |
Jupiter |
|
8510 |
6.25×105 |
(1.899×1027 kg) |
5th planet |
| 4 |
Saturn |
|
308 |
1.9×105 |
(5.6846×1026 kg) |
6th planet |
| 5 |
Mars |
|
0.0061 |
1.8×105 |
(6.4185×1023 kg) |
4th planet |
| 6 |
Mercury |
|
0.0126 |
9.1×104 |
(3.302×1023 kg) |
1st planet |
| 7 |
Uranus |
|
2.51 |
2.9×104 |
(8.6832×1025 kg) |
7th planet |
| 8 |
Neptune |
|
1.79 |
2.4×104 |
(1.0243×1026 kg) |
8th planet |
| 9 |
Ceres |
|
8.7×10−9 |
0.33 |
9.5×1020 kg |
1st dwarf planet |
| 10 |
Eris |
|
3.5×10−8 |
0.10 |
(1.5×1022 kg)[1] |
3rd dwarf planet |
| 11 |
Pluto |
|
1.95×10−8 |
0.077 |
(1.29×1022 ± 10% kg) |
2nd dwarf planet |
[edit] See also
- ^ Very rough estimate based on a diameter of 2400 km and composition similar to that of Pluto.
[edit] References
