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| Planetary Body | Semi-Major Axis (AU for planets, 1000 km for satellites |
Orbital Period (Days or Years) |
Rotation Period (Days) |
Density (gm/cm3) |
Diameter (km) |
Surface Composition | Atmosphere Compositions |
Mercury |
0.387 | 87.97 | 58.65 | 5.44 | 4800 | basaltic | Na (thin) |
Venus |
0.723 | 224.7 | 243.0R | 5.25 | 12104 | basaltic | CO2 |
Earth |
1.000 | 365.26 | 1.00 | 5.52 | 12756 | basaltic& H2O | N2 + O2 |
*Moon |
384 | 27.3 | 27.3 | 3.34 | 3476 | basaltic | none |
Mars |
1.524 | 686.98 | 1.03 | 3.93 | 6787 | basaltic | CO2 |
Asteroids |
2.362 2.768 2.773 |
3.63y 4.61y 4.62y |
0.22 0.38 0.33 |
2.9 ? ? |
520 932 533 |
basaltic DCS DS |
None None None |
Jupiter |
5.230 | 11.86y | 0.41 | 1.3 | 143800 | H2 and He | |
*Io |
422 | 1.77 | 1.77 | 3.50 | 3640 | S compounds | SO2 (thin) |
*Europa |
671 | 3.55 | 3.55 | 3.03 | 3130 | water ice | None |
*Ganymede |
1071 | 7.15 | 7.15 | 1.93 | 5280 | water ice D | None |
*Callisto |
1884 | 16.69 | 16.69 | 1.79 | 4840 | water ice D | None |
| Planetary Body |
Semi-Major Axis (AU for planets, 1000 km for satellites |
Orbital Period (Days or Years) |
Rotation Period (Days) |
Density (gm/cm3) |
Diameter (km) |
Surface Composition | Atmosphere Compositions |
Saturn |
9.54 | 29.46y | 0.43 | 0.69 | 120660 | H2 &He | |
*Mimas |
186 | 0.94 | 0.94 | 1.12 | 392 | water ice | None |
*Enceladus |
238 | 1.37 | 1.37 | 1.00 | 500 | water ice | None |
*Tethys |
295 | 1.89 | 1.89 | 1.00 | 1060 | water ice | None |
*Dione |
377 | 2.74 | 2.74 | 1.49 | 1120 | water ice | None |
*Rhea |
527 | 4.52 | 4.52 | 1.24 | 1530 | water ice | None |
*Titan |
1222 | 15.94 | 15.9 | 1.88 | 5150 | water ice C | N2 |
*Hyperion |
1484 | 21.3 | ? | ? | 250 | water ice | None |
*Iapetus |
3562 | 79.33 | 79.33 | 1.03 | 1436 | water ice DCS | None |
*Phoebe |
12930 | 550.4R | 0.4 | ? | 220 | water ice DC? | None |
| Planetary Body |
Semi-Major Axis (AU for planets, 1000 km for satellites |
Orbital Period (Days or Years) |
Rotation Period (Days) |
Density (gm/cm3) |
Diameter (km) |
Surface Composition | Atmosphere Compositions |
Uranus |
19.18 | 84.01y | 0.72 | 1.28 | 51120 | H2 and He | |
*Miranda |
130 | 1.41 | 1.41 | 1.35 | 470 | water ice | None |
*Ariel |
191 | 2.52 | 2.52 | 1.66 | 1150 | water ice | None |
*Umbriel |
266 | 4.14 | 4.14 | 1.51 | 1170 | water ice | None |
*Titania |
438 | 8.70 | 8.70 | 1.68 | 1580 | water ice | None |
*Oberon |
586 | 13.46 | 13.46 | 1.58 | 1520 | water ice | None |
Neptune |
30.37 | 164.79y | 0.73 | 1.64 | 49560 | H2 and He | |
*Triton |
355 | 5.88R | 5.88 | 2.01 | 2700 | N2 and CH4 ice | N2 and CH4 |
*Proteus |
118 | 1.12 | 1.12 | ? | 400 | D H2O ice | None |
*Nereid |
5562 | 359.9 | ? | ? | 340 | D H2O ice | None |
Pluto |
39.44 | 247.7 | 6.4 | 2.06 | 2284 | nitrogen ice | N2 |
*Charon |
17 | 6.39 | 6.4 | 2.06 | 1192 | H2O ice | None |
| Planetary Body |
Semi-Major Axis (AU for planets, 1000 km for satellites |
Orbital Period (Days or Years) |
Rotation Period (Days) |
Density (gm/cm3) |
Diameter (km) |
Surface Composition | Atmosphere Compositions |