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Size: 1887
Comment:
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← Revision 23 as of 2021-02-05 01:12:32 ⇥
Size: 1990
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 13: | Line 13: |
| ||<-5 > <<BR>> || | ||<-5 > <<BR>> || |
| Line 15: | Line 15: |
| || Asteroids || SemiM AU || Years || km/s || km/s || surface || ||<-5:> circular approximation || || Earth || 1.0 || 1.0 || 29.79 || 11.2 || N₂ O₂ || |
|| Asteroids || SemiM AU || Years || km/s || km/s || surface || ||<-6:> circular approximation || || Earth || 1.0 || 1.0 || 29.79 || 11.2 || N₂ O₂ || |
| Line 19: | Line 19: |
| || Vesta || 2.362 || 3.630 || 19.34 || 0.36 || dust || | || 4 Vesta || 2.362 || 3.630 || 19.34 || 0.36 || dust || |
| Line 24: | Line 24: |
| ||<-5:> Satellites || || || SemiM km || 24h d || km/s || km/s || |
||<-6:> Satellites || || || SemiM km || 24h d || km/s || km/s || || |
| Line 30: | Line 30: |
=== Hohmann Matrix === Earth Deimos Vesta Titan Iapetus |
Extracting Materials from Titan
Titan is (im)practically inaccessible. High delta V to get there and come back. Long round travel times.
Humans and their machines may someday occupy the asteroid belt between Mars and Jupiter. Titan's nitrogen atmosphere is a candidate source of reaction mass for thermal rockets, but Titan is a long way from Earth, and longer way (in travel time and Hohmann semimajor axis) from the asteroid belts.
Some numbers:
Earth year |
3.1557e7 seconds |
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Solar Gravitational Constant |
1.3271e20 m³/s² |
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Astronomical Unit |
1.496e11 meters |
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Planets & |
Orbit |
Period |
Velocity |
Escape |
outer |
Asteroids |
SemiM AU |
Years |
km/s |
km/s |
surface |
circular approximation |
|||||
Earth |
1.0 |
1.0 |
29.79 |
11.2 |
N₂ O₂ |
Mars |
1.524 |
1.881 |
24.13 |
5.03 |
CO₂ |
4 Vesta |
2.362 |
3.630 |
19.34 |
0.36 |
dust |
1 Ceres |
2.769 |
4.608 |
17.91 |
0.51 |
dust |
10 Hygiea |
3.142 |
5.568 |
16.76 |
0.21 |
dust |
Jupiter |
5.204 |
11.86 |
13.07 |
59.5 |
H₂ He |
Saturn |
9.583 |
29.46 |
9.68 |
35.5 |
H₂ He |
Satellites |
|||||
|
SemiM km |
24h d |
km/s |
km/s |
|
Moon |
384400 |
27.322 |
1.02 |
2.376 |
dust |
Deimos |
23463 |
1.263 |
1.35 |
0.006 |
dust |
Titan |
1221870 |
15.945 |
5.57 |
2.639 |
N₂ |
Iapetus |
3560820 |
79.322 |
3.26 |
0.571 |
H₂O ice |
Hohmann Matrix
Earth Deimos Vesta Titan Iapetus