|
Size: 2141
Comment:
|
Size: 2144
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 17: | Line 17: |
| || || 100 || degrees from perigee, close approach earth orbit angle || | || || 100 || degrees from perihelion, close approach earth orbit angle || |
Intercepting Bennu
101955 Bennu is a 500 meter diameter Near Earth Asteroid, likely to crash into the Earth sometime in the next 20,000 years, and possibly sooner than 200 years from now. The impact energy would be equivalent to a 100 megaton bomb, or 4 times the explosive energy of the Mount Saint Helens eruption. That won't be a global catastrophe, but it could kill millions of people if it impacted in the wrong place.
Bennu is an Apollo asteroid, with a semimajor axis of
Earth |
Bennu |
|
|
7.00E+10 |
kg Mass |
1 |
1.1264 |
AU Semimajor axis |
149597900 |
168507075 |
km Semimajor axis |
1 |
1.1954 |
year Period |
365.2422 |
436.64 |
day Period |
0.0167086 |
0.20375 |
Eccentricity |
29.790 |
28.666 |
km/s v0 |
1.0167 |
1.3559 |
AU aphelion |
0.9833 |
0.8969 |
AU perihelion |
|
100 |
degrees from perihelion, close approach earth orbit angle |
1.00290 |
1.00290 |
AU Close approach radius |
|
1.07651 |
1+ecos() |
1.7453 |
1.1858 |
radians at close approach |
29.703 |
30.860 |
km/s tangential velocity |
0.490 |
5.413 |
km/s radial velocity |
|
||
|
-1.156 |
km/s tangential difference |
|
-4.923 |
km/s radial difference |
|
13.215 |
degrees velocity angle from radial |
|
5.057 |
km/s total relative velocity |
11.180 |
|
km/s Earth escape velocity |
12.271 |
|
km/s Earth impact velocity |
|
4.29E+17 |
Joules impact kinetic energy |
|
4.18E+15 |
Joules per megatonne TNT |
|
103 |
MT TNT equivalent |