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### Aborting a de-orbit maneuver

I was contemplating on how a de-orbit may be abandoned post completion of the orbit burn, say, from LEO. A situation in which this might be necessary would be detecting a breach in the heat shield ...
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### Orbit stability

This is my first question. I am a space enthusiast but I don't have a formal understanding of celestial mechanics, so I would like to ask how stable against perturbation an orbit is, given the ...
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### Is getting IN or OUT of orbit easier for the Space Shuttle? [closed]

Here is a brief dramatic of the Space Shuttle launch and reentry: Launch : You get on this plane like thing that is strapped to an orange fuel tank that looks more like a huge bomb. The fuel tank is ...
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### Deriving the changes in Keplerian Elements induced by small impulses

I'm trying to make derive a concise table of the effects on each Keplerian orbital element for a small impulse in the Radial, Tangential, or Perpendicular direction at periapsis or apoapsis, good to ...
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### Soyuz/spacecraft deceleration speed for reentry

I recently saw a program by Prof. Brian Cox (Human Universe Ep.1) where he mentioned that just by using two equations - f=ma and the universal law of gravitation, you could calculate how much a ...
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### Commencing atmospheric re-entry

Once a decision is taken to get back home (earth), a spacecraft, I think has two options: 1 - To reduce its speed (by firing the thrusters located in the forward or something similar), so that it is ...
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### How did the Space Shuttle keep its cryogenic fuel cold?

As I understand it, the Space Shuttle used cryogenic fuel in its main engines and it kept a supply onboard for the duration of its mission for a deorbit burn. Since Space Shuttle missions often lasted ...
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### What happens to orbit after a radial burn?

We know from Hohmann or bi-elliptic transfer maneuvers that a burn in the tangential direction of an orbit changes the radius of the orbit. But what happens to an object in orbit, when there is a burn ...
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### After a spacecraft departing from the ISS has performed its deorbit burn, what is the altitude at the perigee of its elliptical orbit typically?

I am attempting to quantify how aggressively returning spacecraft reenter the atmosphere. There is likely a trade-off between aerobraking more gradually and splashing down accurately. I'm hoping that ...
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### What is the fuel cost of deorbiting a kilo of space junk?

Removing debris from LEO requires a significant delta-V which most schemes propose to accomplish via rocket propulsion. Source The ratio of launch fuel to payload mass is often given as 9:1 for LOE. ...
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### What if GOCE rolled 90°?

Reading this question: Is GOCE a satellite or aircraft? I wondered what would happen if GOCE rolled 90° in either direction, so that it's solar panels become parallel to Earth's horizon, and then ...
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### How large a percentage of its fuel did the Space Shuttle use to get to orbit?

What percent of the total available fuel onboard the space shuttle, external tank, and rocket boosters was required to launch and get the space shuttle into orbit? Or phrased another way, what percent ...
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### In Crew Dragon do the astronauts feel like flying upside-down?

When looking at Crew Dragon flight paths diagrams I saw that for phasing burns and deorbit burns they don't use the side thrusters, as I would expect, but four thrusters mounted at the "top" ...
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### What was the typical perigee after a shuttle de-orbit burn? [duplicate]

What was the typical1 (theoretical) perigee after a shuttle de-orbit burn? I say 'theoretical' given that presumably the orbiter would already have undergone further deceleration before it reaches ...
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