Questions tagged [flyby]

Questions regarding flyby in which the spacecraft flies near celestial object in a hyperbolic path for scientific explorations. Such flybies may also be made to increase velocity or reduce the velocity via a gravitational assist.

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Should a Europa clipper use a retrograde orbit?

A "clipper", as I understand it, is orbiting a planet to repeatedly flyby one of its moons. Mariner 10 orbited the Sun to fly by Mercury 3 times. Should clippers in general use retrograde orbits in ...
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How to calculate the maximum heliocentric speed during a flyby?

The following graphs are related to the Voyager 2 / Jupiter flyby occurred on July 1979 (I did the calculation with the SPICE library and NAIF’s data files). We see that the maximum speed relative to ...
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History of the planetary flyby for gravitational assist; first conception, mathematical demonstration, plan, and execution?

Planetary flybys for gravitational assists are a stable of deep space missions. When did the following things happen? First documented realization that gravitational assists in spaceflight were ...
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How close to a planet can a flyby manoeuvre realistically take place before air resistance becomes a problem?

How close could a probe fly past a planet before forces such as air resistance make it impossible for the probe to escape the pull of its gravity? Obviously there will be different answers for ...
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186 views

How close to the moon would a flyby trip likely attempt?

For a flyby of the moon, like the SpaceX #dearMoon flight announced September 17, 2018, how close would they likely attempt to pass? Is there an average or optimal trajectory for a lunar flyby used ...
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1answer
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What are these mysterious white star-like dots near MU69 Ultima Thule? Real objects near the asteroid, noise, cosmic rays, or something else?

NOTE: I think either possibility suggested below is possible, I'm not looking for arguments why one of them would be your favorite like this answer. Instead, I'm looking for a fairly conclusive answer;...
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272 views

How can one spacecraft (MANTIS) fly by multiple (7) asteroids?

MANTIS was in 2015 a proposed Discovery class mission which were to fly by seven different asteroids including at least one NEA. I think the spacecraft which holds the record in number of flyby's is ...
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1answer
125 views

Orbit transfer trajectory options to the moon

I am working on a project for a lunar flyby using a CubeSat. I was wondering what kind of trajectory transfer options are present and which one would be best for a CubeSat? I'm aiming for a transfer ...
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231 views

Limitations of gravitational assist flybys

My understanding is that it's easier to send something out of the solar system than into the sun due to the need to overcome the speed at which the earth moves around the sun. My understanding of ...
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What Jovian system science targets would be suitable for Jupiter gravity assist flyby missions with other primary purposes?

Flying by Jupiter for gravity assist, and with the Oberth effect bonus, has been used for multiple missions to other outer planets and to comets. And has potential for use even for missions aiming at ...
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221 views

Is there a way to get the angle of approach of a spacecraft with respect to a planet velocity vector?

I apologize if my question is badly formulated I know it's really specific but here what I would like to know : I managed to compute the turning angle of the velocity for a body along a hyperbola ...
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How many asteroids could a retrograde probe in the Asteroid Belt flyby?

Cassini makes frequent flyby's of moons at Saturn. If one similarly put a probe in retrograde heliocentric orbit in the Asteroid Belt, how frequent could one expect to make a near flyby, given the ...

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