What is the closest fly-by of a planet/moon ever completed?
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I was thinking that on a fly-by of the moon, due to a lack of atmosphere, you could get really close! Of course, in practice this isnt a very good idea- going 1000m/s 50 meters above ground wouldn't allow for all that much more science and would allow for tons more risk. That being said, what is the closest fly-by ever completed and by what spacecraft? This can include captures, but should only consider the initial perigee of the trajectory before capture burns. For planets without atmosphere the height should be from the surface. For planets with atmosphere the height should be from the karman line of that body (or the surface- whichever makes more sense given the scenario Im assuming no flyby ever intends to dip below the atmosphere of a planet at hyperbolic speeds aside from aerocaptures- which would count).
flyby
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up vote
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I was thinking that on a fly-by of the moon, due to a lack of atmosphere, you could get really close! Of course, in practice this isnt a very good idea- going 1000m/s 50 meters above ground wouldn't allow for all that much more science and would allow for tons more risk. That being said, what is the closest fly-by ever completed and by what spacecraft? This can include captures, but should only consider the initial perigee of the trajectory before capture burns. For planets without atmosphere the height should be from the surface. For planets with atmosphere the height should be from the karman line of that body (or the surface- whichever makes more sense given the scenario Im assuming no flyby ever intends to dip below the atmosphere of a planet at hyperbolic speeds aside from aerocaptures- which would count).
flyby
Do you allow asteroids, etc?
â PearsonArtPhotoâ¦
7 hours ago
@PearsonArtPhoto I mean, why not to be honest, I'm sure your comment has piqued the interest of some (myself included).
â Magic Octopus Urn
49 mins ago
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up vote
3
down vote
favorite
up vote
3
down vote
favorite
I was thinking that on a fly-by of the moon, due to a lack of atmosphere, you could get really close! Of course, in practice this isnt a very good idea- going 1000m/s 50 meters above ground wouldn't allow for all that much more science and would allow for tons more risk. That being said, what is the closest fly-by ever completed and by what spacecraft? This can include captures, but should only consider the initial perigee of the trajectory before capture burns. For planets without atmosphere the height should be from the surface. For planets with atmosphere the height should be from the karman line of that body (or the surface- whichever makes more sense given the scenario Im assuming no flyby ever intends to dip below the atmosphere of a planet at hyperbolic speeds aside from aerocaptures- which would count).
flyby
I was thinking that on a fly-by of the moon, due to a lack of atmosphere, you could get really close! Of course, in practice this isnt a very good idea- going 1000m/s 50 meters above ground wouldn't allow for all that much more science and would allow for tons more risk. That being said, what is the closest fly-by ever completed and by what spacecraft? This can include captures, but should only consider the initial perigee of the trajectory before capture burns. For planets without atmosphere the height should be from the surface. For planets with atmosphere the height should be from the karman line of that body (or the surface- whichever makes more sense given the scenario Im assuming no flyby ever intends to dip below the atmosphere of a planet at hyperbolic speeds aside from aerocaptures- which would count).
flyby
flyby
asked 7 hours ago
Magic Octopus Urn
1,6791934
1,6791934
Do you allow asteroids, etc?
â PearsonArtPhotoâ¦
7 hours ago
@PearsonArtPhoto I mean, why not to be honest, I'm sure your comment has piqued the interest of some (myself included).
â Magic Octopus Urn
49 mins ago
add a comment |Â
Do you allow asteroids, etc?
â PearsonArtPhotoâ¦
7 hours ago
@PearsonArtPhoto I mean, why not to be honest, I'm sure your comment has piqued the interest of some (myself included).
â Magic Octopus Urn
49 mins ago
Do you allow asteroids, etc?
â PearsonArtPhotoâ¦
7 hours ago
Do you allow asteroids, etc?
â PearsonArtPhotoâ¦
7 hours ago
@PearsonArtPhoto I mean, why not to be honest, I'm sure your comment has piqued the interest of some (myself included).
â Magic Octopus Urn
49 mins ago
@PearsonArtPhoto I mean, why not to be honest, I'm sure your comment has piqued the interest of some (myself included).
â Magic Octopus Urn
49 mins ago
add a comment |Â
1 Answer
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Here's a list of what the closest flybys that I have found of several objects. For Cassini and Galileo, I took the closest approaches they had to any object, pre-impact.
- Earth: Galileo- 301 km
- Moon- Apollo 13- 254 km
- Mars- Rosetta- 250 km
- Mercury- Messenger- 200 km
- Amalthea- Galileo- 160 km
- Enceladus- Cassini- 25 km
I guess the gas giant moons were selected because a significant amount of time was present to get a good orbital trajectory, and the orbits are relatively short. It could be known with precision where the spacecraft would be. With, say Pluto, the knowledge of where it is is only to within a thousand kilometers or so, so some margin for error is required!
I hadn't thought of non-manmade objects. Also Cassini got THAT close? I hadn't known. Amazing.
â Magic Octopus Urn
46 mins ago
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
4
down vote
Here's a list of what the closest flybys that I have found of several objects. For Cassini and Galileo, I took the closest approaches they had to any object, pre-impact.
- Earth: Galileo- 301 km
- Moon- Apollo 13- 254 km
- Mars- Rosetta- 250 km
- Mercury- Messenger- 200 km
- Amalthea- Galileo- 160 km
- Enceladus- Cassini- 25 km
I guess the gas giant moons were selected because a significant amount of time was present to get a good orbital trajectory, and the orbits are relatively short. It could be known with precision where the spacecraft would be. With, say Pluto, the knowledge of where it is is only to within a thousand kilometers or so, so some margin for error is required!
I hadn't thought of non-manmade objects. Also Cassini got THAT close? I hadn't known. Amazing.
â Magic Octopus Urn
46 mins ago
add a comment |Â
up vote
4
down vote
Here's a list of what the closest flybys that I have found of several objects. For Cassini and Galileo, I took the closest approaches they had to any object, pre-impact.
- Earth: Galileo- 301 km
- Moon- Apollo 13- 254 km
- Mars- Rosetta- 250 km
- Mercury- Messenger- 200 km
- Amalthea- Galileo- 160 km
- Enceladus- Cassini- 25 km
I guess the gas giant moons were selected because a significant amount of time was present to get a good orbital trajectory, and the orbits are relatively short. It could be known with precision where the spacecraft would be. With, say Pluto, the knowledge of where it is is only to within a thousand kilometers or so, so some margin for error is required!
I hadn't thought of non-manmade objects. Also Cassini got THAT close? I hadn't known. Amazing.
â Magic Octopus Urn
46 mins ago
add a comment |Â
up vote
4
down vote
up vote
4
down vote
Here's a list of what the closest flybys that I have found of several objects. For Cassini and Galileo, I took the closest approaches they had to any object, pre-impact.
- Earth: Galileo- 301 km
- Moon- Apollo 13- 254 km
- Mars- Rosetta- 250 km
- Mercury- Messenger- 200 km
- Amalthea- Galileo- 160 km
- Enceladus- Cassini- 25 km
I guess the gas giant moons were selected because a significant amount of time was present to get a good orbital trajectory, and the orbits are relatively short. It could be known with precision where the spacecraft would be. With, say Pluto, the knowledge of where it is is only to within a thousand kilometers or so, so some margin for error is required!
Here's a list of what the closest flybys that I have found of several objects. For Cassini and Galileo, I took the closest approaches they had to any object, pre-impact.
- Earth: Galileo- 301 km
- Moon- Apollo 13- 254 km
- Mars- Rosetta- 250 km
- Mercury- Messenger- 200 km
- Amalthea- Galileo- 160 km
- Enceladus- Cassini- 25 km
I guess the gas giant moons were selected because a significant amount of time was present to get a good orbital trajectory, and the orbits are relatively short. It could be known with precision where the spacecraft would be. With, say Pluto, the knowledge of where it is is only to within a thousand kilometers or so, so some margin for error is required!
edited 2 hours ago
answered 6 hours ago
PearsonArtPhotoâ¦
77.6k16217423
77.6k16217423
I hadn't thought of non-manmade objects. Also Cassini got THAT close? I hadn't known. Amazing.
â Magic Octopus Urn
46 mins ago
add a comment |Â
I hadn't thought of non-manmade objects. Also Cassini got THAT close? I hadn't known. Amazing.
â Magic Octopus Urn
46 mins ago
I hadn't thought of non-manmade objects. Also Cassini got THAT close? I hadn't known. Amazing.
â Magic Octopus Urn
46 mins ago
I hadn't thought of non-manmade objects. Also Cassini got THAT close? I hadn't known. Amazing.
â Magic Octopus Urn
46 mins ago
add a comment |Â
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Do you allow asteroids, etc?
â PearsonArtPhotoâ¦
7 hours ago
@PearsonArtPhoto I mean, why not to be honest, I'm sure your comment has piqued the interest of some (myself included).
â Magic Octopus Urn
49 mins ago