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Questions tagged [collision-avoidance]

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What prevents all these man-made objects flying in space from colliding with each other?

Does NASA know the location of every object in orbit and they calculate satellite and shuttle launches around not hitting these objects or are they just rolling the dice that the probability of ...
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3answers
112 views

Feasible way to detect masses without natural light in deep space?

While I was perusing the entries here on energy sources for interstellar travel, it occurred to me that a problem accompanying a low energy density in space distant from stars is darkness. Is there a ...
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1answer
121 views

How to determine an orbit of a satellite for a collision detection?

I'm trying to validate an collision detector , and for that I'm starting from a pair of initial conditions for a satellite.After that I will use an RK method to integrate . How can I determine a pair ...
10
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1answer
418 views

Whats the protocol if two satellites collide?

If two satellites from two different nations were to collide together due to poor planning on the behalf of one of the nations what would be the protocol? For instance, Russia launches a probe into ...
3
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1answer
420 views

Will the Tesla Roadster/Falcon 9H 2nd stage ever be a navigation hazard to cis-lunar space?

The saying "What goes around, comes around" can apply to spacecraft on ballistic trajectories that are launched from Earth into bound heliocentric orbits. Since the Tesla Roadster/Falcon 9H 2nd stage'...
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1answer
170 views

How predictable is one asteroid's trajectory?

If one fictitious probe mission was to impact an asteroid fast enough to destroy it using its kinetic energy, could the asteroid's trajectory be predicted accurately enough (plumes or emanations or ...
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0answers
236 views

How might one approach using AI (convolutional neural network) to predict collisions in orbit?

CNN's Tomorrow's Hero profile Meet Amber Yang. She's trying to prevent a space debris catastrophe describes an investigation into the use of a convolutional neural network (CNN) to predict possible ...
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393 views

ISS - Tiangong 2 minimum safe distance

Using the SGP4 propagator, I calculated the minimum distance between ISS and Tiangong-2 for this year. I obtained 12.32 km for 2017-09-27 17:29:36.376 UTC (which is the day 270.7289). I used the TLE ...
5
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3answers
292 views

Could we prevent a disaster if someone tried to send a rocket in retrograde GEO?

Let's say an evil dictator decide to deliver a payload to a retrograde "GEO" orbit. I suspect the first inevitable collision would quickly produce a Kessler syndrome. Is there anything that would ...
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2answers
217 views

How much can static cling be used to move things in space? Tractor Beam

Can static cling occurs in space? Can a static charge be amplified laterally to move objects in space similar to Star Trek's tractor beam? Can a static charge could be carried by a sustained particle ...
6
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1answer
359 views

Which two satellites had a 44% probability of collision at 2017-01-07 21:53 UTC?

I saw this message on space-track.org: The JSpOC has identified a close approach between two non-maneuverable satellites in a sun-synchronous orbit (approximately 800km altitude) with a time of ...
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3answers
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Is 75 meters an exceptionally close distance for two satellites to pass at >6,000 m/s?

While researching for this question I ran across something called Celestrak Socrates. I requested the ten closest predicted approaches, and saw distances of closest approach of the order of 100 ...
5
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1answer
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Is 45 km unusually close to pass the ISS and deploy a microsatellite without warning?

Eight years ago, on September 27, 2008, the Shenzhou-7 carying three taikonauts deployed the microsatellite Banxing-1 for testing maneuvers and external imaging. A few hours later at 15:07 UTC the ...
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2answers
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Are most Earth polar satellites launched to the South or to the North? And why?

Almost all satellites in LEO have been launched to the east, to take advantage of the Earth's surface rotational speed of about 5% of required orbital speed (Israel being a small exception for ...
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0answers
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Why are space probes and satellites not destroyed by meteor showers such as the Perseid?

What are the mechanisms used to avoid destruction of space probes and satellites during meteor showers? Are they affected by them?
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2answers
148 views

What actions are performed to prevent i.e. ISS from getting hit by space junk? [duplicate]

When thinking about velocity I could imagine that the ISS getting hit by some space junk (let it be just a plate of 1 meter in span) with a velocity of some 100 meters per second could be quite fatal. ...
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3answers
394 views

How would an interstellar probe navigate the pull of gravity from stars and other large objects on the way?

Refer to the ambitious probe sent by Yuri Milner, Stephen Hawking and Mark Zuckerberg to Alpha Centauri: Yuri Milner is spending $100 million on a probe that could travel to Alpha Centauri within ...
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2answers
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How does a spacecraft such as Soyuz detect when it's on collision course with an object?

Today Roscosmos reported (in Russian, here's a machine translation into English) that the Soyuz vehicle on its way to the ISS avoided collision with a piece of Japanese rocket body, allegedly launched ...
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Is there any active collision avoidance aboard the spacecraft in Mars' orbit?

Wikipedia writes to say As of 2009, about 19,000 pieces of debris larger than 5 cm (2.0 in) are tracked,[1] with another 300,000 pieces smaller than 1 cm below 200 km altitude Control collision ...
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2answers
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What is the possibility of Voyager 1/2 colliding with matter (Asteroids or planetoids) present in space?

It gives me great pleasure to hear about the feat that Voyager 1 achieved. I was wondering if Voyager 1/2 could collide with Asteroids (those,if present, outside our solar system) or any other matter ...
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3answers
604 views

How is space assigned for satellites that follow intersecting orbits?

Assigning slots to different satellites in various polar orbits seems very difficult on account of them passing over the North Pole. This loose intersection seems like the place where mission errors ...
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1answer
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How do spacecraft navigate through the Asteroid belt to avoid collision?

Have any spacecraft been lost transitioning between Mars and Jupiter? How do spacecraft navigate that field unscathed as well?
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1answer
257 views

How does Curiosity find its own way to selected destination?

What kind of technique does the Curiosity rover employ to find the safest (probably not the fastest) way to its destination that was given to it by NASA from the Earth?
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1answer
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How dense are Saturn's rings?

How high is the density of asteroids in the rings of Saturn? Would it be possible for a spacecraft to fly through the thicker rings without colliding with asteroids? Would it be necessary to avoid a ...