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Questions tagged [near-earth-asteroid]

Questions about the group of asteroids within 1.3 AU of Sun (on closest approach). See also: [near-earth-object]

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28 votes
1 answer
5k views

Why not explore Cruithne?

Cruithne (3753 Cruithne) is in a near Earth orbit. Technically, a horseshoe orbit, because it orbits the sun so close to Earth's orbit that it almost, but never, passes us. When visible, which is ...
David Wilkins's user avatar
16 votes
3 answers
3k views

Can we destroy an asteroid by spinning it?

In a YouTube video Colonizing the Solar System, part 2: the Outer Solar System, Isaac Arthur who is a YouTuber and also a physicist says something like "you don't spin an asteroid for artificial ...
Nikolai Frolov's user avatar
14 votes
3 answers
699 views

Do all dangerous asteroids first pass through keyholes?

Scitech Daily's MIT Engineers Devise the Best Way to Deflect an Incoming Planet-Killer Asteroid Now MIT researchers have devised a framework for deciding which type of mission would be most ...
uhoh's user avatar
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10 votes
5 answers
4k views

Can an asteroid enter Earth orbit?

Can an asteroid pass near Earth at a right velocity and angle to bend its trajectory and make an orbit? Note: I know about objects such as 2016 HO3, which are quasi-satellites of Earth due to ...
Mark's user avatar
  • 525
9 votes
6 answers
5k views

How could 99942 Apophis, in 2029, be captured and brought into a low Earth orbit?

I'm currently attempting to plan out a mission where, in 2029, during Apophis's close approach to Earth, a rocket is sent up to intercept Apophis and decelerate it, making it orbit the Earth. At it's ...
An Axolotl's user avatar
9 votes
2 answers
2k views

Why did they think that S509356 was in orbit around the Earth? Where is the disconnect?

tl;dr: I have met the disconnect, and the disconnect is me! This answer suggests that the object S509356 could potentially be a candidate for being called a "mini-moon", an object which ...
uhoh's user avatar
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8 votes
2 answers
4k views

How feasible is a manned flight to Apophis in 2029 using Artemis or Starship?

Apophis will fly by Earth around GEO altitude in 2029. May NASA consider launching an Orion spacecraft on a (sub-)orbital trajectory whose apogee is very close to Apophis so that astronauts can study ...
Johannes's user avatar
  • 229
7 votes
1 answer
861 views

What precisely was the character of the non-gravitational acceleration of Oumuamua?

When exactly did Oumuamua accelerate, when did it begin, when did it end, was it uniform across that period, and at what vector did it occur? I've seen some vague references to it lasting 100 days, ...
Chris B. Behrens's user avatar
7 votes
1 answer
204 views

Why are low-albedo asteroids thought to be more water-rich?

In this talk, J. L. Galache mentions that asteroid miners are looking for NEAs with: low delta-v (so the asteroid is easy to get to/from from Earth) low synodic period (for frequent launch/return-...
mb21's user avatar
  • 677
6 votes
2 answers
1k views

Could the Orion project pusher plate model be used for asteroid deflection?

Could the Orion project pusher plate model be used for asteroid deflection? Basically, the plates (or hemispherical shells) would be deployed in the vicinity  of the asteroid , and the following ...
Cristian Dumitrescu's user avatar
6 votes
0 answers
218 views

What can be learned from NASA's choice of Didymos B for the Double Asteroid Redirection Test

The NASA News item NASA’S First Asteroid Deflection Mission Enters Next Design Phase describes a test the kinetic impactor technique that could someday be used to adjust the orbit of an asteroid in ...
uhoh's user avatar
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5 votes
3 answers
630 views

What is the closest asteroid to Earth worth mining?

I found this list, but it doesn't say how close it is to the ground https://echo.jpl.nasa.gov/~lance/delta_v/delta_v.rendezvous.html
Valentino Zaffrani's user avatar
4 votes
2 answers
406 views

How will OSIRIS-REx scan and characterise the near-earth asteroid Bennu?

The 34 day launch window for the OSIRIS-REx probe will open in about five weeks (early September 2016), and it's approach to the near earth asteroid 101955 Bennu (provisional designation 1999 RQ36) is ...
uhoh's user avatar
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4 votes
1 answer
200 views

How big would a collection of asteroids near the Moon's L4 point need to be to aggregate naturally into a "stepping stone" for space exploration?

Wouldn't it be useful to catch few meter sized near-Earth asteroids whenever opportunity knocks and "lock them up" at the L4 Langrangian point of our Moon ? Although at the L4 and L5 Lagrangian ...
Cornelis's user avatar
  • 7,535
4 votes
2 answers
366 views

Clohessy - Wiltshere equations in electric propulsion

Further to my "asteroid chasing" question regarding the HCW equations (Clohessy - Wiltshire equations for use in Asteroid "chasing"), I was wondering if there was some transformation of ...
Harvey Rael's user avatar
4 votes
1 answer
366 views

Has the National Near Earth Object Preparedness Strategy and Action Plan seen any action?

This answer to Does NASA have an end-of-the-world policy? mentions the National Near Earth Object Preparedness Strategy and Action Plan. Has this plan resulted in any action?
uhoh's user avatar
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4 votes
1 answer
1k views

What (actually) is a 1:1 resonance, and is 2016 HO3 in one with the Earth?

In my question How was Earth's "quasi-satellite" 2016 HO3 "first spotted" and it's orbit determined? I link to two videos of simulations of views of 2016 HO3's orbit seen in two ...
uhoh's user avatar
  • 149k
4 votes
1 answer
224 views

Stabilization of Lagrange point asteroids

There are a couple discovered asteroids that orbit around L4 or L5 Sun-Earth Lagrange points https://en.wikipedia.org/wiki/(419624)_2010_SO16 https://en.wikipedia.org/wiki/2010_TK7 From what I read ...
Leonardo Ciferri's user avatar
4 votes
2 answers
320 views

Has there ever been an instance of asteroid discovery by radar; seen first by radar rather than being observed after optical discovery?

In a discussion below this answer to Can we use something like RADAR to detect asteroids? I'm complaining that the answer is essentially wrong; Yes, radar is one of the useful tools for detecting and ...
uhoh's user avatar
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4 votes
0 answers
224 views

delta-v for a trip to Bennu asteroid

101955 Bennu has a mean diameter of 490 m (1,610 ft; 0.30 mi) and was the target of the OSIRIS-REx sample return mission. What is the delta-v using a Hohmann transfer orbit to do a round trip from low ...
Sheldon's user avatar
  • 555
3 votes
2 answers
1k views

Using Dragon and Polaris Dawn to dock with near Earth asteroids

There is a planned launch from SpaceX called Polaris Dawn; for a modified Dragon capsule, currently planned for early summer 2024, with the ability to depressurize and allow astronauts to do a space ...
estinamir's user avatar
  • 401
3 votes
1 answer
278 views

How will NEA Scout control its attitude during deep space flight & keep its camera steady without vibrations or damage to its 85 m² solar sail?

Phil Plait's Bad Astronomy's Fly Me to the Moon and Then to a Near-Earth Asteroid describes Near Earth Asteroid Scout (NEA Scout, or just Scout) a 6U cubesat that will be deployed from Artemis ...
uhoh's user avatar
  • 149k
3 votes
2 answers
161 views

Asteroid mining: will full asteroid prospecting require sending probes to each asteroid?

It is well known that many characteristics about an asteroid such as orbit, size, rotation and chemical composition can be obtained remotely thanks to passive techniques such as spectrophotometry, ...
Rexcirus's user avatar
  • 481
3 votes
0 answers
90 views

How will NEO Surveyor manage 82 gigabits/day of data? How will it process it, what fraction will be sent to Earth and how it compares to TESS & GAIA?

Wikipedia says says: NEO Surveyorformerly called Near-Earth Object Camera (NEOCam), then NEO Surveillance Mission, is a planned space-based infrared telescope designed to survey the Solar System for ...
uhoh's user avatar
  • 149k
2 votes
2 answers
110 views

Could a laser array and miniature light sails be used to deflect asteroids that are on a collision path with Earth?

Several projects related to interstellar travel have been proposed, like interstellar travel with miniature light sail starships , or the Breakthrough Starshot project Question. Could a laser array ...
Cristian Dumitrescu's user avatar
2 votes
1 answer
72 views

NEAR Shoemaker mission data

I'm thinking of designing a mission to an asteroid, to Eros, and since NASA has already done a mission to this asteroid, I was wondering if anyone knows of any site, document or whatever helps me. I ...
Valentino Zaffrani's user avatar
2 votes
1 answer
193 views

Are there any specific plans for how to deal with near-Earth comets? If not, should there be?

You hear a lot about how NASA, ESA and other space agencies are taking action to catalogue asteroids that might one day collide with us, but also figure out how to avert such a catastrophe if one day ...
Happy Koala's user avatar
2 votes
1 answer
162 views

Scenarios for asteroids 2000 QW7 and 2010 CO1 hitting the Earth?

These two NEOs have been appearing prominently in the popular news media recently: Two Gigantic Asteroids To Zip Past Earth on September 14 Two Gigantic Asteroids to Fly Past Earth on 14 September ...
coderGeek's user avatar
  • 121
2 votes
1 answer
401 views

Could we reverse gravitational slingshot a fast object to slow it down and capture it in an orbit?

I have heard of plans to capture an asteroid in an orbit around the earth, to have it close by so that we could study it more easily. Such objects can have very high velocities, (I assume) possibly ...
Speedphoenix's user avatar
  • 5,324
2 votes
1 answer
250 views

Here it comes! 2012 TC4 has been re-acquired and its orbit revised; at over 50 million km, how was this done?

This excellent and under-up-voted answer describes the calculation of the probabilities of closest approach to Earth of the NEO 2012 TC4 in October 2017. This comment noted that TC4 has recently been ...
uhoh's user avatar
  • 149k
2 votes
1 answer
149 views

Cheaply capture asteroids for mining with momentum transfer via a chain of Earth + Moon elevators (and alike), is it possible?

I get that mining asteroids seems like a very expensive task. I understand that it's expensive to get to and from them and takes lots of propellant.  But I just thought of a a way to make it way ...
Artem Shamsutdinov's user avatar
2 votes
0 answers
148 views

What size of meteoroid would be needed to wipe out humanity on Earth?

This might belong on physics.SE or astronomy.SE or not on SE at all as it's not falsifiable I believe a meteoroid caused the dinosaurs to go extinct by causing a global winter. However Earth has been ...
Vorac's user avatar
  • 499
2 votes
0 answers
173 views

Trojan Asteroids, are they Beneficial or Potentially Dangerous?

I know that Jupiter has a bunch of trailing asteroids surrounding it dubbed "Trojans". Due to its massive gravitational pull Jupiter is likely a co-creator of Earth in many ways, diverting asteroids ...
Magic Octopus Urn's user avatar
1 vote
2 answers
113 views

What is the average distance to any asteroid nearer and larger than Phobos?

How much of the time, if it happens at all, is Phobos the nearest interplanetary object of its size (r=11.3 km) to the Earth-Moon system? Are there maybe larger NEAs always lurking closer by? I can't ...
LocalFluff's user avatar
1 vote
1 answer
147 views

How did fictional asteroid 2019 PDC get its name?

Gizmodo's NASA and FEMA Will Simulate an Impending Asteroid Strike Next Week The hypothetical discovery takes place in 2019, but what does "PDC" stand for? Perhaps it is another "discovery" by the ...
uhoh's user avatar
  • 149k
1 vote
1 answer
1k views

Just how close to Earth will 2012 TC4 pass in 2017?

Last week's tweet by Ron Baalke (of JPL) mentions five near Earth asteroids that will come within five Lunar distances (5 LD) of the Earth in 2017. One of them, 2012 TC4, will pass very close to ...
uhoh's user avatar
  • 149k
1 vote
1 answer
178 views

What is the "interesting story" on the limitations of NASA's current near Earth object survey network"?

Axios' NASA emails reveal agency's surprise at asteroid's near-miss of Earth cites Buzzfeed's A “Sneaky” Asteroid Narrowly Missed Earth This Summer. Internal Emails Show How NASA Scientists Totally ...
uhoh's user avatar
  • 149k
0 votes
1 answer
71 views

Has anyone proposed a mission to catch an small asteroid?

The idea here is that you launch a platform into perhaps a medium earth orbit. That platform is equipped with a radar system and an interceptor missile. When the radar detects an asteroid of the ...
phil1008's user avatar
  • 6,288
0 votes
2 answers
380 views

Most useless artificial Earth satellite [closed]

What if some future Falcon Heavy's launch put a regular boulder in orbit around Earth (as a secondary payload)? Well, not arbitrary one that lies by the edge of the road, rather something resembling ...
ZuOverture's user avatar
0 votes
1 answer
56 views

Is 2012 TC4 part of the Near-Earth Object Human Space Flight Accessible Targets Study?

This nifty answer describes and provides links to the data of the recovery of near earth object 2012 TC4, and the answer also shows the first actual image of the body for this pass. At apparent ...
uhoh's user avatar
  • 149k
0 votes
0 answers
41 views

If I know the masses, positions, and velocities of two objects, how do I calculate their trajectories under gravity?

I was thinking about the effect of a near-miss with an asteroid upon the orbit of the earth around the Sun. My goal is to figure out a formula I could use for a visualization I'd like to build to get ...
TheEnvironmentalist's user avatar
0 votes
0 answers
49 views

What would be the best course of orbital maneuvers for soft landing an asteroid near the lunar south pole? [duplicate]

Wouldn't it be nice for a colony near the south pole of our Moon to have a nickel-iron asteroid on the surface nearby ! Thousands near-Earth asteroids (NEAs) have been discovered with a diameter up to ...
Cornelis's user avatar
  • 7,535
0 votes
0 answers
184 views

Is kinetic bombardment from NEO fragments now practical with current technonology?

Everything I know about orbital mechanics I know from Kerbal Space Program, so this may be a dumb question. Using (possibly wrong) math, it looks like that even for the lowest delta-v (to Earth) ...
PJ7's user avatar
  • 109
-5 votes
1 answer
134 views

Are there any asteroids between the Earth and the Moon which could also serve as a base

I read about this tennis court sized asteroid https://www.theguardian.com/science/2021/nov/11/near-earth-asteroid-is-a-fragment-from-the-moon-say-scientists It appears to be between the Moon & ...
safe_malloc's user avatar