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Questions tagged [near-earth-asteroid]

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5
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1answer
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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, ...
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2answers
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 temporarily ...
0
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0answers
71 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 ...
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0answers
86 views

Are there clusters of small asteroids in the Kuiper or asteroid belt which could threaten the Earth?

I watched an episode of Curious Droid talking about the types of impacts of asteroids the size of Near Earth Objects. Are there clusters of small asteroids which are gravitationally bound together (or ...
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0answers
129 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) ...
3
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2answers
157 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 ...
0
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2answers
251 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 ...
13
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2answers
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 ...
4
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1answer
109 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-...
9
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3answers
3k 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 ...
0
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1answer
39 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 ...
3
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1answer
210 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 ...
6
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0answers
156 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 ...
1
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1answer
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 ...
4
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1answer
182 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 ...
1
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2answers
65 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 ...
3
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1answer
573 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 different frames. ...