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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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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
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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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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
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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
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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
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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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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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
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
321 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
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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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
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
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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
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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
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0 votes
1 answer
75 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
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