Questions tagged [near-earth-object]

Questions about Near-Earth Objects or NEO for short, a term describing meteoroids, asteroids, comets, man-made spacecraft, space observatories, and space debris whose orbit brings them into proximity with Earth. See also: [near-earth-asteroid]

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1answer
130 views

Earth Live Video Feed in HD?

Is there any space agency that provides a live video of Earth, in HD? Preferably without anything man-made in the way (e.g some ISS robotic arm)? I want to create a live HD wallpaper of Earth, so I'm ...
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1answer
274 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 ...
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How do we know what percentage of NEOs we've discovered?

I stumbled upon this answer: https://space.stackexchange.com/a/41535/10334 It states the percentage of NEOs we have already discovered. Seeing this I've asked myself: How do we know what percentage ...
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Are the estimated chances of Bennu hitting Earth in the next 200 years still about “1 in 1410” now that OSIRIS REx has scanned it?

This 2016 answer to Does Bennu pose a risk to Earth? And how can OSIRIS-REx's mission save us? says: Does Bennu pose a risk to Earth?: recent calculations produced a cumulative probability of 1 in ...
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1answer
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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 ...
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1answer
40 views

What are monostatic radar observations, and how will Deep Space Network's DSS-13 be used to observe asteroid 1999 WK4's flyby of Earth?

NASA JPL page https://echo.jpl.nasa.gov/asteroids/1999KW4/1999KW4_planning.2019.html says of the radar observations during the close approach of asteroid 1994 KW4 (in part): Update on 2019 May 22: A ...
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0answers
160 views

Separating fact from fiction, how to get from this radar image to this GIF?

The NBC News article Mile-wide asteroid and its tiny moon to zoom past Earth this weekend; Dubbed 1999 KW4, the "binary" space rock will skim past our planet harmlessly at a distance of 3 million ...
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1answer
71 views

How will the “fleet of small asteroid hunters” proposed by the B612 Foundation & York Space Systems work?

The June 2018 news item in Science To find small asteroids that could hit Earth, private foundation embraces small satellites says: On 10 May, B612 announced a partnership with York Space Systems, a ...
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2answers
401 views

Could Starman get ejected from the Solar System?

This is not about a prediction of Starman's fate, although it might be interesting to find it so. This is about any object having similar aphelion and perihelion values to Starman (Elon Musk's Tesla ...
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1answer
298 views

Yikes! How did we miss 2017 VL2?

The Tech Times article NASA Fails To Spot Whale-Sized Asteroid That Skimmed Past Earth says that Asteroid 2017 VL2 passed the Earth within about 120,000 km, or about 1/3 the distance of the Moon on ...
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118 views

Calculate NEO object position with nasa Near Earth Object data

I am using the nasa NEO object data: Listing Of NEO's: Nasa NEO Data Specific NEO Data: Object Data Given the information in this JSON data. Is it possible to calculate the position of the NEO in ...
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1answer
234 views

Why has the Earth-Sun libration point L1 been chosen over L2 for NEOCam to detect new NEOs?

above: Profoundly not-to-scale illustration of NEOCam in an orbit around the Sun-Earth libration point L1, about 1.5 million kilometers from Earth. Presumably Sun-shield and Earth-shield block light (...
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1answer
210 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 ...
4
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1answer
219 views

Why do (did) they think WT1190F is low density?

A piece of space debris WT1190F is in the news in part because it has been far from earth (farther than lunar distance) in the past but will should have already re-enter earth's atmosphere in a few ...
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1answer
814 views

Have there been any documented mini-moons since 2006 RH120?

The conference call with Bill Bottke (MP3 plus other documents) about "minimoons" presents an alternative to Asteroid Redirect first got me interested in orbital mechanics. The idea is that there are ...
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3answers
500 views

Asteroid 2013 TX68 March 5, 2016 close approach, and calculating with Skyfield

This NASA webpage describes the close approach of asteroid 2013 TX68 on March 5, 2016 and shows a probability distribution of the point of closest approach based on the only data available at this ...
6
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3answers
1k views

Mining a near-Earth passing asteroid with profit?

The answer by PearsonArtPhoto in this question got me thinking, particularly this line: Asteroids would be cheaper to go to than the Moon I suppose the subject here are asteroids that pass in the ...
5
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1answer
406 views

Understanding gravitational keyhole analysis for Near-Earth Objects

I've been studying the resonant return and gravitational keyhole analysis for NEOs and using the extension of Öpik's theory of close encounters (aka Öpik-Valsecchi theory, Valsecchi et al., Astron ...
6
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1answer
127 views

Are NMAs (Near Mars Asteroids) common and useful for exploration?

Thousands of NEAs have been observed out of estimated 285,000 larger than 40 meters. A handful of Martian trojans have been found, but should there be more or fewer NMAs than NEAs? NEAs can become ...
5
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2answers
873 views

Extinction asteroid (10-100 km) impact avoidance

With the present "state-of-the-art" of space technology what is possible to do to avoid an Earth impact by rocky bodies 10 km to 100 km in diameter? Is there any international project to develop a ...
5
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3answers
782 views

Does the Earth have any Trojan asteroids?

Are there any known Trojan objects residing in the Sun-Earth L4 (SEL4) and L5 (SEL5) Lagrange points, also named "Greek" and "Trojan" groups, respectively?
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712 views

Why does NASA plan to put a meteoroid in Lunar orbit instead of Earth orbit?

NASA is working on an asteroid retrieval mission. A small asteroid will be moved into Lunar orbit where it will be visited by space walking astronauts. Since it will be only max seven meters in ...