Questions tagged [asteroids]

Questions regarding relatively small rocky bodies in an orbit around the Sun.

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4
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3answers
299 views

What would you find within a void?

I'm aware that voids are relatively empty regions of the universe, but just how empty can they be? Wikipedia states that voids have 'few or no' galaxies, but I can't find much else. To make my ...
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1answer
63 views

How to check what telescopes were looking at a certain portion of sky at a particular time?

I have some data that I collected from observations at a specific RA, DEC and I am trying to figure out what telescope surveys were looking at that portion of the sky at that particular time? I am ...
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1answer
64 views

How can we be certain that Ryugu is a remnant of the material that did not form planets?

As mentioned here, that Ryugu is a part of the Solar System material that did not get swept into forming a planet. But how can we be sure that it was not created later for example by an asteroid ...
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0answers
64 views

A quantitive estimate of the size above which celestial bodies must be near-spherical [duplicate]

Asteroids and smaller celestial objects tend to be odd-shaped, whereas planets are always spherical (or slightly oblate due to their spin). The reason obviously is that for sufficiently large masses/...
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1answer
2k views

What would happen if asteroid 99942 Apophis collides with the earth?

In the news recently it's been said that in 2029 the asteroid called Apophis, aka 'The God of Chaos', will fly by very close to earth. To quote Geek.com In 2029, a massive asteroid called 99942 ...
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4answers
692 views

Why do planets tend to rotate in the same direction although they have formed from tumbling asteroids?

The axial tilts of asteroids seem to vary randomly (let me know if this premise is wrong), while the planets have a strong tendency to rotate in the same way. If planets were formed by colliding ...
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1answer
5k views

What was that Asteroid/Comet in the 90s?

I am now in my mid 20s and I remember when I was 6-10 years old, there was a comet or asteroid that flew really close to earth. I remember being able to see the object very clearly as if it were the ...
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3answers
482 views

Asteroid locations at the time of the crucifixion of Jesus

I am interested in learning the locations and velocities of the near earth asteroids at the time of the crucifixion of Jesus Christ. I would like to back-calculate the paths of all known near earth ...
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3answers
135 views

Does any asteroid we have ever seen have a hot core like earth.?

I was wondering if any of the asteroids we have ever seen has a hot core like Earth's. I'm thinking that Earth has a strong gravitational field and so formation would have involved a lot of ...
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2answers
596 views

Has NASA confirmed earth now has a second moon orbiting the planet?

Several sites claim NASA has confirmed a second moon orbiting earth. This is the Asteroid 2016 HO3. One source states The newfound quasi-satellite/moon-2016 HO3, is likely larger than 120 feet (40 m) ...
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1answer
50 views

At what annual rate are new exoplanets being recognized? How does it compare to new asteroids?

I just read the BBC News article Exoplanet tally set to pass 4,000 mark . It makes me wonder about the annual rate that new exoplanets being recognized, and how it compares to the rate of new ...
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1answer
123 views

What is the closest an asteroid or comet has passed the Sun and survived?

After SOHO began watching the Sun from space with its coronagraphs 24/7 it was discovered that there are comets passing very close to the Sun quite regularly, and while some are destroyed, some are ...
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1answer
169 views

What's the soonest Oumuamua could return? [closed]

Oumuamua is apparently a cigar-shaped asteroid that recently passed through the solar system on an unusual orbit, exhibiting unexpected acceleration. Oumuamua is known to have fairly minimal powers ...
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1answer
100 views

Can the Sun pull an iron asteriods in it's orbit into it? [closed]

Can our Sun's magnetic field strengthen in any way in a short period? Can the Sun pull anything trapped in close orbit around it? What would happen if an object in orbit passes over a sunspot for ...
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3answers
202 views

Do interstellar asteroids decelerate and eventually stop?

I do wonder, do interstellar asteroids eventually stop at one point in space after they gradually decelerate (or) even do they decelerate? Though there is no air like on earth and thus asteroids ...
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2answers
2k views

If an asteroid twice the size of Earth passed super close would half of the Earth be pulled towards it?

So let's say that an asteroid the twice the size of Earth passed by going relatively slow say in between the Moon and Earth. Among so many other things (and perhaps you can touch on some of the ...
10
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1answer
181 views

Why haven't more captured small moons been found?

Shouldn't captured moons have the same size distribution as asteroids? And asteroids are more common the smaller size they are. Moons are likely captured if they are in highly inclined orbits, and ...
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1answer
97 views

What is so special about the Ultima Thule passed by New Horizon spacecraft?

I read that the New Horizon spacecraft passed by the Ultima Thule. I also got to know that it is a flat, snowman-shaped rock. What is so special about it?
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0answers
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Asteroid identification in fits image

I have a fits image, and I need to identify an asteroid. What characteristics do I look out for?
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1answer
85 views

Rendering asteroid orientation as seen from Earth

I am writing a program to render an asteroid as seen from various parts of the solar system. My goal is to roughly reproduce the image of Cacus according to information on its DAMIT detail page. ...
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1answer
58 views

Does the KBO 2014-MU69 have two numbers and entries in asteroid databases? How did it get promoted to Major Body designation?

In this answer I show that the (now pretty famous) Kuiper Belt Object 2014-MU69 has two entries in JPL's ephemeris generating Horizons site; Major Body ...
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1answer
177 views

Transform asteroid rotation to heliocentric ecliptic coordinates

I'm working with data from the DAMIT database of asteroid shape models. I'm adding them to a visualization in which the sun is at [0, 0, 0] and the X, Y axes constitute the ecliptic plane of the ...
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1answer
141 views

Could stellar occultations be used to survey Kuiper belt objects?

The first hint we had as to the shape of Ultima Thule was via an occultation study using an array of small telescopes. Has anyone investigated the feasibility and effectiveness of conducting a survey ...
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2answers
108 views

What would it take to capture a passing asteroid or other celestial body into Earth's orbit?

Every once in a while, we have a celestial body that passes through our solar system. What would be needed to reel one of these in? Not crashing down to Earth, that would be bad, but say into a high ...
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2answers
264 views

How do they know how far out Farout is? (2018 VG18)

The Carnegie Science article Discovered: The Most-Distant Solar System Object Ever Observed begins: Washington, DC— A team of astronomers has discovered the most-distant body ever observed in our ...
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1answer
148 views

How did Biden become VP? (naming of 2012 VP113)

The Carnegie Science article Solar System's Edge Redefined describes the discovery of the object 2012 VP113. Wikipedia's article 2012 VP113 says: Nickname: 2012 VP113 was abbreviated "VP" ...
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1answer
153 views

Discovery of Near Earth Objects (NEO's)

Near Earth Objects (NEO's) have been mapped by NASA and JPL since 1990's. The graph below shows how many of these potential planet-killers have been found and classified over the years. I am curious ...
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1answer
142 views

What is this thin, square-ish object on asteroid Bennu? How big is it?

What could this square thing be? Roughly how big is it? From BGR's Our first up-close look at the Bennu asteroid is a messy one: rotated, 2x zoomed, and sharpened. unscientifically:
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1answer
104 views

A non rotating asteroid of huge mass collides with earth. After the collision, does the length of the day on earth change?

A non rotating asteroid of huge mass collides with earth. After the collision, would the length of the day on earth increase or decrease? Why?
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1answer
183 views

Are Trans-Neptunian Objects (TNOs) asteroids?

Are Trans-Neptunian Objects (TNOs) asteroids? Please, base your answer. If possible, give sources. Thanks.
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2answers
135 views

What were the odds that ʻOumuamua passed so close to the Sun?

ʻOumuamua passed its closest point at about 0.25 UA from the Sun. Has anyone researched what the odds were that the first ever spotted interstellar object passed so close to the Sun? Being the ...
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1answer
81 views

What exactly are the “ν6 secular Sun-Jupiter-Saturn” and the “1:4 Sun-Jupiter” resonances?

In the recent Acta Astronautica article The edge of space: Revisiting the Karman Line, Harvard-Smithsonian Center for Astrophysics astronomer, Space SE contributor and "inverse namesake" of asteroid (...
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2answers
100 views

Is the passage of three asteroids near Earth today just coincidental?

I just saw in the advertisement-laden tabloid Express that three near-Earth astroids will pass the Earth today: The first of the three, dubbed Asteroid 2018 TU4, will come as close as 0.03637 ...
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1answer
100 views

What's the composition of Ceres?

Strangely, there isn't a lot of information on Ceres on the internet. I want to know the specific percentages of its composition. Thanks in advance!
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1answer
79 views

Move asteroid away with white color?

If we find asteroid flying towards us, can we change it's direction with white painting? Will the ray from sun do something?
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1answer
164 views

What cosmic disaster is most likely to happen? [closed]

Of all the different ways that the Earth can be destroyed what ways is the most likely that could happen?
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2answers
104 views

Accuracy of predicting an asteroid strike in 1987

Good People, I am writing a short story, and I wanted to include a section wherein a family is told that an asteroid is going to strike their home. The thing is, I would like to set the story in 1987,...
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2answers
205 views

What kind of a visual trajectory would an asteroid have if it were to hit Earth?

Let's say that Peter has a set of superb telescopes and he's watching the sky every night, for 3-4 months. He may not know it just yet, but there is an asteroid heading towards Earth, on a crash ...
2
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1answer
171 views

Water Ice on Meteorites

I was reading an article by David O'Brien et al. where it stated "in meteorites only the water bound to the silicates can be found, all the water ice having been lost, whereas on asteroids water ...
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1answer
219 views

Since when are we able to discover interstellar objects similar to 1I/ʻOumuamua?

Since when are our observation capabilities good enough to discover objects similar to the first discovered interstellar object 1I/ʻOumuamua (October 2017) with high probability? Could we make rough ...
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1answer
228 views

C-Type Asteroids and Carbonaceous Chondrite Meteorites

I was just wondering, what is the relationship between C-type asteroids and carbonaceous chondrite (CC) meteorites? Do CC meteorites come from C-type asteroids?
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2answers
623 views

Do asteroids originally come from debris of star remnants?

As we know, asteroids can be found in the Kuiper belt and Oort cloud, but surely the Sun only captures them, not produces them. I know that supernovae may produce heavy elements such as oxygen, ...
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1answer
85 views

What star was the asteroid 2014 MU69 predicted to occult on 2018-08-04?

From a search, I found a list of some preparatory HST observations made for the August 4, 2018 occultation of a star by the asteroid 2014 MU69 We propose observations in support of the upcoming New ...
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1answer
57 views

Are asteroid complexes and types the same?

Very novice astronomer here. I keep seeing terms like "S-Complex" thrown around when talking about asteroids, but no matter how much Googling I do I can't figure out what that exactly means (every ...
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1answer
172 views

Are there any natural satellites in retrograde Sun orbit?

As I watch the video of the asteroids being discovered, all I see is prograde orbits. Their prevalence is fully understandable and justified, but the Sun gets interstellar visitors occasionally and I ...
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2answers
1k views

Whats the probability of a hazardous impact for human life on Mars?

Yesterday my sister and I have discussed the recent efforts of SpaceX to create a permanent colony on mars. When coming to the several dangers of creating a habitat on a different planet, we got ...
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1answer
5k views

Does Jupiter help to protect the Earth against comets/asteroids impacts?

Does Jupiter help to protect the Earth against comets or asteroids impacts? Some astronomers believe that one reason Earth is habitable is that the gravity of Jupiter does help protect us from some ...
4
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1answer
665 views

Simple mathematical models of solar systems

I’m a hobbyist programmer with a profound love for procedural content generation. I’m working on a 2D space exploration game and while it’s not meant to simulate anything real, I’d like to give it a ...
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2answers
82 views

Data on the composition and orbits of asteroids

I am interested in the composition of asteroids from the perspective of determining potential targets for mining. I expect there already exists some data that can be used to identify reasonable ...
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2answers
293 views

How did astronomers determine the path of 'Oumuamua so quickly?

The interstellar asteroid 'Oumuamua was discovered on October 19, 2017. Once discovered, less than a month's worth of precovery observations were found on various sky surveys. By mid-November, ...