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Asteroid Impact on Earth 2032 with Probability 1% and 8Mt Energy

cneos.jpl.nasa.gov

351–360 of 374 posts

Re: Asteroid Impact on Earth 2032 with Probability 1% and 8Mt Energy

#351

Earlier quoted context omitted.

[flagged]

I don't want to come off too harsh here -- not a personal attack -- but I genuinely don't understand why folks are sharing the output from LLMs. It's usually too long, it's not written by a human (which is why I came to HN), and I could have trivially asked an LLM myself!

Some people are literally just that out of touch.

Imagine if every forum was just screenshots of google search results.

Re: Asteroid Impact on Earth 2032 with Probability 1% and 8Mt Energy

#352
post #340

Earlier quoted context omitted.

By 'solve' do you mean 'write a limerick about'?

You don’t think we will have AGI or even ASI by then to have significantly improved tech? I would be we will

An AI that can save us from an asteroid hitting earth in 2032? I think that is highly unlikely.

Re: Asteroid Impact on Earth 2032 with Probability 1% and 8Mt Energy

#353
post #333
post #198

Earlier quoted context omitted.

Knowing if it will hit is a lot easier than knowing where. Knowing where, will depend on the angle of impact - if came basically straight in (tangent to the surface) we can be pretty accurate, but the more shallow the angle the harder it will be. With a shallow angle, we'll probably be able to tell the latitude pretty well, but not the longitude.

It must be easy to determine which face of the earth it strikes though...?

The earth rotates on its axis, So knowing the exact point it hits would depend on the exact time it hits. Presumably that's why the other commenter said knowing latitude would be easier than knowing longitude.

Re: Asteroid Impact on Earth 2032 with Probability 1% and 8Mt Energy

#354
post #84

I work on the Near Earth Object Surveyor space telescope (NEO Surveyor) writing simulation code which predicts which objects we will see. This one has drummed up a bit of interest due to its (relatively) high chance of impact. I actually spent quite a bit of time yesterday digging through archive images trying trying to see if it was spotted on some previous times it came by the Earth (no luck unfortunately). Since w…

Could we stick an rtg-powered tracking beacon on it during its next flyby so that we can better calculate its orbit?

I would expect that a handful of retroreflectors, along the lines of lunar laser ranging, would be much less expensive and work about as well if not better. A radio beacon can give direction, at least within the precision of whatever array is used to locate it, but it does not directly give distance. And, with a reflective system, you can get extremely precise radial velocity by measuring Doppler shift, and all the fancy equipment needed is right here on Earth where it’s easy to maintain and upgrade. Doppler measurements of a remote beacon are dependent on the quality of the remote clock, which adds complexity and dependence on gravitational redshift at the beacon [0].

[0] I haven’t tried to calculate how much this would offset the apparent velocity, but it seems very likely to at least be detectable.

Re: Asteroid Impact on Earth 2032 with Probability 1% and 8Mt Energy

#355
post #149

Maybe it will start climbing in probability, giving us a chance to reflect, and to improve our ways. Since, if we're already doing Nazi salutes at a US Presidential inauguration, less than 100 years after we'd learned that Nazis are pure evil, then I'd understand if some higher power was ready to hit the reset button. Maybe tardigrades would evolve better. (ProTip: Be sure to send a second asteroid, to Mars, ahead of…

That salute stuff is just to distract people, maybe it was even carefully planned. I'd rather focus on Bitcoin, AI and Blockchain scams as well as nepotism. The official excuse for Ramaswamy's DOGE exit is that Musk has a tech approach to solving (?) the efficiency problems: https://www.newsweek.com/vivek-ramaswamy-asked-if-elon-musk-... Expect a lot of blockchain nonsense infiltrating the government, perhaps even a…

Doing nazi shit as a distraction is, and let me be clear, not less bad than just being a fucking nazi

I know they are looting the nation. I know they are trying to create their techno-fuedal crypto shithole empire where only Musk and Thiel get to choose who knows and does what.

But they are STILL building internment camps and already have had planeloads of brown people flown to random countries.

Another reminder that Nazis and Facists are utterly inefficient at anything because of their incompetence and stupidity. The price we paid to fly those brown people out of our country could have bought them all first class tickets on civilian planes in the fucking free market.

Nazi Germany and Facist Italy were both staggeringly stupid, incompetent, inefficient, and run by people who spent every day insisting they knew better than anyone around them, and literally criminalized proving them wrong. "At least Mussolini made the trains run on time" was always false. Empirically, the trains didn't run very well.

Re: Asteroid Impact on Earth 2032 with Probability 1% and 8Mt Energy

#357
post #206

Earlier quoted context omitted.

It's actually the opposite. Calculating an asteroid impact is much easier because it primarily involves basic Newtonian physics. In contrast, the climate is a chaotic system, making long-term predictions far more complex.

I don't know how it's opposite. There's some complex guesstimating on where an asteroid will hit. We roughly know its size. We roughly know its composition. We roughly know its speed. We can give a +/- range where the impact area will be. That's not any different than how hurricane spaghetti models do.

The difference is knowing the size, speed and composition of a hurtling rock tells you where it's going to go, where as knowing the size, speed, and composition of a hurricane does not tell you where the hurricane will go. Complexity isn't a problem, the issue with weather prediction is that it's chaotic - extremely small changes to starting conditions cause large changes to the end result.

Re: Asteroid Impact on Earth 2032 with Probability 1% and 8Mt Energy

#358
post #20

Working link: https://cneos.jpl.nasa.gov/sentry/details.html#?des=2024%20Y... 8.1 megatons of kinetic energy. According to the Torino rating, only risk of “localized destruction” (less than “regional devastation”): https://cneos.jpl.nasa.gov/sentry/torino_scale.html

imagine if you could channel that much kinetic energy into a propulsion system for interstellar travel

If you had a 100 ton spacecraft and you pumped all that kinetic energy into it with perfect efficiency, it would get up to 0.2% of light speed, fast enough to reach the nearest star in about 2000 years.

Re: Asteroid Impact on Earth 2032 with Probability 1% and 8Mt Energy

#359
post #291

Completely out of my domain and seat of pants rationing here, but although the impact probability is 1%, aren't we far far more certain about the /time/ at which it would strike earth? Could humanity collectively just migrate to the side of the world that will be shielded for a day?

Knowing the time doesn't tell you which side of the planet it will impact. The asteroid and the Earth are both moving. From the asteroid's perspective, it can get ahead of the earth and the Earth rear ends it, which from Earth's perspective is the asteroid hitting from the opposite direction that it's coming from.

Re: Asteroid Impact on Earth 2032 with Probability 1% and 8Mt Energy

#360

Perhaps this would be a good opportunity to test out asteroid deflection technologies? We've got multiple orbital refueling architectures (New Glenn, Starship...) slated to come online in the next few years, so it should be easier to pack more oomph.

You don't want to test one on something that's likely to pass close but unlikely to hit. If you might do it wrong, which is presumably the point of a test run, then that could cause it to be more likely to hit. You want to test on asteroids that are so far off from colliding that you couldn't push them onto a collision path even if you wanted to. You only mess with an asteroid that's a potential collision hazard when you have to.
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