Well, the Peruvians claim something from above hit them...
Maleficent Mystery Meteorite Miasma.
Makes more sense then invading the Home Counties, or New Jersey for that matter; they'll want to adapt gradually to local conditions, start at altitude...
The claim is that there was a fireball and explosion near Lake Titcaca, and when the locals went to investigate (thinking maybe it was a plane crash), they found a 10-20m crater that was a few meters deep. Noxious smell reported.
Then ~ 500 people living nearby became sick.
Hm. The crater doesn't look terribly meteoritic (see story for press photo of crater).
A normal meteorite would also not be expected to release much of anything that makes people sick.
There are claims of metalic debris around the crater.
Normally I'd suspect an icy fragment, maybe releasing some volatiles like ammonia.
From the crater size you'd then expect a fragment maybe ~ 2-3 meters in diameter to have made the crater, but it is hard for such a small fragment to survive atmospheric entry.
One possibility is that it was a processed outer system body - with a rock or metal shell with some internal volatile, but there'd be at most a few tons of ice at the surface, which are not going to go very far in making nearby villagers sick, unless the topography traps the fumes and there is little wind.
Or it could have been man made - re-entering rocket body with residual volatiles or a satellite with something in the tanks.
If there is really debris around the crater and the local scientists know what they are doing we will soon know.
UPDATE: One of the comments mentions the EAS - here is the story on the Early Ammonia Servicer tank being jettisoned from the ISS in July '07 Had ~150kg of ammonia in it when dumped. ~ 600 kg metal tank, might have survived re-entry.
But if they really found magnetic iron rocks (melted?) around the crater, then it wasn't man made, but a real meteorite.
Orbital decay time was predicted to be ~ 300 days, so predicted re-entry in ~ May '08, unlikely they got it wrong by factor of 3 - no unusual solar activity in the last couple of months to move the upper atmosphere.
Lake Titcaca, Peru
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My personal theory is a hydrovolcanic eruption. You can see examples at at half day's drive in Death Valley National Park.
Yeah, well I've got complaints about the metallic debris in my neighbor's driveway.
Big question is how reliable the "fireball" claim is.
Should be on radar and/or satellite, with any luck, depending on exact trajectory.
Weinberg on manned space flight
If it was a human-built spacecraft, I'd like to point out that the standard attitude control propellant Hydrazine is quite poisonous...
If this was "The Colour Out of Space" or the derived Stephen King story, or Men In Black, be prepared for some really weird stories from South America.
yup, hydrazine would do it
easy to find out if that was it and there's anyone with analytic skills on site
then they figure out who to sue!
I would think it was more likely some sort of terrestrial venting of something. Perhaps some sortof gas built up under pressure, and the falling from the sky bit is overactive imagination. Supposedly a few scientists were sent to investigate, then maybe we will find out.
Wouldn't a decaying Molniya orbit take it over that part of the world?
On 23 July, a large tank weighing 640 kg called the Early Ammonia Servicer (EAS) was jettisoned from the international space station. It was unused and therefore contained the full original payload of what I imagine may have been several hundred kilograms of ammonia. Tanks of this nature are known to have survived re-entry. The symptoms of the villagers are certainly consistent with ammonia poisoning.
See
http://www.nasa.gov/mission_pages/station/expeditions/expedition15/e15_…
Perhaps is a martian oil company searching new areas to make profits when the oil price is rising.
It is now claimed that it was a "rocky" meteor. No physical evidence of the reputed heath effects was found.
Well, Peru, being right on the equator, can be hit by almost any Earth orbiting satellite.
The EAS tank is an intriguing possibility.
The crater still "looks wrong" in the pictures, it would help if news reports included useful things like: whether it rained; what time was the fireball, how bright was it, and which direction was it traveling/coming from.
Anyway, the Peruvian geo people are confirming it as a meteorite, saying it was a stony meteorite that presumably broke up - claim to have recovered iron rich fragments around the crater. Interesting. One news story claimed the crater was "elliptical" - that is a major red flag, if true. Can't tell from the pictures because of foreshortening.
Be really nice to know what direction it came from and if radar caught the trail at high altitude.
The Bad Astronomer reports on a likely cause...
did
did,
Actually the BA went off on a wild goose chase with this one. You could tell this wasn't a Scud impact just from the pictures. Scuds come down to Earth in one piece (don't separate their warheads), so a Scud impact leaves lots of metal pieces laying around.
Sam
I agree, the Scud hypothesis is implausible
I also don't see why the Peruvians would be shooting Scuds anywhere near the direction of the Bolivian border even if they had them to test out. They have the whole Pacific to aim at.
Any science blogger anywhere still watching this? Last I found online was Google News, with reports of magnetite and a suggestion something hit very hot and penetrated to arsenic-containing wet soil and boiled some of that out.
Found this through Slashdot:
Meteor Crash in Peru Caused Mysterious Illness
It's a bit confusing; no metal fragments, but contains iron.
Well, if there were metal fragments then generally one would suspect a spacecraft, satellite or missile/booster segment.
Unless they were iron/nickel and obviously unmachined.
"iron" probably means magnetite/ferrous oxide with a bit of nickel/iron - and they know it because of colour and response to strong permanent magnet.
I'm skeptical of the vapourised arsenic theory. Based on crater size we're looking at something like 2 meter meteorite. At 20 km/sec, mumbled, so that is about 10^13 Joules.
So order of magnitude we're looking at about a thousand tonnes of water vapourized, if the energy transfer was efficient. That is about 10^8 m^3 of saturated water vapour if I didn't drop any exponents. That is not going to stretch very far, like to any village more distant than a kilometer or two .
It'd be nice to get a solid report on the anecdotally reported fireball - brightness and direction.
I would think it was more likely some sort of terrestrial venting of something. Perhaps some sortof gas built up under pressure, and the falling from the sky bit is overactive imagination. Supposedly a few scientists were sent to investigate, then maybe we will find out.
It is now claimed that it was a "rocky" meteor. No physical evidence of the reputed heath effects was found