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Norwegian Skydiver captures footage of falling meteor

Dr_Herbz said:
The rock came from roughly the same angle as the person who jumped out of the plane after him, which suggests to me that the rock was thrown by that person.
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The geometry is wrong - the other parachutist is also a wingsuit flyer with significant horizontal velocity. Analysing the video the horizontal component of his velocity (relative to the camera) is something in the neighbourhood of 100 km/h (change in apparent angular extent) so any rock 'thrown' by that individual would have a significant horizontal component as well which it is clear that the item in question does not have (relative to the camera post chute deploy).
 
Let's say the pebble took it's time unravelling itself from the chute after it opened. . Then it falls.
I may be mistaken but wouldnt the pebble be falling at a significantly higher speed than the parachutist?
Wouldn't it appear to come from above because it's falling from the chute which will have opened a few metres above the parachutist.
Dunno.....
 
2hats said:
The geometry is wrong - the other parachutist is also a wingsuit flyer with significant horizontal velocity. Analysing the video the horizontal component of his velocity (relative to the camera) is something in the neighbourhood of 100 km/h (change in apparent angular extent) so any rock 'thrown' by that individual would have a significant horizontal component as well which it is clear that the item in question does not have (relative to the camera post chute deploy).
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The guy is directly above him on one of the video shots, which was shortly before the stone appeared, and those wing suits are highly controllable. It would have been easy for him to change his course after throwing the stone.
 
bubblesmcgrath said:
Let's say the pebble took it's time unravelling itself from the chute after it opened. . Then it falls.
I may be mistaken but wouldnt the pebble be falling at a significantly higher speed than the parachutist?
Wouldn't it appear to come from above because it's falling from the chute which will have opened a few metres above the parachutist.
Dunno.....
Click to expand...
What and reach the speed of FIVE times that of a bullet?
 
bubblesmcgrath said:
Wouldn't the pebble fall faster than the parachutist once the chute opens?
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It would have an initial velocity of that of the deploying parachute+parachutist (probably something like 50-70 km/h). It would then accelerate at g to the rock's own terminal velocity (which would be significantly higher than the wingsuit flyer at any phase of the jump: 200+ km/h).
 
MrSki said:
Watch the fucking video.
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I watched the 'fucking video'... where are you getting that 5X the speed of a bullet from?
Let's assume a fairly decent factory load bullet travels at 1000m/s... Are you saying this rock was travelling at 5000m/s (18,000 kmh)?
 
Dr_Herbz said:
I watched the 'fucking video'... where are you getting that 5X the speed of a bullet from?
Let's assume a fairly decent factory load bullet travels at 1000m/s... Are you saying this rock was travelling at 5000m/s (18,000 kmh)?
Click to expand...
Okay listen to the video.
 
skydivers have been able to go as fast as 319 m/s...... faster than the speed of sound.
The pebble could be dropping at high speed....
 
Dr_Herbz said:
The guy is directly above him on one of the video shots, which was shortly before the stone appeared, and those wing suits are highly controllable. It would have been easy for him to change his course after throwing the stone.
Click to expand...

Not the shot where the rock appears. Besides which you are ignoring the horizontal component of the rock and would-be rock thrower's velocity; the camera has very low horizontal velocity post chute deploy (wind at that altitude at that time was less than 20 km/h).
 
bubblesmcgrath said:
skydivers have been able to go as fast as 319 m/s...... faster than the speed of sound.
The pebble could be dropping at high speed....
Click to expand...

Not at an altitude of 300 m they haven't. 300 m/s in the stratosphere - with the right kit, and it takes a lot of specialist kit (see Baumgartner he peaked at 377 m/s at about 28 km, was subsonic again by about 23 km and below 100 m/s by 8km) - but not sports skydiving in the troposphere.
 
MrSki said:
Okay listen to the video.
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I watched and listened, and the only mention of '5X the speed of a bullet' is if it came from an asteroid belt and had been accelerated by the sun's gravity... but that's a hypothesis, not a fact, as you seem to be asserting
 
Dr_Herbz said:
I watched and listened, and the only mention of '5X the speed of a bullet' is if it came from an asteroid belt and had been accelerated by the sun's gravity... but that's a hypothesis, not a fact, as you seem to be asserting
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I think if you listen again you might find it refers to reaching that speed when caught in the earth's gravity. Yes it is a hypothesis but I think (in my opinion) it is more likely than your hypothesis that it was thrown by the person who jumped out after him.
 
MrSki said:
I think if you listen again you might find it refers to reaching that speed when caught in the earth's gravity. Yes it is a hypothesis but I think (in my opinion) it is more likely than your hypothesis that it was thrown by the person who jumped out after him.
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Gravity shmavity... it's nothing more than a hypothesis but you were trying to pass it off as if it was a fact. I didn't attempt to pass my opinion as fact.
 
Dr_Herbz said:
Gravity shmavity... it's nothing more than a hypothesis but you were trying to pass it off as if it was a fact. I didn't attempt to pass my opinion as fact.
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You say "The rock came from roughly the same angle as the person who jumped out of the plane after him" as an assertion. You can't tell that from the video. I think you were trying to pass this off as 'a fact' but I can't be bothered with it any more.
 
Skydivers are very careful but they are prone to pranks too ...
All we know is that a stone or unidentified object passed the diver at some speed.
It looks like a pebble.
That's all anyone knows til it's found.
 
MrSki said:
You say "The rock came from roughly the same angle as the person who jumped out of the plane after him" as an assertion. You can't tell that from the video. I think you were trying to pass this off as 'a fact' but I can't be bothered with it any more.
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:facepalm:
 
2hats said:
Not the shot where the rock appears. Besides which you are ignoring the horizontal component of the rock and would-be rock thrower's velocity; the camera has very low horizontal velocity post chute deploy (wind at that altitude at that time was less than 20 km/h).
Click to expand...

If we assume the clouds are at roughly the same angle as the earth, then from the multi-frame shot, there appears to be little or no horizontal travel.

13645734974_4d586a5a7e_o.jpg
 
Dr_Herbz said:
If we assume the clouds are at roughly the same angle as the earth, then from the multi-frame shot, there appears to be little or no horizontal travel.
Click to expand...

Which is precisely my point - highly unlikely his wingsuit flying mate tried to throw it at him from above otherwise it would have significant horizontal velocity much as his mate did as he streaked past him a few seconds later.

The lack of horizontal component to the rock's velocity (and the observed vertical velocity) is consistent with having reached terminal velocity in the lower atmosphere at the end of dark flight.

e2a: if that were a pebble (order a cm or so) starting from the canopy (velocity relative to camera of near zero) then the intervals indicating distance travelled in between each frame in the video, your image above, would be too large to account for by freefall (by gravity alone, let alone gravity plus air resistance). The object needs an initial velocity (on entering the field of view) of something like 20-30 m/s to produce the apparent spacing and this is more consistent with an object of size order of 10 cm with order of 1 m of descent between each frame.

But if one considers the risers (width around 2-3 cm and approx. 0.5 m away) and compares their apparent angular extent with the item at closest approach the item clearly can't be around a cm across otherwise it would have hit/been blocked or deflected by the slider. However the angular extents are consistent with a rock of about 10 cm (maybe a few cm more) passing ~5 m away.
 
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2hats said:
Which is precisely my point - highly unlikely his wingsuit flying mate tried to throw it at him from above otherwise it would have significant horizontal velocity much as his mate did as he streaked past him a few seconds later.

The lack of horizontal component to the rock's velocity (and the observed vertical velocity) is consistent with having reached terminal velocity in the lower atmosphere at the end of dark flight.

e2a: if that were a pebble (order a cm or so) starting from the canopy (velocity relative to camera of near zero) then the intervals indicating distance travelled in between each frame in the video, your image above, would be too large to account for by freefall (by gravity alone, let alone gravity plus air resistance). The object needs an initial velocity (on entering the field of view) of something like 20-30 m/s to produce the apparent spacing and this is more consistent with an object of size order of 10 cm with order of 1 m of descent between each frame.

But if one considers the risers (width around 2-3 cm and approx. 0.5 m away) and compares their apparent angular extent with the item at closest approach the item clearly can't be around a cm across otherwise it would have hit/been blocked or deflected by the slider. However the angular extents are consistent with a rock of about 10 cm (maybe a few cm more) passing ~5 m away.
Click to expand...

There were 6 or 7 jumpers on the plane (including the tandem). We only see 3 of them in the air, so any of the others could have thrown it, or the tandem could have shit a brick :D

This fella was directly above him and therefore the most likely culprit.

13647689094_416f9a2b56_b.jpg


The fella that flew in from his left could be any one of the others from the plane. They're not necessarily the same person.

I don't think the stone was small. I think your guesstimate of 10cm or so is about right
 
Dr_Herbz said:
There were 6 or 7 jumpers on the plane (including the tandem). We only see 3 of them in the air, so any of the others could have thrown it, or the tandem could have shit a brick :D

This fella was directly above him and therefore the most likely culprit.
Click to expand...

Watching the full videos there is only one candidate for dropping the rock - the one person above him (all the rest are long gone and land well before him). That's most likely the one who overtakes him yelling, with significant relative horizontal velocity and as such highly unlikely to have released the rock.

And I'll correct the altitude (again): I think the original source has mixed their imperial and metric. The wrist altimeter clearly implies parachute deploy was somewhere around 3500 feet (~1000 metres) - fairly standard. This is still well within the range where one would have expected a meteorite to have reached terminal velocity at the end of dark flight and experience horizontal velocity only in line with the prevailing wind which was <20 km/h at that altitude at that time.
 
2hats said:
Can't really see someone else recklessly dropping it after him either (how many times would you have to try that in order to get the rock-parachutist-camera view geometry and timing right?).
Click to expand...

That's not relevant unless you assume it was deliberate. Would seem more likely kicked out of the plane by someone exiting it. Do you agree with the suggested size of the rock (to me it looks smaller than what they are saying, if we are taking the approach of doubting everything the investigators are saying).
 
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