If it were discovered a year ago and on a collision course there would still be nothing we could do about it.

yes we could...'cause:
http://www.nasa.gov/mission_pages/asteroids/overview/fastfacts.html
http://science.howstuffworks.com/nature/natural-disasters/asteroid-hits-earth.htm

so local evacuation will be in order!
;)

Your 2 citations do nothing but confirm my assertion.

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Arecibo

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Arecibo

The large space rock that will zip past Earth this Halloween is most likely a dead comet that, fittingly, bears an eerie resemblance to a skull:)

Treat or trick? I've bought some candies for evening visitors. I don't eat them because I am nearing type 2 diabetes.
Tullio

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Speaking of sugar.
Comets carries alcohol and sugar.
https://www.sciencenews.org/article/comet-carries-alcohol-sugar
Do we have yeast activites in space?
I don't think so but it's rather intriguing.

Cheers.

NASA says it is a dead comet, having lost its coma.
Tullio

who cut it's tail?!
LoL :D
[joke]

If it were discovered a year ago and on a collision course there would still be nothing we could do about it.

yes we could...'cause:
http://www.nasa.gov/mission_pages/asteroids/overview/fastfacts.html
http://science.howstuffworks.com/nature/natural-disasters/asteroid-hits-earth.htm

so local evacuation will be in order!
;)

Your 2 citations do nothing but confirm my assertion.

you just don't get it, do you?!

if we spot an asteroid heading for Earth, we got options:
1. divert it, if we have time (early detection) & resources (lasers, putting thruster on asteroid, putting a mining-rail gun on asteroid, solar sail, solar foil, etc.)...
2. if we don't have time (let's say 6 months), then we extrapolate trajectory...calculate the point of impact & destruction...& evacuate that part of the World!

point is: saving people's lives! ;)

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non-profit org. Play4Life in Zagreb, Croatia, EU

NASA says it is a dead comet, having lost its coma.
Tullio

who cut it's tail?!
LoL :D
[joke]

If it were discovered a year ago and on a collision course there would still be nothing we could do about it.

yes we could...'cause:
http://www.nasa.gov/mission_pages/asteroids/overview/fastfacts.html
http://science.howstuffworks.com/nature/natural-disasters/asteroid-hits-earth.htm

so local evacuation will be in order!
;)

Your 2 citations do nothing but confirm my assertion.

you just don't get it, do you?!

if we spot an asteroid heading for Earth, we got options:
1. divert it, if we have time (early detection) & resources (lasers, putting thruster on asteroid, putting a mining-rail gun on asteroid, solar sail, solar foil, etc.)...
2. if we don't have time (let's say 6 months), then we extrapolate trajectory...calculate the point of impact & destruction...& evacuate that part of the World!

point is: saving people's lives! ;)

Option 1 as of today requires a decade or two of R&D so it isn't available
Option 2 works for tiny tiny rocks, any large item and the entire earth needs evacuation.
So as of today we have zero methods to deal with an incoming item.

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If it were discovered a year ago and on a collision course there would still be nothing we could do about it.

yes we could...'cause:
http://www.nasa.gov/mission_pages/asteroids/overview/fastfacts.html
http://science.howstuffworks.com/nature/natural-disasters/asteroid-hits-earth.htm

so local evacuation will be in order!
;)

Your 2 citations do nothing but confirm my assertion.

you just don't get it, do you?!

if we spot an asteroid heading for Earth, we got options:
1. divert it, if we have time (early detection) & resources (lasers, putting thruster on asteroid, putting a mining-rail gun on asteroid, solar sail, solar foil, etc.)...
2. if we don't have time (let's say 6 months), then we extrapolate trajectory...calculate the point of impact & destruction...& evacuate that part of the World!

point is: saving people's lives! ;)

Option 1 as of today requires a decade or two of R&D so it isn't available
Option 2 works for tiny tiny rocks, any large item and the entire earth needs evacuation.
So as of today we have zero methods to deal with an incoming item.[/quote]

well:
option 1 - guess what, we got decades...check the only 3 asteroids without Torino scale grade & their first hit year:
http://neo.jpl.nasa.gov/risk/
option 2 - well, so far biggest is 1950 DA...& if it hits the Earth, You'd have to be at least 500km to be safe...so lets make it a 1000km!
calculator: https://www.purdue.edu/impactearth/

so for reading: http://www.astronomycafe.net/qadir/q975.html
in general - no big rock so far can kill us! so we don't have to send Bruce Willis to drill it...
;)

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non-profit org. Play4Life in Zagreb, Croatia, EU

I hope the darn thing is long gone.

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Some people think that the whole of the Gulf of Mexico was formed by a Giant asteroid. However there is fairly good evidence that the Chicxulub 110M diameter crater is the result of a smaller impact of a 6M diameter asteroid, that is thought to have wiped out the Dinosaurs. Chicxulub.

However there may be a higher possibility that the Yellowstone caldera will go up before a large enough asteroid hits us, causing major world disruption. Option 2 below is the most logical so far, but the USA and Russia most certainly, and maybe others, have massive underground command complexes deep enough to survive. As for the rest of us well ....

if you are referring to US NORAD...no, it won't protect them! that stone can crack easily... ;)

as previously said, an asteroid more than 7km would wipe out continent or two...a 15km asteroid would probably kill everything multi-cellular on Earth...
all those small rocks without Torino scale (or if some asteroid gets on Torino scale) would just make local damage to country or several of them...so just evacuation would be in order! ;)

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non-profit org. Play4Life in Zagreb, Croatia, EU

option 1 - guess what, we got decades...check the only 3 asteroids without Torino scale grade & their first hit year:http://neo.jpl.nasa.gov/risk/

You are assuming that we know the orbit of all asteroids, comets, etc. We do not. Detection may not occur with enough time to do anything.

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if you are referring to US NORAD...no, it won't protect them! that stone can crack easily... ;)

I was referring to the Cheyenne Mountain Complex, Not Peterson Air Force Base, where NORAD is. That complex would not survive a direct hit, but would ride out the world wide fallout that would occur from a hit elsewhere.

as previously said, an asteroid more than 7km would wipe out continent or two...

I doubt that an asteroid 7km (4 miles) would wipe out a continent or two. Where do you get your figures from?

a 15km asteroid would probably kill everything multi-cellular on Earth...

15km (9 miles) would certainly cause massive tsunamis apart from anything else. Again where do you get your figures from.

The asteroid that caused mass extinction on earth 66 million years ago, had a diameter of about six miles and struck the Yucatan peninsula and left a crater, now known as the Chicxulub, measuring 12 miles deep by 124 miles wide.
http://www.theguardian.com/science/2014/jul/28/dinosaurs-asteroid-bad-timing-killed-off-biodiversity-edinburgh-scientists
Whats matter is more the speed of the mass hitting the earth.
Some objects hit us with 30 times the speed of sound.

E(kinetic) = ½ mass * velocity * velocity

Part of the Halloween comet??

Awe-inspiring fireball lights up sky over Bangkok

A bright fireball lit up the night sky above Bangkok on Monday, as an objected suspected to be a meteor burnt up in the atmosphere over Thailand.

The flash could be seen in several parts of the country, including the capital, Thai media report. Dashcam videos published soon after the fireball hit the sky show the dark night turn into day for a few seconds.

https://www.rt.com/news/320543-fireball-sky-bangkok-meteor/
Dashcam videos with link.

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option 1 - guess what, we got decades...check the only 3 asteroids without Torino scale grade & their first hit year:http://neo.jpl.nasa.gov/risk/

You are assuming that we know the orbit of all asteroids, comets, etc. We do not. Detection may not occur with enough time to do anything.

well, yes we don't know about ALL of them...

but, ever since Chelyabinsk incident & NEO-WISE project...we mapped most of bodies out there...even found some Brown dwarfs in neighborhood! ;)

so yes, I think we are safe...
unless from a Kuiper belt objects - but those are some very faint objects...our technology, as good as it is, can't save us from them! :(

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non-profit org. Play4Life in Zagreb, Croatia, EU

if you are referring to US NORAD...no, it won't protect them! that stone can crack easily... ;)

I was referring to the Cheyenne Mountain Complex, Not Peterson Air Force Base, where NORAD is. That complex would not survive a direct hit, but would ride out the world wide fallout that would occur from a hit elsewhere.

as previously said, an asteroid more than 7km would wipe out continent or two...

I doubt that an asteroid 7km (4 miles) would wipe out a continent or two. Where do you get your figures from?

a 15km asteroid would probably kill everything multi-cellular on Earth...

15km (9 miles) would certainly cause massive tsunamis apart from anything else. Again where do you get your figures from.

I know that you did refer to Cheyenne mountain...but a hit on ground will disrupt a lot of crust...even a hit on water would make tsunamis & crust disruptance...

go check my previous post with some figures from a science dr., who are experts in those field! ;)

& 15km asteroid would probably puncture crust & make massive spillage of lava, with a world wide dust coverage...so it would be a dark & cold ages...not many things would survive after impact!

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non-profit org. Play4Life in Zagreb, Croatia, EU

Have a look at one of the asteroid impact modelers that are around?
Play with the figures and see the differences in crater size - it can be fun trying to get one to skip off the atmosphere....

Example impact calculator

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Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?

speed it up a little...& make it of iron, 'cause most of them are iron! ;)

& imagine what kind of earth-quake would be from 10R...let alone 11 or 12?!
then pray to God that Yellowstone doesn't open up 'cause of asteroid hitting NY...'cause then most of Earth is thrown in Ice age!

btw, NY is a hard granite stone...it would be interesting to collide a granite with iron! ;)

& don't forget that Earth is 2/3 of oceans...& the thickness is lower in oceans by few km... ;)

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non-profit org. Play4Life in Zagreb, Croatia, EU

Even going up to an iron projectile, landing in a sedimentary basin:


Projectile:
Mass 1.41 x 1016 kg
Projectile Velocity 60 km/s
Trajectory Angle 90o
Projectile Density 8,000 kg/m3
Target Density 2,500 kg/m3
Fireball Radius 588.23 km

Impact Energy
Parameter Value
Kinetic Energy 2.54 x 1025 J
Impact Energy 2.54 x 1025 J
How frequent? 3,757,908,048 yrs

Crater
Crater Depth 1,565 m
Crater Width 252,798 m
Ejecta Thickness 0.00 m
Break-up Altitude 34,371 m
Wind Velocity 0 m/s
Richter Magnitude 11
Sound pulse amplitude 0 dB


Impacting on water is a more "interesting" problem - the depth of water is a critical factor...

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Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?

Exactly Rob. No asteroid is going to penetrate the Earth's crust and release lava, that is just nonsensical.

Except they have, consider how the moon was formed. Although there don't seem to be that many projectiles of that size available now.

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Halloweeen Asteroid

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