[meteorite-list] Annual Influx Rate and Average Velocity
From: al mitt <almitt_at_meteoritecentral.com>
Date: Tue, 23 Aug 2011 17:31:37 -0400
Hi Robert and all,
I think it is John G. Burke in his book Cosmic Debris that has a chart that
shows influx and a pretty broad scale. The scale shows Impacts that occur. A
1 micron diameter object collides every microseconds, a 1 mm diameter every
30 seconds, a 1 meter diameter every year, a 100 meter diameter every 10,000
years and a 10 km diameter every 100,000,000 years. I know that is pretty
broad for what you want.
There was also a Canadian Study done a few years back. Think they figured
10,000 objects over 100 grams influx. Over 3/4 of those hit water. About
3,000 hit land in a years time in the 100 gram range.
As for speeds, depending if the Earth is traveling into a stream or if the
stream is catching up would give a drastic variation in collisions speeds.
The ones that tend to catch up survive most often.
Perhaps others can chime in on this and help out further.
----- Original Message -----
From: "Robert Beauford" <robertbeauford at rocketmail.com>
To: <meteorite-list at meteoritecentral.com>
Sent: Tuesday, August 23, 2011 4:22 PM
Subject: [meteorite-list] Annual Influx Rate and Average Velocity
I need a decent estimate of average annual meteorite influx rate (total mass
at all scales per year) and I'm not sure who has done the best and most
Can anyone suggest a source?
Also, does anyone have any idea whether anyone has worked out a meaningful
average speed (from real data) for inbound objects?
I suspect that everything from pebble size to large masses have one average
velocity and that dust has a different average velocity.
Any insights would be greatly appreciated.
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Received on Tue 23 Aug 2011 05:31:37 PM PDT