Regarding your post 122.
I don’t really have a desire to enter into a discussion of planetary risks I will respond to your reasonable observations.
1. Based on photographic and acoustic evidence the object imaged over Alberta was large enough and heading in the right direction to produce a fall in the area where the meteor fragments were recovered. The probability of two meteoroids hitting the atmosphere close enough to have possibly created falls in the same location is minuscule. Minuscule enough to say that recovery of meteoric material on a frozen pond which had to have landed there after the pond froze over constitutes proof that they came from the object imaged over Eastern Alberta. If you don’t accept this please provide credible scientific evidence of other multiple falls at the same location within a one month period.
2. Near earth asteroid surveys are designed to detect objects that are large enough to pose a threat to the planet. While it would be big trouble to get hit in the head by a half pound rock going several hundred miles an hour, this object wasn’t a threat to the planet. The object that made the fish pond fall was far too small to have been picked up by any of near earth asteroid surveys in operation today. In 2002 the Lincoln Labs LINEAR and NASA/Lowell Observatory LONEOS asteroid surveys were about the only systematic surveys up and running, They only covered objects visible from the northern hemisphere (New Mexico and Arizona respectively). The Anglo-Australian AANEAS survey, covering the southern hemisphere, went out of business in 1996 and the Siding Springs Survey (SSS) didn’t come on line until 2004; so for 8 years the entire southern hemisphere was not covered. Anything coming from that direction would not have been detected. Today, in addition to LINEAR and SSS, there are a number of other smaller surveys in operation. Coverage is much better now and I doubt 2002MN would make it as close as it did - about 1/3rd the distance to the moon without being detected. Recently an object about 2 meters in diameter was detected before it hit the atmosphere Sudan.
this object wasn’t a threat to the planet.
Clearly, nor did I suggest it was.
Coverage is much better now
Yes it is, but certainly not perfect.