Meteorites are smaller than most people think
People often send me photos of large rocks that they think might be meteorites. If it is big, then it is probably not a meteorite. Here are some statistics.
Caveat 1: I took these data from the online database of the Meteoritical Society in November of 2010. The “mass” is the total mass of all stones of a meteorite. Large meteoroids fragment as they come through the atmosphere and land, so these charts exaggerate the size of any given stone of a meteorite. That is, although 50% of meteorites are less than 283 grams in total mass, 50% of meteorite fragments are much less than 283 in mass. The numbers are not really known. For example, the largest meteorite represented here is Jilin, which had an estimated mass of 4,000 kg. The largest surviving fragment was 1170 kg. This is probably the largest know fragment of any stony meteorite. There were hundreds of smaller fragments.
Caveat 2: A large fraction of the meteorites represented here are from the Sahara Desert. Sometimes for Saharan meteorites, different fragments of a single meteorite are given different names. This source of error is probably minor.
Caveat 3: All of the most massive meteorites are irons. The thirteen >10-ton iron meteorites listed below account for ~60% of the total mass of all meteorites. Data from the Meteoritical Bulletin Database.
|iron meteorite||mass (tons = 1000 kg)||where|
|Campo del Cielo||50||Argentina|