CompuServe Messages

Meteorite etching

    05-Aug-94 05:10:41
Sb: #140255-Meteorite etching
Fm: Joseph Y. Murakami 74404,460
To: Doug Mitchell 70621,702
Hey Doug, Hope you got Al's answer cuz I couldn't have answered it better. I read somewhere that the projected size responsible for the Peekskill bolide was anticipated to be 5-10 times the mass of the recovered bowling-ball individual. That's still smaller than what I'd have guessed from the report of the bolide. From the glossy photo I've got of the stone, aside from the obvious red paint blemish on one corner and a cracked off portion of crust where it must've collided with the concrete driveway, the individual did look angular and suggestive of secondary ablation crusts along the more angular surfaces. If the other pieces were larger, then they would've fallen further north along the path of the known fragment. With such a shallow trajectory as was reported for this meteorite, that would still cover likely more than 50 linear miles! That's a lot of land to cover!…a surface area bigger than all of Oahu! When the Sikhote Alin iron meteorite fell in in Novoprokovka, Russia off the Sea of Japan, on Febuary 12, 1947, at 10:38 a.m. "a flaming fireball as large as the Sun,…and just as bright!" travelled from North to South, changing in various brillant colors, but predominantly red. A ground rumble was felt almost a hundred miles away in Vladivostok, rattling and breaking windows. Multiple impact craters were found, and curiously, the largest meteorites found were not in the largest craters, which contained only smaller fragments, shrapnel pieces (like the 6 kg piece I have). Eventually, 23 TONS of meteoritic iron was found!! Now THAT was a meteorite fall, … as versus ole Peekskill or St. Roberts, Montreal a few weeks ago. ( Now that the CCCP's breaking up, more of these meteorites seem to be reaching the meteorite markets here…keep your eyes open for great space debris momento's!) –Joseph