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meteorite
has definitions from the field of astronomy
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[ noun ] (astronomy) stony or metallic object that is the remains of a meteoroid that has reached the earth's surface
Used in print (J. F. Vedder, "Micrometeorites", in Francis S. J...)However , the conversion from mass to size is unreliable , since many photographic meteors give evidence of a fluffy , loosely bound meteorite structure with densities as low as * * f . A summary of meteorite data , prepared by Whipple ( 1958 ) on the basis of photographic , visual , and radar evidence , is given in Table 5 - 1 . From an estimated mass of 25 g for a zero magnitude meteorite , the other masses are derived with the assumption of a mass decrease by a factor of 2.512 for each unit increase in magnitude . Note that the mass scale is one to two orders_of_magnitude greater than some previously used ; for_example , Jacchia ( 1948 ) derived a scale of 0.15 g for a * * f , zero magnitude meteorite . The mass scale used in Table 5 - 1 was derived on the assumption that the motion of the glowing trail is related_to the momentum transfer to the trail by the meteorite , permitting the calculation of the mass if the velocity is known ( Cook and Whipple , 1958 ) . Related terms |
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