PIA22825-FireballOverBeringSeaFromSpace-TerraSatellite-20181218

The following is a list of

bolide A bolide is normally taken to mean an exceptionally bright meteor, but the term is subject to more than one definition, according to context. It may refer to any large crater-forming body, or to one that explodes in the atmosphere. It can be a ...

s and fireballs seen on Earth in recent times. These are small asteroids (known as

meteoroid A meteoroid () is a small rocky or metallic body in outer space. Meteoroids are defined as objects significantly smaller than asteroids, ranging in size from grains to objects up to a meter wide. Objects smaller than this are classified as mi ...

s) that regularly impact the Earth. Although most are so small that they burn up in the atmosphere before reaching the surface, some larger objects may reach the surface as fragments, known as meteorites. A few of these are detected by

NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the US federal government responsible for the civil List of government space agencies, space program ...

's Sentry system, in which case the impact is predicted. Meteors with a recorded

absolute magnitude Absolute magnitude () is a measure of the luminosity of a celestial object on an inverse logarithmic astronomical magnitude scale. An object's absolute magnitude is defined to be equal to the apparent magnitude that the object would have if it ...

are then converted to an asteroidal absolute magnitude under (M_a = M_m + 31) and then converted to a diameter assuming that meteoroids brighten by approximate 10 magnitudes when entering the atmosphere. Objects reported only to the

American Meteor Society The American Meteor Society, Ltd. (AMS) is a non-profit scientific organization established to encourage and support the research activities of both amateur and professional astronomers who are interested in the field of meteor astronomy. Its affi ...

are only listed if observed by at least 100 people, and are cross-referenced wit
https://fireballs.ndc.nasa.gov
if possible, to determine further physical characteristics. The fourth and third to last parameters are calculated from http://convertalot.com/asteroid_impact_calculator.html, assuming a density of 1.5 g/cm³, an impact angle of 45°, and a velocity of 17 km/s (if not provided). The actual values for both may vary by as much as the value itself, so be aware that these values are only estimates. The bolide on 7 September 2015 is the 2015 Thailand bolide, and the bolide on 26 February 2015 may be related to the 2015 Kerala meteorite.

List

Notes

References