retardation point | has duration zero (it is a point in time) | ![2001-09-27 09:30:07.0 2001-09-27 09:30:07.0](facet.gif) |
does not occur for meteoroids heavier than 10 tons they impact with a significant fraction of their cosmic velocity | ![2001-09-27 09:30:07.0 2001-09-27 09:30:07.0](facet.gif) |
has altitude inversely proportional to the mass of the meteoroid | ![has source: Heide, Fritz 1964, Meteorites, University o Chicago Press, 2001-09-27 09:30:07.0 has source: Heide, Fritz 1964, Meteorites, University o Chicago Press, 2001-09-27 09:30:07.0](facet.gif) |
has start time shortly after the time of initial contact with atmosphere but before impact | ![2001-09-27 09:30:07.0 2001-09-27 09:30:07.0](facet.gif) |
has definition the point in the flight of a meteoroid through the atmosphere where it loses its cosmic velocity and falls freely due to gravity | ![2001-09-27 09:30:07.0 2001-09-27 09:30:07.0](facet.gif) |
is a kind of meteor event | ![2001-09-27 09:30:07.0 2001-09-27 09:30:07.0](facet.gif) |
impact event | can produce a crater | ![2001-09-27 09:30:06.0 2001-09-27 09:30:06.0](facet.gif) |
event | has synonym world point | ![2001-09-27 09:29:57.0 2001-09-27 09:29:57.0](facet.gif) |
has time of occurrence | ![2001-09-27 09:29:57.0 2001-09-27 09:29:57.0](facet.gif) |