11/10/2018 @ 10:49 UTC
33.290977 • -87.934511
This event was a PROBABLE meteorite fall that occurred at 04:49 AM local time on 10 November 2018, the 243rd birthday of the United States Marine Corps. This is 10 Nov 2018 at 10:49:52 UTC. Events are recorded as “probable” if they produce well-defined signatures of a meteorite fall in weather radar imagery at the time and place described by eyewitnesses, but no meteorites have been recovered from the event to date. The fireball was an early morning fireball observed by allsky cameras from the NASA Meteoroid Environment Office and seventeen eyewitnesses reported it to the American Meteor Society across Alabama and Georgia. One eyewitness near Calhoun, GA reported hearing sonic booms from the falling meteorites but the distance involved makes this an error.
Meteorites have not been recovered from this event, to date.
The NASA Meteoroid Office calculated the pre-atmospheric orbit of the parent meteoroid, and determined that it has an orbit very close to that of the Earth-Moon system, with a very low infall speed of 12 km/s. This speed is too fast for “space junk” and must be a meteoroid. One possible explanation is that this is a meteorite originating from the Moon, or a lunar meteorite.
NASA's Meteoroid Environment Office maintains a suite of all-sky meteor cameras across the U.S. All meteors seen by this system are recorded on a web page, and the Carrollton event is seen here:
Scroll down to the event at 10:49:49 UTC. Four videos were recorded of the event, click on the picture of the video to download the file. The analysis summary for this event shows an orbit that closely matches the Earth and Moon, suggesting that this might be a lunar meteorite fall (bottom center in this picture):
This event is recorded as American Meteor Society event number 4,773 for 2018. Signatures of falling meteorites can be found in imagery from two nearby weather radars. In the NEXRAD weather radar network operated by NOAA, the KDGX (Jackson-Brandon, MS) and KGWX (Columbus AFB, MS) radars record signatures of falling meteorites.
The first appearance of falling meteorites on radar occurs at 10:51:16 UTC and 15,570 m above sea level (ASL) in the 10:43 UTC data set for the KDGX radar in the 3.5 degree elevation radar sweep. Signatures consistent with falling meteorites appear in a total of six radar sweeps from the two radars, with a final signature appearing at 11:06:29 UTC.