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November 09, 2018: Earth Impacting Debris From Comets And Asteroids

Posted on Sep 26, 2018 in Seminars

Peter Jenniskens (SETI Institute/NASA AMES Research Center)

Talk Title: Earth Impacting Debris From Comets And Asteroids

Abstract:

The results from ongoing surveys are described that have mapped out our annual meteor showers. Data can now be accessed online in near-real time, facilitating the monitoring of unusual meteor shower activity. Comets dominate the influx at meteoroid sizes < 10 cm. Above 10 cm, meteors are mostly from debris of asteroid collisions. Those meteoroid streams manifest on Earth very differently. So far, 36 meteorite falls have been observed by cameras, providing a first glimpse into where in the asteroid belt the collisions occurred that are producing our meteorites. A recent fall over Botswana resulted in the recovery of material from asteroid 2018 LA. Since early 2017, a new instrument on the GOES-16 and GOES-17 weather satellites is providing position and light curve data for bolides that occur over the Americas.