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The Latest Information of Ursids 2021

Last Updated :23 23:50UT

This page provides the latest activity information of Ursids by using worldwide Radio Meteor Observations from RMOB. This information was published by Hirofumi Sugimoto (Japan) and Hiroshi Ogawa (Japan). 

Summary: Ursids 2021 strong activity was over. A higher activity was seen around 06h-09h December 22nd UT (λ=270°.32 – 270°.45).

This result may change in the future.

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Estimated ZHRr

by Hirofumi SUGIMOTO

  • 40 observed data were used.
  • Sugimoto H. (2017). “The New Method of Estimating ZHR using Radio Meteor Observations”. eMetN, 2,109–110.

Activity Level Index

by Hiroshi Ogawa

Ursids 2021 Activity Level

  • 42 observed data in 14 countries.
  • Ogawa H., Toyomasu S., Ohnishi K., and Maegawa K. (2001). “The Global Monitor of Meteor Streams by Radio Meteor Observation all over the world”. In, Warmbein Barbara, editor, Proceeding of the Meteoroids 2001 Conference, 6-10 August 2001, Swedish Institute of Space Physics, Kiruna, Sweden. ESA Publications Division, European Space Agency, Noordwijk, The Netherlands, pages 189–191.


Posted by h-ogawa