Leonids Meteor Shower (Peak Time and Condition)


In 1999 and 2002, great meteor storms were observed in the world. There were a lot of bright meteors because of the fastest geocentric velocity in all meteor showers.
In Radio Meteor Observation, there are a lot of long echoes because of the fast geocentric velocity. In 2001 and 2002, it was impossible to count the number of meteor echoes because observed data were covered with a lot of long echoes. On the other hand, however, it is too weak activity to catch and to determin the peak time of the Leonid activity in annual years.

Information of Leonids

Name (code)Leonids (013 LEO)
ActiveVisual(IMO)Nov.6th – Nov.30th
Radio(IPRMO)Nov.15th – Nov.20th
Radio(IPRMO)– (not clear)
Radiantα = 152° / δ = +22°
featureZHR(max):10-10000, r=2.5, V:71km/s
Radio) no detail information
Parant Comet55P/Tempel-Tuttle

Reference and Useful Links

2021 Meteor Shower Calendar (International Meteor Organization)
– A new Working List of meteor showers (Rainer Arlt et al), WGN 34:3(2006)
– Meteor Shower Workbook 2014 (J.Rendtel) ? International Meteor Organization (2014)
– Major and Daytime Meteor Showers using Radio Meteor Observation in the World covering the period 2001-2016(H.Ogawa and C.Steyaert), WGN 45:4(2017)
The American Meteor Society (AMS)

Conditions in the future (2021-2025) for Radio Meteor Observations

Below lists are observig conditions for radio meteor observers in 2021, 2022, 2023, 2024 and 2025. This is listed for radio observers (NOT for visual observers). You can see visual observing conditions as following AMS site.
icon Conditions for Visual Observers (by AMS)

Conditions in North America

Time : Standard Time

YearPeak Time and Condition (λ=235°.27)Comments for Radio Obs.
YearPeak Time and Condition
2021Nov 17th 13hbadNov 17th 12hbadNov 17th 11hgoodNov 17th 10hbestNov 17th 09hbestwestern is better condition
2022Nov 17th 19hbadNov 17th 18hbadNov 17th 17hbadNov 17th 16hbadNov 17th 15hbadradiant under horizon
2023Nov 18th 01hbestNov 18th 00hgoodNov 17th 23hnormalNov 17th 22hbadNov 17th 21hbadbetter condition in western
2024Nov 17th 07hbestNov 17th 06hbestNov 17th 05hbestNov 17th 04hbestNov 17th 03hbestunder best condition
2025Nov 17th 14hbadNov 17th 13hnormalNov 17th 12hnormalNov 17th 11hgoodNov 17th 10hbestwestern is better condition

Major cities (example)
AST(Halifox, etc.), EST(NewYork,Ottawa, etc.), CST(Cicago, etc.), MST(Denver, etc.), PST(LosAngeles, etc.)

Conditions in Other region

Time : Standard Time (NOT daylight-saving time)

YearPeak Time and Condition (λ=235°.27)Comments for Radio Obs.
YearPeak and Condition
2021Nov 17th 17hbadNov 17th 18hbadNov 17th 22hnormalNov 18th 02hbestEast Asia is best condition
2022Nov 17th 23hNormalNov 18th 00hGoodNov 18th 04hBestNov 18th 08hGoodCentral Asia is better
2023Nov 18th 05hBestNov 18th 06hBestNov 18th 10hNormalNov 18th 14hBadbest condition in Europe
2024Nov 17th 11hBadNov 17th 12hBadNov 17th 16hBadNov 17th 20hBadradiant under the horizon
2025Nov 17th 18hBadNov 17th 19hBadNov 17th 23hGoodNov 18th 03hBestEast Asia under best condition

GMT:United Kingdom, CET:Itarly, IST:India, JST:Japan

Results of Leonids by Radio Meteor Observations

Result of Leonids is recorded by worldwide radio meteor observers.
icon Result of Leonids