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)
Active Visual(IMO) Nov.6th – Nov.30th
Radio(IPRMO) Nov.15th – Nov.20th
Maximum Visual(IMO) λ=235°.27
Radio(IPRMO) – (not clear)
Radiant α = 152° / δ = +22°
feature ZHR(max):10-10000, r=2.5, V:71km/s
Radio) no detail information
Parant Comet 55P/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

Year Peak Time and Condition (λ=235°.27) Comments for Radio Obs.
Year Peak Time and Condition
2021 Nov 17th 13hbad Nov 17th 12hbad Nov 17th 11hgood Nov 17th 10hbest Nov 17th 09hbest western is better condition
2022 Nov 17th 19hbad Nov 17th 18hbad Nov 17th 17hbad Nov 17th 16hbad Nov 17th 15hbad radiant under horizon
2023 Nov 18th 01hbest Nov 18th 00hgood Nov 17th 23hnormal Nov 17th 22hbad Nov 17th 21hbad better condition in western
2024 Nov 17th 07hbest Nov 17th 06hbest Nov 17th 05hbest Nov 17th 04hbest Nov 17th 03hbest under best condition
2025 Nov 17th 14hbad Nov 17th 13hnormal Nov 17th 12hnormal Nov 17th 11hgood Nov 17th 10hbest western 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)

Year Peak Time and Condition (λ=235°.27) Comments for Radio Obs.
GMT(UK) CET(Italy) IST(India) JST(Japan)
Year Peak and Condition
2021 Nov 17th 17hbad Nov 17th 18hbad Nov 17th 22hnormal Nov 18th 02hbest East Asia is best condition
2022 Nov 17th 23hNormal Nov 18th 00hGood Nov 18th 04hBest Nov 18th 08hGood Central Asia is better
2023 Nov 18th 05hBest Nov 18th 06hBest Nov 18th 10hNormal Nov 18th 14hBad best condition in Europe
2024 Nov 17th 11hBad Nov 17th 12hBad Nov 17th 16hBad Nov 17th 20hBad radiant under the horizon
2025 Nov 17th 18hBad Nov 17th 19hBad Nov 17th 23hGood Nov 18th 03hBest East 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

Posted by Hiroshi Ogawa