η-Aquariids Meteor Showers (Peak time and Condition)

η-Aquariids is one of major meteor showers in southern observers. In 2012 and 2013, a little strong activity were observed in the world. Since &eta-Aquariids is a relatively broad maximum, clear activity continues for a few days. The maximum occurs at λ=45°.5 by The International Meteor Organization. Radio Meteor Observations is also possible to see its activities. The maximum is observed around λ=44°.5. It is a possibility of influence of May Daytime Meteor Showers after η-Aquariids activity.

Information of η-Aquariids

Name (code) η-Aquariids (031 ETA)
Active Visual(IMO) 19th April – 28th May
Radio(IPRMO) 29th April – 11th May
Maximum Visual(IMO) λ=45°.5
Radio(IPRMO) λ=44°.5
Radiant α = 338° / δ = -1°
feature ZHR(max):60, r=2.4, V:66km/s
Radio) Maximum Activity Level=1.0 FWHM:-1°.50/+5°.10
Parant Comet 1P/Halley

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 : Daylite-Saving Time

Year Peak Time and Condition (λ=45°.5) Comments for Radio Obs.
AST(ADT) EST(EDT) CST(CDT) MST(MDT) PST(PDT)
Year Peak Time and Condition
=45°.5)
2021 May 5th 23hnormal May 5th 22hnormal May 5th 21hnormal May 5th 20hnormal May 5th 19hnormal peak occurs under horizon
2022 May 5th 05hBest May 5th 04hBest May 5th 03hGood May 5th 02hGood May 5th 01hNormal better condition at eastern
2023 May 5th 11hBest May 5th 10hBest May 5th 09hBest May 5th 08hBest May 5th 07hBest Best condition !
2024 May 5th 18hnormal May 5th 17hnormal May 5th 16hnormal May 5th 15hnormal May 5th 14hnormal peak occurs under horizon
2025 May 6th 00hnormal May 5th 23hnormal May 5th 22hnormal May 5th 21hnormal May 5th 20hnormal peak occurs under horizon

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=45°.5) Comments for Radio Obs.
GMT(UK) CET(Italy) IST(India) JST(Japan)
Year Peak and Condition
=45°.5)
2021 May 6th 02hnormal May 6th 03hgood width= May 6th 07hBest May 6th 11hBest best condition in Asia
2022 May 6th 08hBest May 6th 09hBest May 6th 13hgood May 6th 17hNormal better condition in Europe
2023 May 6th 14hNormal May 6th 15hNormal May 6th 19hNormal May 6th 23hNormal peak occuers under horizon
2024 May 5th 21hNormal May 5th 22hNormal May 6th 02hNormal May 6th 06hBest East Asia is best condition
2025 May 6th 03hGood May 6th 04hBest May 6th 08hBest May 6th 12hNormal East Europe is better

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

Results of η-Aquariids by Radio Meteor Observations

Result of η-Aquariids is recorded by worldwide radio meteor observers.
icon Result of η-Aquariids

Posted by Hiroshi Ogawa