Perseids Meteor Shower (Peak Time and Condition)

9 March 2021

Perseids in August is one of the best meteor showers. In 1991 and 1992, outburst activity was obeserved by the return of paranet comet. It is easy to observe in visual because Perseids provides a lot of bright meteors.
In Radio Meteor Observation, Perseid activity is also possible to catch clearly every year. Since the geocentric velocity is very fast as 59km/s, it is no much meteor echoes comparing with visual observation. On the other hand, a lot of long echoes more than 20 seconds are caught. The maximum both visual and radio occuer around λ_⊙=139°.9-λ_⊙=140°.0.

Contents

1. Information of Perseids
- 1.1. Reference and Useful Links
2. Conditions in the future (2021-2025) for Radio Meteor Observations
- 2.1. Conditions in North America
- 2.2. Conditions in Other region
3. Results of Perseids by Radio Meteor Observations

Information of Perseids

Name (code)		Perseids (007 PER)
Active	Visual(IMO)	Jul.17^th – Aug.24^th
Active	Radio(IPRMO)	Aug.11^th – Aug.14^th
Maximum	Visual(IMO)	λ_⊙=140°.0
Maximum	Radio(IPRMO)	λ_⊙=139°.95
Radiant		α = 46° / δ = +58°
feature		ZHR(max):100, r=2.6, V_∞:59km/s Radio) Maximum Activity Level=1.2 FWHM:-0°.65/+0°.70
Parant Comet		109P/Swift-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.
Conditions for Visual Observers (by AMS)

Conditions in North America

Time : Daylite-Saving Time

Year	Peak Time and Condition (λ_⊙=140°.0)					Comments for Radio Obs.
Year	AST(ADT)	EST(EDT)	CST(CDT)	MST(MDT)	PST(PDT)	Comments for Radio Obs.
Year	Peak Time and Condition (λ_⊙=140°.0)
2021	Aug 12^th 16^h	Aug 12^th 15^h	Aug 12^th 14^h	Aug 12^th 13^h	Aug 12^th 12^h	better condition at western
2022	Aug 12^th 22^h	Aug 12^th 21^h	Aug 12^th 20^h	Aug 12^th 19^h	Aug 12^th 18^h	better condition at eastern
2023	Aug 13^th 04^h	Aug 13^th 03^h	Aug 13^th 02^h	Aug 13^th 01^h	Aug 13^th 00^h	Best condition !
2024	Aug 12^th 11^h	Aug 12^th 10^h	Aug 12^th 09^h	Aug 12^th 08^h	Aug 12^th 07^h	Best condition !
2025	Aug 12^th 17^h	Aug 12^th 16^h	Aug 12^th 15^h	Aug 12^th 14^h	Aug 12^th 13^h	better condition at western

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_⊙=140°.0)				Comments for Radio Obs.
Year	GMT(UK)	CET(Italy)	IST(India)	JST(Japan)	Comments for Radio Obs.
Year	Peak and Condition (λ_⊙=140°.0)
2021	Aug 12^th 19^h	Aug 12^th 20^h	Aug 13^th 00^h	Aug 13^th 04^h	East Asia is better condtion
2022	Aug 13^th 01^h	Aug 13^th 02^h	Aug 13^th 06^h	Aug 13^th 10^h	Asia is best condition
2023	Aug 13^th 07^h	Aug 13^th 08^h	Aug 13^th 12^h	Aug 13^th 16^h	West Europe is better
2024	Aug 12^th 14^h	Aug 12^th 15^h	Aug 12^th 19^h	Aug 12^th 23^h	low radiant elevation
2025	Aug 12^th 20^h	Aug 12^th 21^h	Aug 13^th 01^h	Aug 13^th 05^h	Asia is better condition

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

Results of Perseids by Radio Meteor Observations

Result of Perseids is recorded by worldwide radio meteor observers.
Result of Perseids

Posted by Hiroshi Ogawa