Orionids Meteor Shower (Peak Time and Condition)

18 October 2021

Since Orionids is the second firstest meteor shower, a lot of bright meteors and trains are observed. The parant comet is 1P/Halley. In 2006 and 2007, outburst activities were observed in the world.
Radio Meteor Observation is possible to catch its activities when ourburst occured. On the other hand, however, it is impossibe to find a clear activity under no-outburst. One of this reasons is a high speed geocentric velocity.

Information of Orionids

Name (code) Orionids (008 ORI)
Active Visual(IMO) Oct.2nd – Nov.7th
Radio(IPRMO) Oct.20th – Oct.24th
Maximum Visual(IMO) λ=208°.0
Radio(IPRMO) λ=208°.6
Radiant α = 95° / δ = +16°
feature ZHR(max):30, r=2.4, V:66km/s
Radio) Maximum Activity Level=0.3 FWHM:-2°.5/+2°.0
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)

Results of Orionids by Radio Meteor Observations

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

Posted by Hiroshi Ogawa