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Radio Meteor Observations in the World: Monthly Report in December 2016


This page provides a monthly report of worldwide radio meteor observations in December 2016. Worldwide data were provided by Radio Meteor Observing Bulletin (RMOB) and Radio Meteor Observation in Japan (RMOJ)


Geminids 2016

One of major meteor showers, Geminids was over in this month. There was no unusual acitivty in this year. The peak was estimated as around 21:30(UT) on 13th Dec. with peak level A(max)=4.0. This activity profile was same as 2013 and 2015.

Geminids 2016
using 30 observing staions in 12 countries

You can see detail information on Result of Geminids 2016 page.
In addition, Mr.Hirofumi Sugimoto converted to visual ZHR from Activity Level index.
(http://www5f.biglobe.ne.jp/~hro/Flash/2016/GEM/index.html)


Ursids 2016

At the end of December, Ursids showed high activity around 10:30(UT) on 22nd Dec.(Solar Longitude: 270°.78). The structure has A(max)=1.0 with FWHM=-2.0/+4.0 hours. Although Ursid strong activity was also observed in 2014, the activity in 2016 was weaker than 2014.

Ursids 2016
using 22 observing staions in 10 countries

You can see detail information on Result of Ursids 2016 page.
In addition, Mr.Hirofumi Sugimoto converted to visual ZHR from Activity Level index.
(http://www5f.biglobe.ne.jp/~hro/Flash/2016/URS/index.html)


The possibility of outburst on 2nd - 3rd December

On 2nd - 3rd in December, a possible outburst activity was predicted by J. Vaubaillon. It was 66-Draconids with α=310° and δ=+64°. Althogh worldwide data were calculated, there was no unusual activity.
In addition, CAMS-Network recorded some activity around December κ Draconids with α=186° and δ=70°(see Meteor-News). On the other hand, however, worldwide radio meteor observations did not seen this activity. In the case of Activity Level index, it becomes possible to detect some meteor activity which is more than ZHR=20-30(depending on geocentric velocity).

66-Draconids
using 17 observing staions in eight countries
December κ Draconids 2016
using 17 observing staions in eight countries

Mr.Hirofumi Sugimoto converted to visual ZHR from activity level index, and it has possibility as very weak December κ Draconids activity. This result showed a Zenithal Hourly Rate was around 20.(http://www5f.biglobe.ne.jp/~hro/Flash/2016/DKD/)


Monitoring of Meteor Activity using Japanese radio meteor observations

The following graph showes the monitord result (using ONLY Japanese staions) in December.

Monitoerd result in December (only Japan)

Geminid clear activity was observed between 10th and 15th. Ursids was not clear in Japan. This is because a radiant elevation was located in low. There was no unusual activity except for Geminids period.


Acknowledegment:
-- Radio Meteor Observing Bulletin (RMOB)
-- Radio Meteor Observation in Japan (RMOJ)
-- all radio meteor observers