This report provides results of monthly report in Augsut 2017 and major two meteor showers that were δ-Aquariids and Perseids 2017. These results were provided by The International Project for Radio Meteor Observation(IPRMO). δ-Aquarrids had a possiblity that was weaker activity than annual years. On the other hand, Perseids was same activity level and profile as annual years.
delta-Aquariids 2017
From the end of July to first of August, δ-Aquariids peak came to us. Although the clear activity was observed in this year, it had a possibility that the activity level in this year was weaker than annual years. The estimated maximum level was 2.5 at solar longitude = 126°.50 (29th July). FWHM has -72.0 hours and +84.0 hours. The beginning of clear activity was aruond solar longitude =118°. The ending was around 138°. After the peak time, the dereasing speed was later around 132°-134°.
Figure 1 – δ-Aquariids 2017 using data at 29 observing stations in 11 countries.
You can see past results:
http://www.amro-net.jp/meteor-results/07_aqrdelta.htm.
Perseids 2017
Perseids 2017 showed the same activity level as annual years. The estimated peak time was around solar longitude = 139°.91 (16:30(UT) on 12th August) with maximum activity level = 1.5. FWHM had -13.0 hours and +18.0 hours. Although higher activities were observed in 2014 and 2016, 2017 came back to 2013 activity level (annual activity level).
Figure 2 – Perseids 2017 using data at 29 observing stations in 10 countries.
You can see past results:
http://www.amro-net.jp/meteor-results/08_perseids.htm.
August, 2017
Following four graphs shows monitoring results in four areas that are Europe at 15 observing stations, North America at six stations, South America at three stations and Japan at eight stations.
The higher activity in the first ten days of July was influenced by the δ-Aquariids activity. Perseids was observed almost of stations except for South America. At the end of August, some stations caught increase of activity level 29th – 31st. It was not clear what activity was.
Figure 3 – Monitored result for August 2017 in European Area.
Figure 4 – Monitored result for August 2017 in North American Area.
Figure 5 – Monitored result for August 2017 in South American Area.
Figure 6 – Monitored result for August 2017 in Japan.
Acknowledgement
— Radio Meteor Observing Bulletin (RMOB)
— Radio Meteor Observation in Japan (RMOJ)
— all radio meteor observers
