Month: June 2017

The magnificent outburst of the 2016 Perseids, the analyses

Koen Miskotte (1) and Michel Vandeputte (2) 1 Dutch Meteor Society k.miskotte@upcmail.nl 2 Dutch Meteor Society and Vereniging voor Sterrenkunde michel.vandeputte@hotmail.com Enhanced Perseid activity had been predicted for 2016 as a result of a sequence of encounters with some dust trails as well as the effect of perturbations by Jupiter which made Earth crossing the main stream deeper through more dense regions. Visual observations resulted in a detailed activity profile and population index profile, the observed features in these profiles could be matched with the predicted passages through the different dust trails. The 4 Rev (1479) dust trail in particular produced a distinct peak while the 7 Rev (1079) dust trail remained rather at a somehow disappointing low level. The traditional annual Perseid maximum displayed enhanced activity due to the 12 Rev (441) dust trail. 1     Introduction Since a few years it was known that the 2016 Perseids could produce an exceptional display. Several outbursts were expected due to the presence of a number of dust trails from the parent comet 109/P Swift-Tuttle, thanks to the perturbations caused by the planet Jupiter. The very same perturbations would cause the background component (the annual activity) to produce a better than usual display as Earth would pass through the more dense parts of the meteor stream. And yes, we did not get disappointed! During the night of 11 on...

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Meteor Activity Outlook for 24-30 June 2017

During this period the moon will reach its new phase on Friday June 23. At this time the moon will lie near the sun and will not be visible at night. Later in this period the waxing crescent moon will enter the evening sky but will not interfere with meteor observing, especially during the more active morning hours.

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Radio Meteor Observations in the World: Monthly Report in May 2017

Radio Meteor Observations in the World: Monthly Reports in May 2017 by The International Project for Radio Meteor Observation(IPRMO). η-Aquariids 2017 One one the major meteor showers, η-Aquariids was over in this month. The activity Level was higher than annual year. Figure 1 shows the comparision between annual year covering the period 2004-2017(red line) and this year (circle with error). The peak around Solar Longitude=44°.3 was predicted peak by several researchers. This compornent was estimated as maximum activity level=1.1 at Solar Longitude 44°.32(May 4th 20h30m(UT)) with Full Witdh Half Maximum(FWHM) -3.0hr / +3.0hr. The annual peak which has a peak around 45°.5 was shown around 45°.4-45°.6. This was estimated as maximum activity level=1.3 at 45°.41(May 5th 23h30m(UT)) with FWHM: -48.0hr / +42.0hr. The detail result : Result of 2017 η-Aquariids (by IPRMO). May, 2017 The following graph showes the monitord result (using ONLY Japanese staions) in May 2017. In Japan, There was no unusual activity except for the period of η-Aquariids. Although some high activity levels which were over usual level(0.0±0.4), they were uncertain wheather some meteor activity or observed errors or not. Acknowledgement — Radio Meteor Observing Bulletin (RMOB) — Radio Meteor Observation in Japan (RMOJ) — all radio meteor...

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Meteor Activity Outlook for 17-23 June 2017

During this period the moon will reach its last quarter phase on Saturday June 17. At this time the half-illuminated moon will rise near 0100 for most observers located at mid-northern latitudes. While these conditions are not perfect, one can still obtain good meteor viewing results simply by viewing in a direction so that the moon lies out of your field of view. Conditions improve with each passing night as the moon wanes and rises later and later.

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The remainders of an old acquaintance: Eta Lyrids from comet IRAS-Araki-Alcock (C/1983 H1)

by Carl Johannink and Koen Miskotte Routine CAMS BeNeLux observations during the nights of May 9–10 and May 10–11 collected 26 meteors belonging to the eta Lyrids (145 ELY), which are associated with comet IRAS-Araki-Alcock (C/1983 H1). Further searches on the nights around this peak produced another 6 candidates. Radiant positions and orbital elements are in good agreement with previous CAMS results (Jenniskens et al., 2016). A short summary of historical visual observations is also given. 1  The origin of the Eta-Lyrids The η-Lyrids are the remainders from the long periodic comet C/1983 H1, better known as comet IRAS-Araki-Alcock with...

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