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Today's Meteor Activity
The 'Today's Meteor Activity' graphic shows the averaged daily Meteor Activity provided by the Radio Meteor Observing Bulletin (RMOB). It's updated every hour. This graphic is free for linking to from your own website by using this link https://mmmonvhf.de/ms/ms.png
UPCOMING METEOR SHOWERS: SEPTEMBER 2021
Even if no big meteor showers hit the Earth in September, this month deserves lot of interest by MS enthusiasts. Sporadic meteors flux is at its annual maximum in this period, thus providing relatively good rates especially during morning hours.
At the beginning of the month, have a look to Aurigids (peaking September 1st) which have produced brief unexpected outbursts with EZHR about 30-40 hr-1 in 1935, 1986, 1994 and 2019. First predicted outburst happened in 2007: EZHR reached about 130 hr-1 for about 20 minutes with lot of bright meteors and a tail, in which more faint meteors continued for about one hour after the peak.
For 2021, there may be an extra activty in the night of August 31, indicated by three indipendent calculations. All give a small minimum distance to Earth, but ZHR is uncertain (may range between 50 and 100 hr-1).
Sato: 0.00054 au, λsol= 158.383 degs, Aug 31, 21h17m UT
Lyytinen: 0.00017 au, λsol= 158.395 degs, Aug 31, 21h35m UT
Vaubaillon: 0.0001 au, λsol= 158.396 degs, Aug 31, 21h35m UT
At the time of the predicted Outburst the radiant is very low over West Europe skies, but should be high enough to detect radio activity (if any). North Eastern Europe and Asia locations are more favourite to observe the eventual outburst. See more info here.
September ε-Perseids: produced an unexpected ouburst of bright meteors on Sept. 9th 2008 and another sharp bright meteor event in 2013. Esko Lyytinen's modelling has suggested the next really impressive SPE return may not be before 2040, and 2021 activity should be at the usual annual level.
Daylight Sextantids should provide fairly good meteor rates around the end of the month. Their maximum is expected on September 27th this year, but please note that the date and timing of Sextantids maximum is actually uncertain. Recent radio data have indicated that the maximum may occur even a day earlier than expected, and it seems plausible that several minor radio maxima detected in early October may also be due to Sextantids.
For Radio Observers, the (theoretical) UT peaks for upcoming showers in September 2021 are as follows:
Active: August 28 - September 05
Maximum: September 1, 03h UT (λsol= 158.6 degs)
ZHR: Low (6 hr-1) but outburst predicted on Aug 31
Active: September 05 - September 21
Maximum: September 09, 11h UT (λsol= 166.7 degs)
ZHR: Low (5 hr-1)
Sextantids (daytime shower)
Active: September 09 - October 09
Maximum: September 27 (λsol= 184.3 degs)
2021 Peerseid Review
2021 Perseids produced some surprises: while the "normal" annual peak (which took place in the night between 12 and 13 Aug as predicted) only reached ZHR around 65 hr-1, an unexpected outburst took place in the morning of August 14, 06 to 09 UT, reaching ZHR= 130 hr-1 or even more. Lot of bright meteors ( = long bursts ) have actually been detected in the morning of Aug 14, thus resulting in an intense MS activity. More info can be found on IMO News regarding the outburst.
Have a look to 2021 Perseids activity report on IMO Website. The outburst can clearly be seen, superimposed to normal Perseids activity curve.