Grupa: Administrator 
Lokalizacja: Kłodzko JO80IK06AO
Posty: 45503
#5603095
Od: 2013-10-18
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Perseidy 2020 r.
UPCOMING METEOR SHOWERS: AUGUST 2020
Now it's the time for the encounter with one of the most popular meteor showers: the Perseids. Although this shower has proven to be very dynamic in recent years, (especially in the 1990s, due to the perihelion passage of their parent comet, 109P/Swift-Tuttle in 1992, having orbital period of about 130 years) more recently the meteor activity was mostly concentrated around the "normal" peak, with ZHR around 100 hr-1. However, the crossing of some dense streams has led to enhanced activity in several years (like 2016 for example).
Recent IMO observations found that timing of "traditional" broad maximum varied between λ,sol=139.8 deg to 140.3 degs, equivalent to 2020 August 12, 08h UT to 21h UT. Node is at λ,sol=140.0-140.1 degs so the peak is expected to occur on August 12 between 13h and 16h UT with ZHR around 110 hr-1.
A filament crossing has been recovered from 2018 data, on August 12 around 20h UT (λ,sol=139.79 degs). The filament is thought to be an accumulation of meteoroids in a mean-motion resonance.
A similar filament encounter (ZHR=100 hr-1) is predicteded by Peter Jenniskens at λ,sol=139.89 degs, equivalent to 2020 August 12, 10h UT.
A possible activity by β,-Hydrusids (southern emisphere shower) is predicted by Peter Jenniskens on August 16 at 14h18m UT( λ,sol=143.886 degs ) due to an encounter with a 1-revolution trail of an unknown Jupiter family comet.
Of course, some minor showers will also be active in August, k-Cygnids, daylight γ,-Leonids and Aurigids being the most significant.
Last but not least, don't forget the great help given by Sporadic Meteors: their rates are very close to annual maximum in August.
TYLKO ZAREJESTROWANI I ZALOGOWANI UŻYTKOWNICY WIDZĄ LINKI. DARMOWA REJESTRACJA
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73! Stanisław SP6MLK
Kłodzko JO80IK06AO
http://ra-ukf.iq24.pl/default.asp
http://www.ukf-te.iq24.pl/default.asp
Przemiennik SR6DKL 439.4750 MHz / 94,8 Hz |
