Meteorscatter

If you want to read more about the theory, practice, tools and so on please feel free to take a look at some articles in our FORUM.

Today MS
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: JANUARY 2018

As usual, Quadrantids open the list of meteor showers of the year.
Quadrantids maximum is typically rather sharp, with ZHR varying in the range 60-200 hr-1.
Its maximum in 2018 is expected to occur on January 3rd, 22h UT, with ZHR = 110 hr-1. This peak time is is based on data collected from IMO in 1992 (the best observed return of the shower ever analyzed), and was confirmed by radio results in most years since 1996.
Mass sorting of particles across the meteoroid stream related to the comet 96P/Machholz and the minor planet 2003 EH1 may make fainter meteors reach maximum up to 14 hours before the brighter ones.
It has also to be noted that in few returns since year 2000, a radio maximum has followed the main visual maximum by some 9-12 hours.

Have a check also to k-Cancrids, since an outburst recently took place (2015, radar and video outburst on January 10; activity was also found in 2016 video data). Check the period around January 9th, 21h UT, for possible activity


For Radio Observers, the (Theoretical) UT peaks for upcoming showers in January 2018 are as follows:

Quadrantids
Active: December 28 - January 12
Maximum: January 3, 22h UT (λsol= 283.15 degs)
ZHR: HIGH (110 hr-1)

γ-Ursae-Minorids
Active: January 10 - January 22
Maximum: January 18 (λsol= 298 degs)
ZHR: low

(Source: IMO)




SOME TIPS ABOUT QUADRANTIDS:
The Quadrantids Radiant is circumpolar (that means, is above horizon the entire day) for every observer northern of about 41 deg N latitude during shower activity. At southern latitude in Europe, the radiant will set in the evening-early night.

For a Central Europe observer (say, in JN59 square and surroundings), radiant elevation is relatively low above horizon in late afternoon till early night (16:30-23 UT). Radiant culminates around 08 UT and remains rather high above horizon between 00 and 16 UT. Optimal height of radiant above horizon for best radio efficiency can be found between 01 UT and 05 UT, and between 11 UT and 14 UT.

Best geometric efficiency direction Vs. Time around Quadrantids maximum can be summarized as follows:


Direction of radio path vs. Time for best efficiency (UT):

N/S: 03-04 UT and 11-13 UT
NE/SW: 10-15 UT
E/W: 00-02 and 13-15 UT
NW/SE: 00-05 UT


For an observer in Moscow, Russia (KO85), radiant elevation is relatively low above horizon only few hours in the early evening (17-19 UT). Radiant culminates around 06 UT and remains rather high above horizon in the early morning (04-08 UT). Optimal height of radiant above horizon for best radio efficiency can be found between 09 UT and 13 UT, and between 23 UT and 03 UT.
For the Russian observer mentioned above, best geometric efficiency direction Vs. Time around Quadrantids maximum can be summarized as follows:

Direction of radio path vs. Time for best efficiency (UT):

N/S: 00-03 and 09-12 UT
NE/SW: 09-14 UT
E/W: 12-16 and 20-00 UT
NW/SE: 23-03 UT



These calculations are valid for the observers as mentioned. Moving significantly away from that areas will somewhat change the times for best efficiency, so this table should be used only for an approximate evaluation (although somehow valid for most Europe or West Russia). Check your actual directions for best efficiency Vs. Time for your area, using tools like Virgo, OH5IY soft and so on. Please note that the above calculated efficiency applies better on Underdense trails ( that produce Pings), while Overdense trails ( that produce longer Bursts) are somewhat less dependent by geometry (radiant position with respect to direction of radio path).

2017 GEMINIDS:
Meteor activity during Geminids shower has been remarkable this year; have a look to reports on IMO Website.