Meteor Shower Data

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The Leonids Meteor Shower   ·   Monitor
Table of major annual meteor showers   ·   Table of elevation/offset angles


coming up   :   ORIONIDS   &   LEONIDS


With the proven effectiveness of   K1JT's WSJT software,   it is well worth to test the early morning flow of
sporadic meteors as well as the minor showers that occur in the weeks to come.   See Gary W. Kronk's site for more



 Check OH5IY's  Scatter Activity Real Time Data Plot  

The Orionids meteor shower
lasts from Oct 02 - Nov 11, 2005
peaks on Oct 21 st / 0910UT±48hrs
ZHR : 20 meteors/hour, velocity 66.4km/sec,
several submaxima, timing & ZHR based on
statistical analysis of past maxima
  The duration of the Orionids meteor shower
extends from October 15 - 29, with maximum
occuring on Oct 21 (solar longitude=207.8°),
from a radiant of RA=95° , DECL=+16° .
The maximum ZHR is about 20 and the meteors
are described as fast.
A secondary center of activity, . . . is located
at RA=+1.23° , DECL=+0.13° around the time of
maximum.
The Leonids meteor shower
lasts from Nov 14 - 21, 2005
peaks on Nov 17 th / 1250UT±12hrs
ZHR : 20 meteors/hour, velocity 70.7km/sec,
no outburst in 2005
The duration of the Leonids meteor shower covers the period of November 14 - 20.
Maximum currently occurs on Nov 17
(solar longitude=235°), from an average radiant
of RA=153° , DECL=+22° . The maximum hourly
rate typically reaches 10-15, but most notable
are the periods of enhanced activity that occur
every 33 years - events that are directly
associated with the periodic return of comet
Temple-Tuttle. During these exceptional returns,
the Leonids have produced rates up to several
thousand meteors per hour.
Please check : The Leonids Meteor Shower
source : MS-Soft V5.1  by OH5IY source : Meteor Showers  by Gary W. Kronk
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Comets and Meteor Showers
by Gary W. Kronk
  Weekly Meteor Activity Outlook
by Robert Lunsford, American Meteor Society
The IMO Meteor Shower Calendar 2005 Meteor Scatter Projections page

from Jim Thomas's   FM DX Web
The IMO Meteor Shower Calendar 2006 IMO Solar Longitude Conversion Tables
Data 1988 - 2020
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from   Science@NASA & SpaceWeather.com :
The 2005 Perseid Meteor Shower

Picture Gallery
  Daylight Meteors Arietids 2003
Quadrantids 2005
Meteors from an Extinct Constellation
Meteors from the Twilight Zone:
Geminids 2002
The Geminid Meteor Shower
Best meteor shower of 2004
Leonid meteor rates in 2002
should equal or exceed 2001 levels !
Geminids 2004 did better than predicted
peak rates exceeded 160/hour,
observational results by IMO
Summer Sky Show Perseids 2002
The 2004 Orionids Meteor Shower

The 2004 Perseid Meteor Shower

Picture Gallery
Meteors from Halley's Comet
eta Aquarids 2002
The Unpredictable June Bootids 2004 Weird Geminids 2001
Spring Shower April Lyrids 2004 Jaw-dropping Leonids 2001
Double meteor shower Leonids 2003
on Nov13th/19th, 2003
Space Station Meteor Shower ISS crew
enjoyed unique view of the Leonids 2001
The dependable Perseid meteor shower
Perseids 2003
Anticipating the Perseids 2001
Unexpected outburst on June 27th ?
June Bootids 2003
Look, Listen, Lyrids ! April Lyrids 2001

Seasonal Variations of Meteor Rates
Graphics derived from Gerald S. Hawkins' article
"Variation in the Occurrence Rate of Meteors",
as published in "The Astronomical Journal" 61, No.1243/Nov 1956, p.388


Top · Bottom         Table of major annual meteor showers :

This table of meteor showers is by no means complete.
Lists only major showers with ZHRs ≥ 20.
Shower Period of Activity Maximum ZHR
Velocity
(km/sec)
Quadrantids Jan 1 - 5 Jan 3 120 42
April Lyrids Apr 16 - 25 Apr 22 15(90) 48
Eta Aquarids Apr 19 - May 12 May 5 60 66
Arietids May 29 - June19 June 7 60 37
z-Perseids May 20 - July 7 June 9 40 30
d-Aquarids July 12 - Aug 19 July 28 20 41
Perseids July 17 - Aug 24 Aug 12 >100(400) 60
Orionids Oct 2 - Nov 11 Oct 21 20 66
Leonids Nov 14 - 21 Nov 17 20 71
Geminids Dec 7 - 17 Dec 14 110 35
Ursids Dec 17 - 26 Dec 22 >12(90) 34



Top · Bottom        Table giving optimum antenna beam elevations and offset angles for
                                 forward-scatter MS links of various distances :

Range (km) / (mi) Elevation (°) Azimuth Offset (°)
500 / 310 18 21
600 / 373 15 18
700 / 434 13 16
800 / 497 11 15
900 / 559 09 14
1000 / 621 08 13
1200 / 746 06 11
1800 / 1118 02 10
2000 / 1243 01 10
2500 / 1553 00 08
taken from AMS Bulletin No. 203, "The AMS Radio Meteor Project",

The offset angles come from the fact that most meteor reflections will not come from meteors directly between the transmitter and receiver, but instead tend to most frequently come from two "hot spot" regions about 50-150km to either side of the transmitter-receiver great circle path midpoint. The offset angles are approximate angles which the antenna should be pointed to either left or right away from the direct bearing of the other station.
For small antennas and distances over about 1200km, these are not important.
For large arrays at shorter distances, and for all but the smallest antennas at distances less than about 800km, these can become very important. For sporadic meteors, an azimuth on either side of the direct path can be used; but both stations must offset in the same direction!
For more information, see
OH5IY's meteorscatter website
• "VHF Propagation by Meteor-Trail Ionization"
    by W4LTU (reprinted in Beyond Line of Sight, ARRL, p. 115),
• The VHF/UHF DX Book p. 2-58 from RSGB,
• and the various professional literature.


Top · Main · Solar Activity · MeteorScatter · Software · Hardware · DXpeditions · HSMS · Weather
WSJT · MeteorScatter Sound · Aurora · VHF Links · InfoPages · eMail Europe · eMail NorthAmerica
The Leonids Meteor Shower   ·   Monitor
Table of major annual meteor showers   ·   Table of elevation/offset angles

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