(meteorobs) June Bootids - Call for observations

[putmi]

Hi list,

No June Bootid observations for 22-23 june in Belgium : a rare 
summer Storm depression is on his way...

Good luck for all the observers,

Michel
VVS Belgium - meteor section
Dutch Meteor Society


--- In meteorobs at yahoogroups.com, RainerArlt  <rarlt at a...> wrote:
> 
> 
> =================================
>     Call for observations
> =================================
> 
> Numerical computations of the June Bootid meteoroid stream by
> several researchers has revealed heighetened chances to see a
> maximum of June Bootid activity this year as early as
> 
>    2004 June 23, roughly 10h - 19h
> 
> A global converage of June Bootid activity will be a most 
> helpful campaign in validating the numerical models. Obser-
> vations are required also for times not covered by the 
> predictions. It is unlikely though that a meteor storm will 
> occur. Enhanced meteor rates may mean that as few as 10 June 
> Bootids are appearing per hour.
> 
> It is thus recommended to plot the meteors into gnomonic
> star maps and test for June Bootid membershift _after_ the
> observation. This method has proven to give more reliable
> results. 
> 
> The entry velocity of the June Bootids is extremely slow:
> 18 km/s (geocentric speed 14 km/s). June Bootids are very
> slow meteors. If the meteor looks slow, it is not a June
> Bootid. Only if it looks _unusually_ slow, it is one. Once
> you have seen a real one, you'll know what I try to convey
> here.
> 
> Note that the apparent radiant is always shifted towards
> the zenith by a few degrees. This is because of the slow
> speed of the June Bootids. Take the true radiant at
> alpha ~ 223 deg (RA = 14h50), delta ~ +47 and shift it
> slightly towards the zenith. June Bootids should come from
> this point.
> 
> Please send your observing reports in a style similar to
> 
>      http://www.imo.net/visual/imoform.html
> 
> to me at rarlt at a..., or to the meteorobs mailing list
> at meteorobs at m... if you wish to share your expe-
> riences with others.
> 
> Times below are rounded to 1/2 hours.
> 
> 
> Mikiya Sato:
> ------------
>   Times between 12:30 and 19:30 UT are given depending on the
>   dust trail approaching the Earth.
> 
> Sergey Shanov & Sergey Dubrowskiy:
> ----------------------------------
>   Times of 09:30 - 13:00 UT are given for various encounters to
>   very small distances from the Earth. Other possibilities
>   are 14:00, 15:30, 18:00 UT.
>   
> 
> Jeremie Vaubaillon:
> -------------------
>   A time centered on 11:00 UT is given.
> 
> 
> 
> Clear skies,
> Rainer Arlt
> 
> --
> Rainer Arlt  --  Astrophysikalisches Institut Potsdam -- www.aip.de
> Visual Commission - International Meteor Organization -- 
www.imo.net
> rarlt at a... --  phone: +49-331-7499-354  --  fax: +49-331-7499-526
> 
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