(meteorobs) Dust trail of 45P (on Aug.12)

tom6740 tom6740 at yahoo.com.cn
Wed Aug 3 06:51:19 EDT 2005


Hello Mikhail,
  I heard that meteoroid larger than 0.5mm can produce visible 
meteors.
-Quanzhi

--- In meteorobs at yahoogroups.com, Mikhail Maslov <ast0 at m...> wrote:
> Hello, Mikiya and all,
> 
> I think, activity from 45P 1959 trail, if any, should be 
characterized
> by bright meteors, due to quite high negative ejection velocities. 
So
> far higher than average number of bright meteors from Capricurnus 
area
> could be the sigh of acting 45P meteor shower.
> 
> Also, I have a question to everybody on the list. What is the 
typical
> size of Leonid meteoroids, which produce meteors of 0 and 6 mag?
> 
> Best regards, Mikhail Maslov
> 
> 
> MS> Hello all,
> 
> MS> I am Mikiya Sato.
> MS> I calculated a trail of 45P /Honda-Mrkos-Pajdusakova in 2005.
> MS> The trail from 1959 will approach to the earth orbit this year.
> MS> First, Sergey Shanov calculated this information and he 
informed me.
> MS> I calculated more in detail. Please refer to the following 
page;
> 
> MS> http://kaicho.pobox.ne.jp/tenshow/meteor/note/45P-e.htm
> 
> MS> Outline:
> 
> MS> Trail from 1959 in 2005
> MS> Time       (UT)   Sol.Long R(AU)  E.V.(m/s)fM     Alp.   Del   
V(km/s)
> MS> Aug.10.39 09:16   137.774 +0.037  -9.1008 0.027  325.04 -11.10 
25.77  D.Node
> MS> Aug.12.65 15:36*1 139.938  0.0017 -9.1040 0.026  325.02 -11.11 
25.84  Min.
> 
> MS> *1: The time contains the error margin of a few minutes.
> 
> MS> A minimum distance point is not at Descending Node because of 
small 
> MS> inclination (about 2.6 deg.).
> MS> The appearance level of meteor is uncertain, but the level is 
not 
> MS> so large (as meteor storm). However, I think that the meteor 
is 
> MS> appearable from this condition.
> 
> MS> Sergey showed that next approach will be in 2015 (dust from 
1969).
> MS> I want also to calculate the trail on the year in the near 
future.
> 
> MS> Mikiya Sato
> MS> -----
> 
> MS> Post Script;
> MS> My page of 2005 Perseids was also opened. 
> MS> But I do not have a new information.
> 
> MS> http://kaicho.pobox.ne.jp/tenshow/meteor/109p/2005e.htm
> MS> ---
> MS> Mailing list meteorobs
> MS> meteorobs at m...
> MS> http://lists.meteorobs.org/mailman/listinfo/meteorobs
> 
> 
> ---
> Mailing list meteorobs
> meteorobs at m...
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