(meteorobs) August Eridanids and 273P Pons-Gambart?

[Marcin Gawronski]

> On Tue, 13 Aug 2013 17:14:06 +1000
>   "Michael Mattiazzo" <mmatti at westnet.com.au> wrote:
>> Hi all,
>>
>> Now that the orbit of comet 273P Pons-Gambart is now well
>>determined,
>> is the link with the august Eridanids confirmed?
>> and would we expect enhanced activity at this time?
>> I notice the MOID is 0.17AU so not likely to create meteor shower?
>>
>> regards,
>> Michael Mattiazzo
>
> Sorry for the bad English.
>
> Each time that I see the Perseids from Italy I see too some Eridanids
> coming from South and with a radiant under the horizon, Eridanids with
> slow earthgrazing traiectories.
>
> On the topic: too other comets doing origin to meteor showers have
> today big MOIDs, the fact that 273P has today a MOID of 0.17 AU it's
> not significative, perharps in the past this MOID was near zero.
>
> On the specific topic: I'm doing a search for write the page on
> Eridanids for italian Wiki
> and I found that exist many meteor radiants in Eridanus in August, the
> principal are Eta Eridanids and Epsilon Eridanids and .... their
> parent it's not 273P! Their parent comets are probably the following
>
> http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=C%2F1852+K1&orb=1
>
> http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=C%2F1854+L1&orb=1

Dear all,

I must say I am little bit surprised that there is still a believe that
long period comets (P>10^4-5) could be responsible for meteor activity.
Simulations of orbit evolutions of such comets clearly show that the
perihelion distance vary a lot from one return to another. The possibility
for creation of a stream which could result in any meteor activity is
simple negligible.

For example please look at:
http://apollo.astro.amu.edu.pl/PAD/index.php?n=WikicometPub.2011L4

where the evolution of C/2011 L4 orbit is shown.

regards,

Marcin Gawronski