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

[Marcin Gawronski]

>> 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
>
> Very interesting paper but I think that it not work for Eridanids.
>
> C/1852 K1 Chacornac was observed only during 28 days and for only 31
> positions
>
> C/1854 L1 Klinkerfues was observed only during 54 days and for only
> 227 positions
>
> That I want to said it's that at that time (XIX Century) it was
> standard to think
> that a comet was in parabolic orbit if it not show in clear mode that
> it was periodic
> (no more of 200 years). 273P/Pons-Gambart was observed only during 30
> days in the same
> period and its period was calculated in 57,5 years now we know that it
> has a period of
> 187,47 years. I thin that C/1852 K1 Chacornac and C/1854 L1
> Klinkerfues can to have
> period of only 200-300 years, this it's only a possibility but it
> cannot rule out or
> a or some people(s) calculated recently their orbits with the new
> values of the mass
> of planets? It should be very interesting to can read a work similar
> at that show
> us by Marcin Gawronski on C/2011 L4 calculated for this two comets.
> Volunteeers?
> Best greetings.
> Roberto Gorelli

Hi there,

Yes it is possible that those two mentioned comets are periodic with
P~few10^3. I am not a specialist in celestial mechanics but just wanted
point out a problem with connections of long-period comets with meteor
streams.
>From my understanding of Dybczynski et al. works you need quite a large
database of positions to  calculate past/future orbits of long-period
comets because non-gravitational forces are very important in that case.
But I am not sure if the statistic of periodic comets (if there is any
sufficient data) allows for big enough number of  periodic comets with
P~few10^3 to explain observed meteor streams (in general). I would rather
bet on old streams connected with short-periodic comets.

regards & good night,

MPG