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Re: (meteorobs) WM1 shower?

Hi, Kiko,

> Curiously the Omicron Cetids radiant have almost the same discrepancy
> from the hypothetical WM1 radiant that that new november shower, Iota
> Autigids you mentioned early this year:
> http://www.astroarchive.com/t/display.asp?UID=1173974
>
> The hypothetical WM1 radiants is about 22 degrees to the north of Iota
> Aurigids and 25 to the south of Omicron Cetids radiant. The
> discrepancies in RA don't seem to match so well, but this can be due to
> inconsistencies in the radar data of Omicron Cetids (+40 years old).
>

I'm not sure that 2000 WM1 is just the parent comet of iota Aurigids. I
checked nearly 1000 comets and asteroids for that meteor shower, but
found there is no proper one at all. The geocentric velocity was not so
certain as that, either. But all of these data were *most possible*, and
WM1's orbit suited this possible paremeters best. This is the very reason
I guessed it is the parent.

In last month, I took part in the Sino-Dutch Leonid Expedition. The
multi-station support to calculate the orbital elements of an
iota-Aurigid (if one of them was taken in photos, at least. --of course).
That six values of elements may help to know more.

> Can these differences be credited to orbital perturbations on the comet
> or its stream?
>

I don't suppose so, though it's not impossible. If we derive that it was
credited to the orbital perturbations, we will HAVE TO explain WHY the
same phenomenon hasn't been observed on any other shower, and WHAT
coursed the perturbations, and many other similar questions.

> Can there be any link between these showers and the WM1?

If we can obtain the velocity of omicron Cetids, the problem may turn
much easier. But in any way, I don't think WM1 is a good candidate for
that type of meteor activity, which wasn't only observed in this year.
The reason is as simple as that the comet was very far away from the sun
and the earth in the past years.  ;-)


All best wishes and Clear skies!
Huan Meng  <meteorobs_menhu@hotmail.com>












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