(meteorobs) RE: Question about radiant drift

Sergey Shanov shanov-2004 at yandex.ru
Mon Jun 14 13:21:30 EDT 2004

The complexity and drift radiants, really, depends on a position of an orbit of a meteor shower. As an example, radiants of a comet 73P:
Date delta_r (AU) alpha delta Vg
May 15   0.054     209   +21 14.0
May 22   0.042     211   +25 13.2
May 31   0.054     209   +29 12.2

What before you stands the task? You know a position radiant for date? Can
be then on this radiant it is necessary to define an orbit. And already
knowing an approximate orbit it is possible to define a drift radiant. So?
What exactitude is necessary?

> I think a good rule of thumb would be, one degree parallel to the ecliptic
> for each degree in solar longitude?
> - Marco

> I'll take a stab at it. It seems to me that radiant drift would be unique
> to each shower because of the shower's orbital inclination, whether the
> meteor stream approached the Earth from behind or the front of Earth's
> in space, and the unique orbit that each meteor stream has. I don't see
> a simple formula would be able to handle these features, but I'm waiting
> someone to tell me how they would. :-)
> Pete Bias
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