(meteorobs) Encounter of Dust Trail of 15P/Finlay

Sergey Shanov shanov-2004 at yandex.ru
Thu Feb 12 11:06:06 EST 2015


Dear, list,

More detailed research of collisions cometary of trails 15P did Mikhail
Maslov:
http://feraj.narod.ru/Radiants/Predictions/1901-2100eng/Finlayids1901-2100eng.html .

Sergey



> Dear all,
>
> I am Mikiya.
>
> Outbursts of comet 15P/Finlay were observed at the end of last year and
> at the beginning of this year.
> So, I tried to calculate the dust trail which was formed from the dust
> ejected at this perihelion in 2014.
> As a result, I found that a dust trail from 2014 will encounter the earth
> in 2021 as shown below.
>
> Peak Time : 2021 Oct.07 01:10 (UT) (LS. : 193.699 deg.)
> Delta-R : +0.000037au (5500km!!)
> Ejection velocity : +67.35 m/s
> fM : 1.1 (1-revolution trail)
> RP : Alp. 255.68 deg. Del. -48.35 deg.
> Vg : 10.74 km/s
>
> The distance between the earth and the dust trail is very small,
> it is only 5500km.
>
> However, the ejection velocity in the part of this dust trail
> should be 67m/s, which is so large. In case of such a high ejection
> velocity, a meteor shower does not appear or the magnitude of meteors
> should be very faint if it appears.
> The present outburst of the parent body 15P/Finlay seems to be so large
> that small meteoroids may be released at such a high velocity. Anyway,
> it may become a very interesting event to extract information on the
> cometary outburst.
>
> In addition, in 2021, the encounters of other dust trails ejected
> in 1988 and 1995 have been already shown in "Meteor Showers and their
> Parent Comets" by P. Jenniskens.
> It was calculated by Shanov and Dubrovski.
>
> Best wishes,
>
> Mikiya Sato
> mail at kaicho.net




---
Это сообщение проверено на вирусы антивирусом Avast.
http://www.avast.com




More information about the meteorobs mailing list