## Re: Ikeya-Seki info

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• Of the three questions below, it s really the approximate current distance from the Sun that I m most interested in. When I tried to create a diagram in a
Message 1 of 4 , Feb 1, 2005
Of the three questions below, it's really the approximate current
distance from the Sun that I'm most interested in. When I tried to
create a diagram in a planetarium program (Voyager III) showing the
comet's current position, it placed the comet about 4/5 of the way to
aphelion which, considering that timewise the comet is less than 1/10
of the way there, seemed a bit extreme--even considering that the
comet spends most of its time out near the aphelion point, at which
it's moving slowly enough that you could probably outrun it, and as a
sungrazer there's an unusual extreme between aphelion and perihelion
distance. So although a little voice is running through my head,
crying "...the radius vector sweeps out equal areas in equal time..",
it's entirely another matter to translate that into a distance, or
the percentage of the way to aphelion. :-)

--Tony

--- In comets-ml@yahoogroups.com, "Tony Hoffman" <tonyhoffman@e...>
wrote:
>
> Hi, all--
> I'm trying to find some information on Comet Ikeya-Seki (C/1965 S1)-
-
> rather, the main component of the two that were left after the
> comet's fragmentation soon after perihelion, the one with a period
of
> ~880 years and an aphelion of 183 AU -- for a project I'm working
on.
> In particular, I'm looking for its velocity at perihelion, velocity
> at aphelion, and approximate current distance from the Sun. I'd
> appreciate any help in this.
> Thanks,
> Tony
• Tony, My data says that Ikeya-Seki reaches aphelion in 2404 at a r distance of 183 AU. It is currently at about 60 AU out. Its orbital speed at a perihelion
Message 2 of 4 , Feb 1, 2005
Tony,
My data says that Ikeya-Seki reaches aphelion in 2404 at a r distance
of 183 AU.
It is currently at about 60 AU out. Its orbital speed at a perihelion
distance of .008 should have been 462 kps. I show its orbital speed at
aphelion as .02 kps......Don Pearce

Tony Hoffman wrote:

>Hi, all--
>I'm trying to find some information on Comet Ikeya-Seki (C/1965 S1)--
>rather, the main component of the two that were left after the
>comet's fragmentation soon after perihelion, the one with a period of
>~880 years and an aphelion of 183 AU -- for a project I'm working on.
>In particular, I'm looking for its velocity at perihelion, velocity
>at aphelion, and approximate current distance from the Sun. I'd
>appreciate any help in this.
>Thanks,
>Tony
>
>
>
>
>
>
>NOTICE: Material quoted or re-posted from the Comets Mailing List should be indicated by:
>
>Comets Mailing List [date]
>http://www.yahoogroups.com/group/comets-ml
>
>
>
>
>
>
>
>
>
>
• Thanks a lot, Don-- I appreciate your help. Tony ... distance ... perihelion ... speed at ... S1)-- ... of ... on. ... velocity
Message 3 of 4 , Feb 1, 2005
Thanks a lot, Don--
Tony

--- In comets-ml@yahoogroups.com, Don Pearce <bigdp1@s...> wrote:
> Tony,
> My data says that Ikeya-Seki reaches aphelion in 2404 at a r
distance
> of 183 AU.
> It is currently at about 60 AU out. Its orbital speed at a
perihelion
> distance of .008 should have been 462 kps. I show its orbital
speed at
> aphelion as .02 kps......Don Pearce
>
> Tony Hoffman wrote:
>
> >Hi, all--
> >I'm trying to find some information on Comet Ikeya-Seki (C/1965
S1)--
> >rather, the main component of the two that were left after the
> >comet's fragmentation soon after perihelion, the one with a period
of
> >~880 years and an aphelion of 183 AU -- for a project I'm working
on.
> >In particular, I'm looking for its velocity at perihelion,
velocity
> >at aphelion, and approximate current distance from the Sun. I'd
> >appreciate any help in this.
> >Thanks,
> >Tony
> >
> >
> >
> >
> >
> >
> >NOTICE: Material quoted or re-posted from the Comets Mailing List
should be indicated by:
> >
> >Comets Mailing List [date]
> >http://www.yahoogroups.com/group/comets-ml