RE: Need TLE for Falcon R/B

From: Ted Molczan via Seesat-l <seesat-l_at_satobs.org>
Date: Tue, 9 Mar 2021 14:10:52 -0500
Thank you, Adam, for bringing this to our attention.

I should mention that due to the high rate of decay, and the approximate nature of the elements,
the prediction time uncertainty after 24 h is at least +/-7 minutes.

Happy hunting!
Ted Molczan

> -----Original Message-----
> From: Seesat-l <seesat-l-bounces+tedmolczan=rogers.com_at_satobs.org> On Behalf Of Limax7 via
> Seesat-l
> Sent: March-09-21 1:12 PM
> To: Ted Molczan <ssl3molcz_at_rogers.com>
> Cc: Seesat-L <seesat-l_at_satobs.org>
> Subject: Re: Need TLE for Falcon R/B
>
> Hi
> Great work Ted :) Now we can track it!
> Very very thanks!
>
> Adam
>
> wt., 9 mar 2021 o 18:48 Ted Molczan via Seesat-l <seesat-l_at_satobs.org>
> napisaƂ(a):
> >
> > With Adam Hurcewicz's help, I have derived approximate elements of what appears to be the
> Falcon 9 rocket body of the 2021-017 launch.
> >
> >                                                          281 X 282 km
> > 1 92004U 21565A   21065.16791667  .01845038  00000-0  40100-2 0    00
> > 2 92004  52.9988 175.9979 0001000   0.0000  71.9086 15.97575395    03
> >
> > Methodology
> >
> > I reduced two positions, separated in time by 1.1 minutes, from a video shot by a
> different observer on 6 March 2021 5:03 local time (4:03 UTC):
> >
> > https://youtu.be/rKyTjz-E0FQ
> >
> > Adam contacted the observer and obtained accurate location co-ordinates. I failed to
> request permission to publish the name of the observer or the co-ordinates.
> >
> > I identified a known satellite in the video, which enabled me to estimate that it begins
> at 04:00:12 UTC.
> >
> > The above elements are a circular orbit approximation. The decay term is a trial and error
> fit to approximate the time and track on the video Adam shot this morning:
> >
> > https://youtu.be/JdbWWKalPwg
> >
> > Ted Molczan
> >
> >
> >
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Received on Tue Mar 09 2021 - 13:11:58 UTC

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