RE: Looks like I observed OTV = short time

From: Ted Molczan via Seesat-l <seesat-l_at_satobs.org>
Date: Fri, 8 Aug 2014 21:58:21 -0400
Kevin Fetter wrote:

> Tonight, I sat outside, and looked for it.
> 
> I noticed a bright sat, and tried to place it, in the feild of view. I managed to do that,
> shortly before my veiw was block.
> 
> At around 1:15:35 utc ( Aug 9 ) it passed roughly 1 degrees of Enif, which is located at
> 
> Right ascension: 21h44m11.1887s
> Declination: +09 52' 30.065"

Treating the star's coordinates as the approximate satellite position and adding the pseudo-obs to Alberto Rango's
earlier obs yields:

1 70000U          14221.03568785  .00000000  00000-0  00000-0 0    02
2 70000  43.5000 170.7940 0020000  53.6060 306.6658 15.73260164    00

I propagated the last known orbit (epoch 14216.09424805) to the time of the new obs, and fixed all but mean anomaly and
mean motion.

Tonight, expect cross-track errors of at least 1 deg at high elevation and time errors of at least 10 s.

My first impression is that it may not have manoeuvred lower, but simply stopped maintaining the orbit against drag.

Ted Molczan


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Received on Fri Aug 08 2014 - 20:58:55 UTC

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