Misidentification corrected Re: Photo Dragon debris

From: Marco Langbroek via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 21 Apr 2014 13:49:17 +0200
Marco Langbroek via Seesat-l schreef op 20-4-2014 15:20:
>
> Hi all
>
> Yesterday in late twilight near 20:07 UT I observed the Dragon CRS-3 chasing the
> ISS by about one minute, and also a 3rd object related to the Dragon launch,
> 2013-022C/39682, a few minutes earlier.


It turns out I misidentified this piece as well as the other piece which I 
reported in another e-mail.

I had not realized the very large influence of element epoch in this case even 
after less than a day. After astrometrically measuring the images and picking 
orbital elements for each piece with epoch closest to the time of observation, I 
got much better fits and a change of ID's:

1) The piece I imaged near 20:02:52 UT (epoch 1409.835) is not piece C,
    but piece H (39687).
    * residuals -2.58s, 0.07 x-track, element epoch 14110.19535714

2) The piece I imaged near 20:04:07 UT (epoch 1409.836) is not piece H,
    but piece G (39686).
    * residuals -3.57s, 0.04 x-track, element epoch 14110.25921489


39687 14 022H   4353 G 20140419200254000 17 75 0732322-031110 56  (+/- 1 sec)
39686 14 022G   4353 G 20140419200412300 17 75 0833048-075620 56

These two pieces are likely the solar panel covers.

- Marco


-----
Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
e-mail: sattrackcam_at_langbroek.org

Cospar 4353 (Leiden):   52.15412 N, 4.49081 E (WGS84), +0 m ASL
Cospar 4354 (De Wilck): 52.11685 N, 4.56016 E (WGS84), -2 m ASL
Cospar 4355 (Cronesteyn): 52.13878 N, 4.49937 E (WGS84), -2 m ASL
Station (b)log: http://sattrackcam.blogspot.com
Twitter: @Marco_Langbroek
-----
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Received on Mon Apr 21 2014 - 06:50:05 UTC

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