Re[2]: Flock 2B 2 (40951) Reentry Seen from Southern England, UK

From: Karl Antier via Seesat-l <seesat-l_at_satobs.org>
Date: Thu, 06 Oct 2016 11:10:24 +0000
Hi Adam and all,

For your information, some videos have been made from the object 
reentry.
You can find some of them here : 
https://www.flickr.com/photos/66996725_at_N00/30074026625/
Other pictures, taken from Savigny-le-Temple (in France) are also 
available on REFORME website.
You can find all of them here: 
http://www.reforme-meteor.net/rentree-atmospherique-au-dessus-de-langleterre-et-de-la-normandie-10102016-18h44-tu/
Those videos will be much more accurate in determining the object 
trajectory than the one which is deducted from visual observations (made 
for most of them by people who have small experience in astronomy).

If you need any further information, please ask!
Best regards and clear skies!
Karl


------ Message d'origine ------
De: "Adam Fritzler via Seesat-l" <seesat-l_at_satobs.org>
À: "Seesat-L" <seesat-l_at_satobs.org>
Envoyé : 05/10/2016 18:06:02
Objet : Re: Flock 2B 2 (40951) Reentry Seen from Southern England, UK

>Hi -- Planet happens to be my employer. It is *incredible* that this 
>was
>visible! I just wanted to note that this matches our 
>internally-generated
>data, which include contributions from UHF ranging. Unfortunately our 
>last
>fit for this satellite is from a day before the re-entry event, which
>predicts re-entry a few hours later:
>
>0 FLOCK 2B-2 0C18
>1 83096U FPP2     16276.75001157  .00000000  00000+0  60092-3 0    08
>2 83096 051.6001 186.9102 0008827 222.8676 053.8809 16.39049103    05
>
>The IMO map with our predicted track added, courtesy of Cyrus Foster, 
>who
>does our orbits work:
>   http://satobs.org/seesat_ref/misc/0C18_reentry_map.png
>
>Our most recent ephemerides are always available here:
>http://ephemerides.planet-labs.com/
>
>Cheers,
>Adam.
>
>
>On Mon, Oct 3, 2016 at 4:38 AM, C. Bassa via Seesat-l 
><seesat-l_at_satobs.org>
>wrote:
>
>>  William shared the video, and from it I obtained the following
>>  measurements:
>>
>>  99999 16 776A   9004 G 20161002184350520 17 25 1711401+162553 39 S
>>  99999 16 776A   9004 G 20161002184351520 17 25 1724505+163473 39 S
>>  99999 16 776A   9004 G 20161002184352520 17 25 1736750+164397 39 S
>>  99999 16 776A   9004 G 20161002184353520 17 25 1750216+164502 39 S
>>  99999 16 776A   9004 G 20161002184354520 17 25 1804428+163487 39 S
>>  99999 16 776A   9004 G 20161002184355520 17 25 1818432+162045 39 S
>>  99999 16 776A   9004 G 20161002184356520 17 25 1831986+155650 39 S
>>  99999 16 776A   9004 G 20161002184357520 17 25 1846594+152635 39 S
>>  99999 16 776A   9004 G 20161002184358520 17 25 1901101+145608 39 S
>>  99999 16 776A   9004 G 20161002184359500 17 25 1914563+141116 39 S
>>  99999 16 776A   9004 G 20161002184400520 17 25 1928409+132422 39 S
>>  99999 16 776A   9004 G 20161002184401520 17 25 1940494+123416 39 S
>>  99999 16 776A   9004 G 20161002184402520 17 25 1951782+113908 39 S
>>  99999 16 776A   9004 G 20161002184403140 17 25 1957107+110316 39 S
>>
>>  Site 9004 is at 1.8017W, 51.3521N, 133m.
>>
>>  Fitting a circular orbit gives this result.
>>
>>  1 99999U 16776A   16276.78051887  .00000000  00000-0  50000-4 0    00
>>  2 99999  51.7221 184.2405 0001000   0.0000 100.3776 16.66450838    01
>>  # 20161002.78-20161002.78, 14 measurements, 0.478 deg rms
>>
>>  Clearly it fits the ISS inclination, though the RAAN is at least 2 
>>deg
>>  smaller. Since the field-of-view of the camera was 100x55 deg, there
>>  likely is unmodelled distortion, resulting in systematic offsets in
>>  the positions.
>>
>>  Regards,
>>      Cees
>>  _______________________________________________
>>  Seesat-l mailing list
>>  http://mailman.satobs.org/mailman/listinfo/seesat-l
>>
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Received on Thu Oct 06 2016 - 06:11:11 UTC

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