Re: Re: UNID´s 2015 Apr 08 and 09 IDed

From: Leo Barhorst via Seesat-l <seesat-l_at_satobs.org>
Date: Thu, 9 Apr 2015 16:42:56 +0200
Hello Jon and Cees,

I´ve checked on the older IGS and r/b and on Jon´s estimated orbits.

Satfit gives:
15-589A
IGS 2  29393  155.450  104.228    0.515 15-598A  217.939
IGS 5  36104  -15.378   -0.164    0.015 15-598A    1.019
IGS 7A 37954  310.701    0.608    0.005 15-598A    1.009
IGS 8A 39061 -226.598  110.256    0.482 15-598A  215.996
DEMO   39062   22.928 -248.593    0.526 15-598A  235.935
IGS 9  40381 no TLE in classfd
IGS 10 40538 -215.915    3.838    0.004 15-598A    1.040

Jon´s estimated orbits
IGS 9rb71003 -160.317    3.961    0.005 15-598A   66.689
IGS 9  71002  161.286    4.882    0.005 15-598A   66.689
IGS10rb70008 -176.571    4.836    0.009 15-598A   13.854
IGS 10 70007 -184.248    5.394    0.011 15-598A   13.839


15-589B
71003  123.272    0.103    0.019 15-598B   66.702
71002   85.555    1.057    0.015 15-598B   66.702
70008  107.296    0.641    0.033 15-598B   13.867
70007   99.817    1.872    0.005 15-598B   13.852
40539  -42.576    1.168    0.007 15-598B    1.000
40538   68.347   -0.037    0.017 15-598B    1.05
39062  -45.666 -247.917    0.736 15-598B  235.948
39061 -293.106  110.698    0.674 15-598B  216.009
36105  -21.706   22.997    0.037 15-598B    1.075
36104  -90.580   -4.978    0.048 15-598B    1.032
29393   87.368  104.882    0.719 15-598B  217.952

So 15-589A could also be IGS 7A 37954 or IGS 5 36104
and 15-589B fits well on IGS 10 r/b 70007 as well 40539

Iḿ still no sure what sat I´ve imaged last night.
It sure looks like IGS objects. They were both bright and S.

Regards,
Leo


2015-04-09 15:47 GMT+02:00 Jon . via Seesat-l <seesat-l_at_satobs.org>:
> Hi all;
>
> <Hi Leo,
>
> Your identifications of IGS 10 and its rocket may in fact belong to
> IGS 9, which (as Jon reminded us), targeted the same plane. Given that
> the IGS 10 orbits are only a day old, I would find it odd that they
> are off by 3.838 and 1.168 degrees in RAAN.
>>
>
> Did not publish my estimations on Seesat.
>
> Here my estimations before launch of IGS-9 and IGS-10 (Opt-5):
>
> IGS-9 (Single Radar payload):
>
> IGS 9 payload                                            505 X 511 km
> 1 71002U 15602A   15032.22709490 0.00030000  00000-0  00000+0 0    05
> 2 71002  97.5051 104.2119 0004046 301.2708  29.2542 15.18152820    09
>
> IGS 9 rocket                                             426 X 518 km
> 1 71003U 15603A   15032.22709490 0.00070000  00000-0  00000+0 0    01
> 2 71003  97.4511 104.2022 0067098 145.2888 190.6828 15.29983957    09
>
> (Probably the UNIDs of Leo, can´t check it right now) (Great catch Leo!!).
>
>
> IGS-10 (IGS Opt-5) and its rocket:
>
>
> IGS 10 estimation                                        481 X 488 km
> 1 70007U 15507A   15085.07778935 0.00000000  00000-0  00000+0 0    01
> 2 70007  97.3059 156.2017 0005474 356.6819 239.9017 15.25854477    08
>
> IGS 10 rocket                                            460 X 554 km
> 1 70008U 15508B   15085.06251157 0.00005000  00000-0  00000+0 0    09
> 2 70008  97.3006 156.1277 0067938 323.0338 190.8224 15.18455430    08
>
> Current classfd.tle elets are:
>
> IGS Opt 5
> 1 40538U 15015A   15097.87675917 0.00000000  00000-0  00000-0 0    07
> 2 40538  97.5000 170.3136 0003000 139.2057 220.7941 15.17587539    00
>
> IGS Opt 5 r
> 1 40539U 15015B   15097.92989755 0.00012000  00000-0  42687-3 0    05
> 2 40539  97.2667 169.8982 0013496  45.8707 314.1291 15.28925613    00
>
> As you can see they were launched on same descending node (RAAN).
>
> Although there are on different altitudes the inclination is a little bit
> different so both drift on RAAN to about 0.9881 deg/day.
>
> I am very very happy to be right on both estimations!
>
>
> Jon.
>
>
> --
> Jon, COSPAR 6242, 42.9453, -2.82839, 623m, Bitoriano, Basque Country.
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Received on Thu Apr 09 2015 - 09:43:32 UTC

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