Re: Ofeq 10 launched

From: Jonathan McDowell via Seesat-l <seesat-l_at_satobs.org>
Date: Thu, 10 Apr 2014 10:37:43 -0400
Launch was apparently at 19:06 UTC per the superimposed clock on the
official video at https://www.youtube.com/watch?v=IHi7SVYdzDA

On 10 April 2014 09:46, Ted Molczan via Seesat-l <seesat-l_at_satobs.org> wrote:
> Jonathan McDowell wrote:
>
>> Apologies for the incorrect subject on the previous email.
>> I wrote:
>> >  The Israeli radar satellite Ofeq-10 was launched from Palmachim at
>> > 1915 UTC Apr 9 to a 600 km orbit presumably at around 142 degrees
>> > inclination - since Space-Track has classified Israeli military
>> > satellite TLEs, it's up to the hobbyist community to locate this one.
>> > Ted, any chance of guessed TLEs?
>> My own feeble attempt at an estimated TLE, based on launch at 1915 UTC
>> and perigee raise at first apogee around 2004 UTC is
>>
>> 1 39650U 14019A   14099.83611111 0.00000000 +00000-0 +00000-0 0    17
>> 2 39650 141.8200 211.2300 0000000 307.4000 285.3000 14.89198295     9
>
> I found a few news reports claiming a 600 km orbit with the inconsistent period of 99 min. My guess is that the only
> reliable information is 600 km, and that it is more likely to be the very rough apogee of a not too circular orbit, say
> 400 x 590 km. Consider that Tecsar 1's initial orbit was 406 X 583 km.
>
> Defense Update has this report, which says nothing about the orbit, but states launch time as 20:15 UTC:
>
> http://defense-update.com/20140409_israel-launches-ofeq-10-spy-satellite.html
>
> Assuming launch at 19:15 UTC, the orbit might look like this:
>
> Ofeq 10 guess                                            401 X 592 km
> 1 70000U          14099.92446554  .00000000  00000-0  00000-0 0    02
> 2 70000 141.7700 211.7900 0139000  47.0000 314.6161 15.24000000    07
>
> I can imagine it even lower, perhaps something like this:
>
> Ofeq 10 guess                                            347 X 592 km
> 1 70000U          14099.92446553  .00000000  00000-0  00000-0 0    01
> 2 70000 141.7700 211.7900 0179000  47.0000 314.6161 15.33000000    01
>
> If the launch was an hour later, then add 0.04166667 d to the epoch and 15.041 deg to the RAAN of the above TLEs.
>
> Ted Molczan
>
>
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Received on Thu Apr 10 2014 - 09:38:28 UTC

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