(no subject)

From: Leo Barhorst via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 14 Mar 2016 11:40:15 +0100
The launch of Exomars was on time at 09:31:42 UT.
Watched it on ESA TV.


Regards
Leo


2016-03-14 10:28 GMT+01:00 C. Bassa via Seesat-l <seesat-l_at_satobs.org>:

> At 09:31UT, a Proton-M with a Briz-M upper stage will launch the
>
> ExoMars-2016 mission.
> The mission will follow the typical Briz insertion profile of 4 burns
> with intermediate orbits. I have not been able to find exact
> information about the burn profile. Approximate information is
> provided at these two links:
> http://www.russianspaceweb.com/exomars2016-launch.html
>
> http://blogs.esa.int/rocketscience/2016/03/13/why-exomars-ride-to-space-takes-the-time-it-does/
>
> Using that information, I estimate the following TLEs:
>
> Parking orbit
> 1 85001U          16074.39701389  .00000000  00000-0  50000-4 0    04
> 2 85001  51.5500 323.0000 0000000   0.0000  50.0000 16.36550117    00
> Intermediate orbit
> 1 85002U          16074.46527778  .00000000  00000-0  00000-0 0    02
> 2 85002  51.5500 323.0000 2951143  90.0000   0.0000  9.52124987    02
> Transfer orbit
> 1 85003U          16074.57013889  .00000000  00000-0  00000-0 0    08
> 2 85003  51.5500 323.0000 6101816  90.0000   0.0000  3.91570020    01
> Earth escape orbit
> 1 85004U          16074.82638889  .00000000  00000-0  00000-0 0    00
> 2 85004  51.5500 323.0000 9186763  90.0000 359.0000  0.37311395    01
>
> The 85001 elset is valid from 09:31 to 11:10UT. Then the 85002 elset
> should be used until it reaches perigee at 13:41UT. After that the
> 85003 elset is valid until the 19:50UT perigee. After that the 85004
> elset is approximate; ExoMars will be on a hyperbolic orbit with
> respect to the Earth, but since two-line-elements only support
> eccentric orbits the 85004 elset will only be valid for the first few
> hours after the 4th Briz-M burn.
>
> ExoMars will be visible in the transfer orbit (85003) from Australia,
> and then shortly after the last Briz-M burn from the European and
> African continents. Note that the elements above are very approximate,
> so allow for large offsets in time and position. If more information
> about the orbits becomes available I will try to provide updated orbits.
>
> Regards,
>    Cees
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Received on Mon Mar 14 2016 - 05:40:42 UTC

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