New Inspiration 4 estimated elsets

From: Marco Langbroek via Seesat-l <seesat-l_at_satobs.org>
Date: Wed, 15 Sep 2021 22:52:40 +0200
New information suggests a launch into a 190 x 575 km elliptical orbit, followed
by a circularization burn at apogee.

That would yield something like these two elsets (which are for launch on 16 Sep
at 00:02 UT, the opening of the launch window):

INSPIRATION4  rev 1            for launch on 16 Sept 2021 00:02:00 UT
1 70004U 21999A   21259.00138889  .00000000  00000-0  00000-0 0    00
2 70004 051.6000 251.1887 0284737 048.1748 324.5345 15.61785606    01

INSPIRATION4  post-circ        for launch on 16 Sept 2021 00:02:00 UT
1 70005U 21999A   21259.00138889  .00000000  00000-0  00000-0 0    01
2 70005 051.6000 251.2407 0003597 047.8286 333.3751 14.98186673    04


The first elset is for immediately after orbit insertion: the second
post-circularization elset would be valid post ~01:00 UT.

Note that you can easily adjust these elsets to any other launch time using my
"TLE from Proxy" software which you can find at http://software.langbroek.org

(the launch is in the middle of the night for me, so I will not be immediately
available myself to produce new elsets if the launch is later than 00:02 UT)

If Inspiration4 launches close to opening of the launch window, the orbital
plane will be similar to that of the ISS (the ISS orbital plane passes over the
launch site at 23:54 UT on Sep 15, 8 minutes before launch).

The ISS itself will pass near the launch site at 00:11:40 UT, around the time of
orbit insertion of Inspiration 4 if launch is at 00:02 UT), so if it does launch
right at the opening of the window, the launch will be visible from the ISS.

- Marco

----
Dr Marco Langbroek

e-mail:    marco_at_langbroek.org
web:       www.langbroek.org
Twitter:   _at_Marco_Langbroek
----
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Received on Wed Sep 15 2021 - 15:53:50 UTC

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