Re: Starlink 4 elset estimate

From: Gavin Eadie via Seesat-l <seesat-l_at_satobs.org>
Date: Thu, 13 Feb 2020 14:32:32 -0500
Should we agree on one numbering scheme for Starlink launches, or should
we not care because nobody is really confused by having two!?

This is the 5th Starlink launch and will raise the total number of Starlink 
satellites to 300. Is it called "STARLINK 4" in Marco's TLE because the
first launch carried 60 satellites that were experimental, non-production 
versions, and so that was "STARLINK 0"?


T.S. Kelso just Tweeted, "Pre-launch SupTLEs for the fifth Starlink launch 
("STARLINK-5") are now available on CelesTrak at

     http://www.celestrak.com/NORAD/elements/supplemental/starlink-5.txt

These are for the next planned launch attempt on Feb 15 at 1546 UTC."


After launch, when things settle down, the objects' TLEs get names like 
"STARLINK-1175" which is, I assume, just an ascending count.


SpaceX’s press kits are no help, they just say "fourth launch" etc!

Apologies if this has been hashed out already, or if it is a contentious subject .. 

> On Feb 13, 2020, at 8:45 AM, Marco Langbroek via Seesat-l <seesat-l_at_satobs.org> wrote:
> 
> 
> SpaceX expects to launch the 4th batch of 60 new Starlink satellites from SLC-40
> in Florida on Feb 15 at 15:46 UT
> 
> Here is an estimated elset for the first few revolutions:
> 
> STARLINK 4
> 1 70000U 20999A   20046.65694445 0.00069181  00000-0  15681-3 0    03
> 2 70000  53.0052 278.7576 0009048 332.8942  43.4811 15.96737629    04
> 
> Time uncertainties can be up to 2-3 minutes.
> 
> - Marco

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Received on Thu Feb 13 2020 - 13:33:32 UTC

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