Starlink 7 estimated elsets, June 4

From: Marco Langbroek via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 1 Jun 2020 18:47:24 +0200
Starlink 7 (I am stubbornly keeping with the original count in which the first
launch is launch 0.1) now appears to be slated for June 4, with a backup on June
5, based on Navigational Warnings and 45 Weather Squadron launch forecasts.

I can't find anything on the SpaceX website yet though about date or launch
time. It seems SpaceX becomes less and less informative about their launches.

The Navigational Warning window for June 4 is 00:50 UT to 02:48 UT

The weather forecast from 45 Weather Squadron currently lists 00:55 - 01:56 UT
as launch interval. (https://www.patrick.af.mil/About-Us/Weather/)


Estimated elsets for start- mid- and end- times of the Navigational Warnings
window (June 4 UT):


STARLINK 7                                     for launch at 00:50 UT
1 70000U 20999A   20156.03472222  .00000000  00000-0  00000-0 0    05
2 70000 053.0000 162.2833 0117009 047.3726 323.7776 15.95113134    07


STARLINK 7                                     for launch at 01:49 UT
1 70004U 20999A   20156.07569444  .00000000  00000-0  00000-0 0    06
2 70004 053.0000 177.0736 0117009 047.3726 323.7776 15.95113134    07


STARLINK 7                                     for launch at 02:48 UT
1 70005U 20999A   20156.11666667  .00000000  00000-0  00000-0 0    07
2 70005 053.0000 191.8640 0117009 047.3726 323.7776 15.95113134    06



Estimated elsets for start- mid- and end- times of the 45th Weather Squadron
listed window (June 4 UT):


STARLINK 7                                     for launch at 00:55 UT
1 70001U 20999A   20156.03819444  .00000000  00000-0  00000-0 0    07
2 70001 053.0000 163.5367 0117009 047.3726 323.7776 15.95113134    04


STARLINK 7                                     for launch at 01:25 UT
1 70002U 20999A   20156.05902778  .00000000  00000-0  00000-0 0    03
2 70002 053.0000 171.0572 0117009 047.3726 323.7776 15.95113134    07


STARLINK 7                                     for launch at 01:56 UT
1 70003U 20999A   20156.08055555  .00000000  00000-0  00000-0 0    09
2 70003 053.0000 178.8284 0117009 047.3726 323.7776 15.95113134    03


Launch times up to 1:30 UT would result in visibility from Europe on the first
pass, as well as on successive nights when the 'train' forms.

When a more pertinent launch-time becomes available, I'll update.

Meanwhile, note that you can easily produce an elset for any new launch time
from one of te above elsets using my "TLE from Proxy" program, available on my
software website: http://software.langbroek.org

As a note: there is an interesting aspect to the Navigational Warning for the
Falcon 9 upper stage (first of the two Navigational Warnings below).

It lists a secondary area, almost completely within the first area, which is odd:


301253Z MAY 20
NAVAREA XII 226/20(21,22,83).
EASTERN PACIFIC.
1. HAZARDOUS OPERATIONS, SPACE DEBRIS
   040217Z TO 040334Z JUN, ALTERNATE
   050155Z TO 050312Z JUN IN AREAS BOUND BY:
   A. 16-21S 137-47W, 09-14S 134-53W,
      01-02N 127-55W, 09-57N 121-33W,
      16-19N 114-48W, 15-16N 113-01W,
      07-44N 116-14W, 01-47S 122-06W,
      10-25S 127-55W, 17-48S 135-31W.
   B. 11-30N 120-00W, 03-30N 120-00W,
      03-30N 126-14W, 09-57N 121-33W.
2. CANCEL NAVAREA XII 223/20.
3. CANCEL THIS MSG 050412Z JUN 20.


301236Z MAY 20
NAVAREA IV 459/20(11,26).
WESTERN NORTH ATLANTIC.
FLORIDA.
1. HAZARDOUS OPERATIONS, ROCKET LAUNCHING
   040050Z TO 040248Z JUN, ALTERNATE
   050028Z TO 050226Z JUN
   IN AREAS BOUND BY:
   A. 28-36-55N 080-36-00W, 28-48-00N 080-24-00W,
      28-54-00N 080-17-00W, 29-17-00N 079-49-00W,
      29-15-00N 079-46-00W, 28-41-00N 080-17-00W,
      28-34-00N 080-25-00W, 28-31-00N 080-31-00W,
      28-30-25N 080-33-00W.
   B. 31-58-00N 076-58-00W, 33-09-00N 075-58-00W,
      33-23-00N 075-36-00W, 33-23-00N 074-56-00W,
      33-15-00N 074-37-00W, 32-48-00N 074-35-00W,
      32-29-00N 074-59-00W, 31-40-00N 076-42-00W.
2. CANCEL NAVAREA IV 451/20.
3. CANCEL THIS MSG 050326Z JUN 20.



- Marco



-----
Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
e-mail: sattrackcam_at_langbroek.org

Station (b)log: http://sattrackcam.blogspot.com
Twitter: _at_Marco_Langbroek
-----


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Received on Mon Jun 01 2020 - 11:48:18 UTC

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