1/x
Navigational Warnings have appeared that suggest a #test launch of a #Minuteman #ICBM from Vandenberg on March 3 - 4.

(I suspect 1 or 2 more NavWarnings to appear for areas around Kwajalein, based on previous tests)
@nukestrat @mhanham @wslafoy @ArmsControlWonk ImageImage
2/x
To be clear (as such suggestions always arrise):
This has *nothing* to do with the Ukraine crisis. Tests like these are scheduled months in advance.
They are regular tests to ascertain the readiness and training of missile crews.
3/x
As I expected, another Navigational Warning has appeared, adding an extra hazard area west of Kwajalein.
Updated map for this upcoming #Minuteman III test (probably GT240GM): ImageImage
4/x
In terms of what these hazard zones represent, this is my interpretation (but I am open to informed suggestions otherwise): Image
5/x
Some interesting OSINT sleuthing with the help of @wslafoy at the moment.
Basically, documents suggest the RV impact either at Illeginni Island on the Kwajalein Atol, or in deep Ocean *east* of it. The 3rd stage and PB vehicle should end up *east* of Kwajalein as well.
6/x
So the area *west* of Kwajalein remains a bit of a mystery.
Also, going back to previous Minuteman III test I've mapped, quite some variation in areas around Kwajalein.
7/x
Interesting patterns.... Image

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More from @Marco_Langbroek

Oct 17, 2021
1/x
(lange) draad:
Het gaat véél verder dan een "hypersonische raket": de Fin. Times claimt dat de Chinese test een test voor FOBS betrof...

FOBS staat voor "Fractional Orbital Bormbardment System". FOBS lanceer je niet op een ballistisch traject zoals een normale ICBM, (cont.)
2/x
...maar worden echt in een baan om de aarde gebracht, zoals een satelliet. Waarna op een gegeven moment met een deorbit burn door een retroraket, de lading weer omlaag wordt gebracht, boven het doelwit.
Welnu: waarom zou je dit zo doen in plaats van een normale ICBM lanceren?
3/x
Het voordeel van FOBS is dat het je toestaat toe te slaan vanuit richtingen die met gewone ICBM's niet worden verwacht. Via een traject over de zuidpool bijvoorbeeld. Dan benader je de VS (het doelwit) vanuit het zuiden (gele lijn), terwijl
Read 26 tweets
Oct 16, 2021
1/x
It is with great pleasure that I can announce that the Working Group on Small Body Nomenclature of @IAU_org has decided that asteroid (563318) will henceforth be named:

(563318) ten Kate

After the Dutch @UniUtrecht astrobiologist/planetary scientist Dr @ingeloes ten Kate
2/x
The naming citation for (563318) ten Kate was published yesterday in IAU-WGSBN Bulletin vol 1. nr 10, p 7:
wgsbn-iau.org/files/Bulletin…
3/x
Dr Inge Loes ten Kate is a well know researcher into the processes that brought carbon to Mars, through Carbonaceous meteorites and their degradation in the Martian environment, with a focus on the potential creation of Martian environments suitable for (simple) life.
Read 6 tweets
Aug 6, 2021
1/x
A curious Navigational Warning has appeared for what appears to be a series of Space Debris deorbits.
The areas point to deorbit from a ~51-53 degree inclined set of orbits.
#Starlink mass #deorbit?
Some areas line up with ISS passes in the two time windows given, but (cont.)
2/x
(cont.) but AFAIK nothing will leave the ISS between now and August 10. And the areas south of Alaska do not line up with ISS groumndtracks in the given two time windows.
So my guess is multiple #Starlink deorbits (but I might be wrong).
3/x
Story consolidated in a new blogpost:
sattrackcam.blogspot.com/2021/08/a-weir…
Read 6 tweets
Aug 4, 2021
The #Proton-M third stage from the #Nauka launch is now coming down faster and faster.
Current prediction models place reentry within 2 days from now, either late August 5 or early August 6, with the trend in predictions tending towards August 5.
@SSC_NL ImageImage
These reentry forecasts are also on my blog:
sattrackcam.blogspot.com/2021/08/proton…
The #Proton-M third stage from the #Nauka launch now has less than one day left in orbit. Current model forecasts suggest a reentry in the morning of August 6 UT. ImageImage
Read 10 tweets
Jun 27, 2021
1/x
Navigational Warnings have appeared for the @VirginOrbit "Tubular Bells part I" launch on June 30 (a LauncherOne rocket launched from the 'Cosmic Girl' aircraft).
This launch includes #BRIK-II, the first Dutch military satellite, launched for the Royal Netherlands Air Force. ImageImageImageImage
2/x
"BRIK-II" is a 6U cubesat (about 60 x 30 x 20 cm, 10 kg).
It is named after the very first aircraft, named 'Brik', of the RNLAF predecessor in 1913-1916. It is also the name for a brick, hence the mission patch
(photo of original Brik aircraft: NL Inst. for Military History) ImageImage
3/x
The small experimental BRIK-II satellite includes equipment for communication, for monitoring "Space Weather", and for ELINT.
It was built by @isis_space ImageImage
Read 5 tweets
May 8, 2021
1/x
Updated map, showing the trajectory of the Chinese #CZ5B rocket (blue lines) over the uncertainty interval in the latest TIP of CSpOC, the US military tracking network.
Within the 12 hr wide uncertainty window, it can fall anywhere on these blue lines.
2/x
Also shown are cities with populations of 1 million or more in the relevant area between 41.5 N and 41.5 S
3/x
The rocket is steadily coming down, last orbital determination has the highest point in the elliptical orbit (the so called apogee, blue) at about 218 km, the lowest point (perigee, red) at about 146 km.
Read 5 tweets

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