Tuesday, 10 January 2023

The reentry of the second stage of LauncherOne "Start me Up" seen from Lanzarote

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(footage by Ramón López,SPMN Lanzarote) The footage above was filmed last night near 23:19 UTC (Jan 9) by one of the Spanish SPMN's met...
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Sunday, 8 January 2023

A first launch to orbit from Northwest Europe on January 9 [UPDATED]

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click image to enlarge   If there are no launch delays, Virgin Orbit will conduct the first ever launch to orbit from Northwest Europe on ...
Saturday, 7 January 2023

2022 at a Glance

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the astrometric positions I obtained in 2022 plotted on a starmap   The plot above shows you 2022 at a glance: all 938 positional measuremen...
Wednesday, 12 October 2022

The North Korean Medium Range Missile test of October 3rd

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click to enlarge On October 3rd (October 4th local time in Korea) at 22:22 UTC, North Korea launched an MRBM from Mupyong-ri. They fired i...
Tuesday, 4 October 2022

PAN is moving back westwards again

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  click diagram to enlarge In September 2021 I wrote a blogpost noting that the enigmatic geosynchronous SIGINT satellite PAN/NEMESIS I (2...
Monday, 3 October 2022

A pass of China's Space Plane

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click to enlarge   China's experimental Space Plane , 2022-093A, imaged over the roof of my house in Leiden in the evening of  October ...
Sunday, 25 September 2022

USA 338, the NROL-91 payload, observed

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NROL-91. Click image to enlarge On 24 September 2022 at 22:25:30 UT , with half an hour delay, ULA launched NROL-91 , a Delta IV Heavy with ...
Wednesday, 21 September 2022

NROL-91: a new (possibly electro-optical) sister ship of USA 290

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  click map to enlarge On 24 September 2022 at 21:53 UT , an ULA Atlas Delta IV Heavy (the last to be launched from Vandenberg) will laun...
Wednesday, 7 September 2022

Kosmos 2558 keeping its orbit close to USA 326 [UPDATED]

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  [updated 9 Sept 2022 20:00 UTC] In a series of previous blogposts ( here , here and here ) I wrote about a cat-and-mouse game going on in...
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Sunday, 14 August 2022

Will China's second 'Space Plane' land on August 15? (UPDATE: No, it didn't)

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Over the past 10 days I have been following the second test flight of China's "Experimental Test Spacecraft" (2022-093A), a....
Saturday, 6 August 2022

The flyby of USA 326 by Kosmos 2558 on August 4: a post-analysis

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click image to enlarge In a previous post I discussed the launch of Kosmos 2558 (2022-089A), a Russian military satellite which was launche...

Observing China's Re-usable Test Vehicle (or "space plane")

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  frame stack. Click to enlarge On August 4 2022 near 16:00 UTC, China launched a CZ-2F from Jiuquan carrying a " re-usable experiment...
Wednesday, 3 August 2022

A stalker and its prey (Kosmos 2558 and USA 326)

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  In my previous post I discussed the newly launched Russian military satellite Kosmos 2558 (2022-089A), that was launched on August 1 int...
Tuesday, 2 August 2022

Kosmos 2558, a Russian inspector satellite targetting the US IMINT satellite USA 326?

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  click image to enlarge On August 1, 2022, at 20:25 UTC, Russia launched a Soyuz 2.1v carrying a military satellite from Plesetsk into a ...
Thursday, 28 July 2022

CZ-5B rocket stage 2022-085B: reentry forecasts

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 (this post is periodically updated when new tracking data become available and have been analyzed) last updated 30 July 19:05 UT    My late...