SatTrackCam Leiden (b)log

THE SECRET SPIES IN THE SKY - Imagery, Data Analysis, and Discussions relating to Military Space

SatTrackCam Leiden (Cospar 4353) is a satellite tracking station located at Leiden, the Netherlands. The tracking focus is on classified objects - i.e. "spy satellites". With a camera, accurate positional measurements on satellites of interest are obtained in order to determine their orbits. Orbital behaviour is analysed. This blog analyses Missile tests too.

Friday, 14 November 2025

BRIK-II is no more

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On 12 November 2025, the Netherlands' first military satellite , the 6U cubesat BRIK-II (2021-058F), reentered into the atmosphere aft...
Monday, 20 October 2025

[MULTIPLE UPDATES] Possible Space Debris found near Newman, Australia on Oct 18, might be Jielong 3 upper stage remains

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click map to enlarge On 18 October 2025 near 14:00 local time (= 18 October ~6:00 UTC), a strange object was found  on or near a dirtroad i...
Friday, 17 October 2025

[UPDATED] Identifying a reentry over the Canary Islands on 16 October as the reentry of the Chinese satellite Xinjishu Yanzheng 7 (XJY-7)

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click to enlarge In the early local morning of 16 October 2025 around 1:56 UTC , a spectacular phenomena appeared in the sky over Tenerife ...
Monday, 22 September 2025

A Trident-II D5 SLBM launch in the Atlantic on 21 September 2025: analysis of footage from Puerto Rico (UPDATED)

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frame stack of movie by SAC station Anasco, Puerto Rico   click map to enlarge On 15 September 2025, Navigational Warnings appeared that poi...
Sunday, 24 August 2025

X-37B OTV 8 and Limasat (the USSF-36 payloads) imaged

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  This morning (early 24 August 2025) weather finally cooperated and I managed to observe both of the USSF-36 payloads, two days after lau...
Saturday, 23 August 2025

X-37B Spaceplane mission OTV 8 located on orbit

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OTV 8 imaged by Kevin Fetter 5 hours after launch. Image (c) Kevin Fetter, used with permission OTV 8 , the 8th mission of the US Space Forc...
Monday, 18 August 2025

An upcoming Hypersonic Missile Test (repeat of FT-3) from Kodiak to Kwajalein [UPDATED]

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Click map to enlarge Navigational Warnings have been published that point to a Hypersonic Missile Test (a repeat of the failed FT-3 from ...
Sunday, 17 August 2025

The upcoming launch of the X-37B Spaceplane mission OTV 8

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X-37B mission OTV 6 after landing (Image: US Air Force) Navigational Warnings have appeared for OTV 8 , the 8th launch of the secretive  X-...
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About the Author

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SatTrackCam Leiden
Dutch, 55, Lecturer in optical Space Situational Awareness at Delft University of Technology, Faculty of Aerospace Engineering, the Netherlands. Former stone age archaeologist (PhD). Also a meteoriticist and asteroid discoverer.
Asteroid (183294) Langbroek was named after me. In 2012, I received the Dr. J. van der Bilt Prize of the Royal Dutch Astronomy Association (KNVWS) for my work on meteors, asteroids and satellites.Opinions expressed on this blog are entirely my own, not those of my employer.
You can find me on Twitter via @Marco_Langbroek and at BlueSky as @marcolangbroek.bsky.social

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