Marco Langbroek
@marcolangbroek.bsky.social
Lecturer in optical Space Situational Awareness at Delft Technical University, faculty of Aerospace. Spy sats, missiles, meteorites, asteroids. Asteroid (183294). Lapsed Archaeologist (PhD). Rowing. CFS. Opinions my own.
blog: http://sattrackcam.blogspot.c
blog: http://sattrackcam.blogspot.c
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Location at time of observation.
This was a difficult object to model in our reentry model: very eccentric orbit (brief dips below 1540 km), and indications of changing attitude =- changing drag area
Location at time of observation.
This was a difficult object to model in our reentry model: very eccentric orbit (brief dips below 1540 km), and indications of changing attitude =- changing drag area
November 8, 2025 at 1:29 PM
2/x
Location at time of observation.
This was a difficult object to model in our reentry model: very eccentric orbit (brief dips below 1540 km), and indications of changing attitude =- changing drag area
Location at time of observation.
This was a difficult object to model in our reentry model: very eccentric orbit (brief dips below 1540 km), and indications of changing attitude =- changing drag area
November 5, 2025 at 4:56 PM
November 5, 2025 at 3:11 PM
The #UNHA3 upper stage from the #NorthKorean rocket that launched KMS 3-2 in 2012 will have an uncontrolled #reentry today. It is small (2.2 x 1.4m).
Our current Tudat model reentry forecast is 19:21 UTC +- 3.1 h.
Map shows trajectory over window.
Our current Tudat model reentry forecast is 19:21 UTC +- 3.1 h.
Map shows trajectory over window.
November 5, 2025 at 10:24 AM
The #UNHA3 upper stage from the #NorthKorean rocket that launched KMS 3-2 in 2012 will have an uncontrolled #reentry today. It is small (2.2 x 1.4m).
Our current Tudat model reentry forecast is 19:21 UTC +- 3.1 h.
Map shows trajectory over window.
Our current Tudat model reentry forecast is 19:21 UTC +- 3.1 h.
Map shows trajectory over window.
LRPT image from the 15:08 CET pass of the Meteor M2-4 satellite. Nice view of the Alps.
November 4, 2025 at 2:33 PM
LRPT image from the 15:08 CET pass of the Meteor M2-4 satellite. Nice view of the Alps.
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I got a question what all these areas are for. Basically this (see map). The #Minuteman is a 3-stage #missile and can carry multiple reentry vehicles (MIRV).
I got a question what all these areas are for. Basically this (see map). The #Minuteman is a 3-stage #missile and can carry multiple reentry vehicles (MIRV).
November 4, 2025 at 1:16 PM
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I got a question what all these areas are for. Basically this (see map). The #Minuteman is a 3-stage #missile and can carry multiple reentry vehicles (MIRV).
I got a question what all these areas are for. Basically this (see map). The #Minuteman is a 3-stage #missile and can carry multiple reentry vehicles (MIRV).
After two weeks, a lone CSpOC #TIP has just appeared for the Jielong-3 RB 2024-173L, the suspect of the #Newman space #debris find.
18 Oct 2025 4:38 ± 1m UTC near 18 S 121 E.
This fits well with the Newman object being a part of this rocket.
@drspacejunk.bsky.social @planet4589.bsky.social
18 Oct 2025 4:38 ± 1m UTC near 18 S 121 E.
This fits well with the Newman object being a part of this rocket.
@drspacejunk.bsky.social @planet4589.bsky.social
October 31, 2025 at 12:32 PM
After two weeks, a lone CSpOC #TIP has just appeared for the Jielong-3 RB 2024-173L, the suspect of the #Newman space #debris find.
18 Oct 2025 4:38 ± 1m UTC near 18 S 121 E.
This fits well with the Newman object being a part of this rocket.
@drspacejunk.bsky.social @planet4589.bsky.social
18 Oct 2025 4:38 ± 1m UTC near 18 S 121 E.
This fits well with the Newman object being a part of this rocket.
@drspacejunk.bsky.social @planet4589.bsky.social
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Navigational Warnings have appeared that point to the (unarmed) test #launch of a US #Minuteman-III #ICBM from Vandenberg targetting the Ronald Reagan Test Site on Kwajalein, Nov 5-6
Navigational Warnings have appeared that point to the (unarmed) test #launch of a US #Minuteman-III #ICBM from Vandenberg targetting the Ronald Reagan Test Site on Kwajalein, Nov 5-6
October 31, 2025 at 12:06 PM
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Navigational Warnings have appeared that point to the (unarmed) test #launch of a US #Minuteman-III #ICBM from Vandenberg targetting the Ronald Reagan Test Site on Kwajalein, Nov 5-6
Navigational Warnings have appeared that point to the (unarmed) test #launch of a US #Minuteman-III #ICBM from Vandenberg targetting the Ronald Reagan Test Site on Kwajalein, Nov 5-6
Alas a lot of RF interference during the pass so parts of image lost, but:
Storm Benjamin over the Netherlands in a Meteor M2-4 LRPT image from 15:27 CEST today.
Storm Benjamin over the Netherlands in a Meteor M2-4 LRPT image from 15:27 CEST today.
October 23, 2025 at 1:47 PM
Alas a lot of RF interference during the pass so parts of image lost, but:
Storm Benjamin over the Netherlands in a Meteor M2-4 LRPT image from 15:27 CEST today.
Storm Benjamin over the Netherlands in a Meteor M2-4 LRPT image from 15:27 CEST today.
LRPT image from the Meteor M2-4 satelloite received during the 15:49 CEST pass
October 22, 2025 at 2:12 PM
LRPT image from the Meteor M2-4 satelloite received during the 15:49 CEST pass
A #reentry was observed from the Canary Islands this morning (16 Oct 2025) around 1:57 UTC, including the detection of shockwaves by seismic stations (!).
In cooperation with SPMN and Josep M. Trigo-Rodríguez I was able to identify it as the reentry of the Chinese XJY-7 satellite (2020-102C).
In cooperation with SPMN and Josep M. Trigo-Rodríguez I was able to identify it as the reentry of the Chinese XJY-7 satellite (2020-102C).
October 16, 2025 at 12:29 PM
A #reentry was observed from the Canary Islands this morning (16 Oct 2025) around 1:57 UTC, including the detection of shockwaves by seismic stations (!).
In cooperation with SPMN and Josep M. Trigo-Rodríguez I was able to identify it as the reentry of the Chinese XJY-7 satellite (2020-102C).
In cooperation with SPMN and Josep M. Trigo-Rodríguez I was able to identify it as the reentry of the Chinese XJY-7 satellite (2020-102C).
Storm depression north of Scotland causing strong wind in the Netherlands and surroundings. LRPT image received from the Meteor M2-4 satelloite during the 15:37 CEST pass.
October 4, 2025 at 1:59 PM
Storm depression north of Scotland causing strong wind in the Netherlands and surroundings. LRPT image received from the Meteor M2-4 satelloite during the 15:37 CEST pass.
Full talk with Frediano Finucci of La7 is here (starts at 00:44 and ends at 01:19 in broadcast)
www.la7.it/omnibus/rive...
www.la7.it/omnibus/rive...
September 30, 2025 at 3:30 PM
Full talk with Frediano Finucci of La7 is here (starts at 00:44 and ends at 01:19 in broadcast)
www.la7.it/omnibus/rive...
www.la7.it/omnibus/rive...
Highlights of today of my stay in Rome....
September 28, 2025 at 4:32 PM
Highlights of today of my stay in Rome....
This morning I was a guest in the Italian tv program Omnibus of Frediano Finucci at La7. We talked about the 'secret' X-37B spaceplane, The baby-tv satellite hack by Russia, Russian RPO's and the militarization of space. A small snippet:
tg.la7.it/scienza-e-te...
tg.la7.it/scienza-e-te...
September 27, 2025 at 5:51 PM
This morning I was a guest in the Italian tv program Omnibus of Frediano Finucci at La7. We talked about the 'secret' X-37B spaceplane, The baby-tv satellite hack by Russia, Russian RPO's and the militarization of space. A small snippet:
tg.la7.it/scienza-e-te...
tg.la7.it/scienza-e-te...
7/x
Asteroid (732272) Langejans is about 1 km in diameter and orbits in the asteroid belt, between Mars and Jupiter, with perihelion at 2.45 AU and aphelion at 2.94 AU. It completes one orbit around the sun in 4.4 years.
Asteroid (732272) Langejans is about 1 km in diameter and orbits in the asteroid belt, between Mars and Jupiter, with perihelion at 2.45 AU and aphelion at 2.94 AU. It completes one orbit around the sun in 4.4 years.
September 23, 2025 at 8:49 AM
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Asteroid (732272) Langejans is about 1 km in diameter and orbits in the asteroid belt, between Mars and Jupiter, with perihelion at 2.45 AU and aphelion at 2.94 AU. It completes one orbit around the sun in 4.4 years.
Asteroid (732272) Langejans is about 1 km in diameter and orbits in the asteroid belt, between Mars and Jupiter, with perihelion at 2.45 AU and aphelion at 2.94 AU. It completes one orbit around the sun in 4.4 years.
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Here is an animated GIF of the three discovery images of the asteroid:
Here is an animated GIF of the three discovery images of the asteroid:
September 23, 2025 at 8:49 AM
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Here is an animated GIF of the three discovery images of the asteroid:
Here is an animated GIF of the three discovery images of the asteroid:
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Asteroid (732272) Langejans was discovered on 18 October 2012 by @sarneczky and me with the 0.6-m Schmidt telescope of MPC 461 Piszkéstető in Hungary. Initially given our internal project code "SaLa018", it was later given the temporary designation 2014 CE24 by the MPC
Asteroid (732272) Langejans was discovered on 18 October 2012 by @sarneczky and me with the 0.6-m Schmidt telescope of MPC 461 Piszkéstető in Hungary. Initially given our internal project code "SaLa018", it was later given the temporary designation 2014 CE24 by the MPC
September 23, 2025 at 8:49 AM
4/x
Asteroid (732272) Langejans was discovered on 18 October 2012 by @sarneczky and me with the 0.6-m Schmidt telescope of MPC 461 Piszkéstető in Hungary. Initially given our internal project code "SaLa018", it was later given the temporary designation 2014 CE24 by the MPC
Asteroid (732272) Langejans was discovered on 18 October 2012 by @sarneczky and me with the 0.6-m Schmidt telescope of MPC 461 Piszkéstető in Hungary. Initially given our internal project code "SaLa018", it was later given the temporary designation 2014 CE24 by the MPC