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s2a systems @s2a-systems.bsky.social · 28/09/2026

A short clip of ESA's JUICE Earth flyby, recorded about 38 minutes before closest approach.

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s2a systems @s2a-systems.bsky.social · 16/09/2026

Once again USA 32 (#19460), during its second pass over South America this morning 2026-09-16, 09:23:35 – 09:34:48 UTC.

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s2a systems @s2a-systems.bsky.social · 16/09/2026

Some recordings of USA 32 (#19460), whose fragmentation in LEO on 13 Sep 2026 at approximately 2113 UTC was confirmed by U.S. Space Forces–Space (S4S). By the time of the recordings, a large number of fragments had already dispersed over a wide section of the track.

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s2a systems @s2a-systems.bsky.social · 12/09/2026

A short animation of PRC TEST SPACECRAFT 4 (#67689) and, most likely, OBJECT J (#100681) passing over South America on 2026-09-10, from 09:45:07 to 09:48:39 UTC.

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s2a systems @s2a-systems.bsky.social · 10/09/2026

Two snapshots of SPECTRUM #100614 and OBJECT E #100613, recorded on 2026-09-07 between 21:40:46 and 21:43:40 UTC.

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s2a systems @s2a-systems.bsky.social · 04/09/2026

A short animation of images recorded over 36 min of @isro’s EOS-05 (GISAT-1A) and the GSLV upper stage, from Switzerland on 2026-09-04, 19:11:36–19:47:36 UTC.

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s2a systems @s2a-systems.bsky.social · 03/09/2026

With the re-entry of CLUSTER II-FM8 (Tango) on 1 September, our daily tracking campaign for the final two CLUSTER satellites has come to an end.

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s2a systems @s2a-systems.bsky.social · 30/08/2026

The Nancy Grace Roman Space Telescope on its way. Recorded on 2026-08-30, 12:41:23 UTC from our Australian site. #NASARoman

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s2a systems @s2a-systems.bsky.social · 28/08/2026

A snapshot of the CZ-6C upper stage (#100472), recorded today 2026-08-28, 21:26:21 UTC from our Swiss station. The upper stage apparently fragmented according today’s post from LeoLabs: www.linkedin.com/posts/at-230...

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s2a systems @s2a-systems.bsky.social · 31/07/2026

Interesting change in the orbital data for INTELSAT 805 #25371 and visually detectable objects in the vicinity. Worth keeping a closer eye on.

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s2a systems @s2a-systems.bsky.social · 08/07/2026

Some of the Transporter-17 payloads over Switzerland, recorded on 2026-07-07, 23:17:33 UTC.

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s2a systems @s2a-systems.bsky.social · 23/06/2026

A short time-lapse of PRC TEST SPACECRAFT 4 (67689/2026-024A) and the newly deployed object (69673/2026-024H), captured on 2026-06-23 during their pass over Switzerland.

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s2a systems @s2a-systems.bsky.social · 19/06/2026

A short time-lapse of last night’s pass of the CZ-12 upper stage (69581/2026-137K) over Switzerland, recorded on 2026-06-19 from 01:55 to 02:04 UTC.

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s2a systems @s2a-systems.bsky.social · 18/06/2026

Bluebird 8-10 from launch 2026-139. Recorded on 2026-06-18, 01:50:00 UTC

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s2a systems @s2a-systems.bsky.social · 18/06/2026

8 payloads from CentiSpace-1 launch 2026-138. Recorded on 2026-06-18, 01:37:34 UTC

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s2a systems @s2a-systems.bsky.social · 18/06/2026

All 9 payloads from GuoWang launch 2026-137. Recorded on 2026-06-18, 00:43:45 UTC

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s2a systems @s2a-systems.bsky.social · 18/06/2026

The CZ-12 upper stage from launch 2026-137 (69581/2026-137K), recorded tonight, 2026-06-18 between 00:26 and 00:30 UTC during its pass over Switzerland.

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s2a systems @s2a-systems.bsky.social · 14/06/2026

After a longer period of bad weather, a short view on the ZQ-2E R/B (69537/2026-128C), recorded this morning from Australia.

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s2a systems @s2a-systems.bsky.social · 19/05/2026

Since monitoring Near-Earth Objects (NEOs) is also part of Space Situational Awareness, we didn’t want to miss this opportunity and took a quick look at 2026 JH2 during its visit yesterday. en.wikipedia.org/wiki/2026_JH2

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s2a systems @s2a-systems.bsky.social · 05/05/2026

Happy Anniversary, LAGEOS-1. Today, May 4, marks the 50th anniversary of the launch of the LAser GEOdynamic Satellite (LAGEOS) 1. A good reason to track it for a few minutes and say hello. More about the mission at: earth.gsfc.nasa.gov/geo/missions...

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s2a systems @s2a-systems.bsky.social · 27/04/2026

STARLINK G17-16 as it emerges from Earth's shadow and passes over South America on 2026-04-26 from 22:53:38 to 22:56:45 UTC.

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s2a systems @s2a-systems.bsky.social · 10/04/2026

This morning’s Artemis II: Integrity on its way back home Crossing the field of view slowly from left to right. Time-lapse covering the period from 07:30:00 to 07:59:58 UTC on 2026-04-10. Further observations from our sites will no longer be possible due to the orbit.

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s2a systems @s2a-systems.bsky.social · 09/04/2026

This morning’s Artemis II: Integrity on its way back home, at the edge of the Milky Way. Crossing the field of view from bottom left to top right. Time-lapse covering the period from 06:25:39 to 07:25:36 UTC on 2026-04-09. Second-to-last day of the mission.

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s2a systems @s2a-systems.bsky.social · 08/04/2026

And now for something completely different: a short time-lapse of Starlink G17-35 passing over Switzerland on 2026-04-07, from 19:17:38 to 19:18:31.

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s2a systems @s2a-systems.bsky.social · 08/04/2026

Today’s Artemis II: Integrity on its way back home. Time-lapse covering the period from 06:45:04 to 07:45:00 UTC on 2026-04-08.

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s2a systems @s2a-systems.bsky.social · 07/04/2026

Today’s Artemis II: Integrity on its way back home. Crossing the field of view from the bottom center to the top. Time-lapse covering the period from 07:00:00 to 08:00:31 UTC on 2026-04-07.

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s2a systems @s2a-systems.bsky.social · 06/04/2026

Today’s Artemis II: Integrity on its way to the Moon. Crossing the field of view from the bottom left to the top right. Time-lapse covering the period from 04:00:04 to 05:59:56 UTC on 2026-04-06.

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s2a systems @s2a-systems.bsky.social · 05/04/2026

Today’s Artemis II: Integrity on its way to the Moon. Time-lapse covering the period from 07:20:05 to 08:24:46 UTC on 2026-04-05.

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s2a systems @s2a-systems.bsky.social · 04/04/2026

Today’s Artemis II: Integrity on its way to the Moon. Time-lapse covering the period from 08:05:32 to 09:24:34 UTC on 2026-04-04.

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s2a systems @s2a-systems.bsky.social · 03/04/2026

A cropped and zoomed-in animation of yesterday's ICPS after the CubeSats were deployed. Time-lapse covering the period from 04:26:31 to 05:35:42 UTC on 2026-04-02.

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s2a systems @s2a-systems.bsky.social · 03/04/2026

Today’s Artemis II: Integrity on its way to the Moon. Time-lapse covering the period from 09:17:45 to 10:01:26 UTC on 2026-04-03.

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s2a systems @s2a-systems.bsky.social · 02/04/2026

Artemis II: Orion and ICPS at high altitude over Australia on 2026-04-02, 19:34:51 UTC

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s2a systems @s2a-systems.bsky.social · 02/04/2026

A snapshot taken at 04:22:24 UTC shows Orion and ICPS, as well as what appear to be the deployed international CubeSats

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s2a systems @s2a-systems.bsky.social · 02/04/2026

And a closer look at Artemis II Orion and ICPS. The animation spans the period from 03:16:18 to 03:27:31 UTC.

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s2a systems @s2a-systems.bsky.social · 02/04/2026

A first view on Artemis II from South America on 2026-04-02, 01:57:58 UTC

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s2a systems @s2a-systems.bsky.social · 01/04/2026

STARLINK G10-44 low elevation pass over our South American site on 2026-03-31 10:06:39 UTC at 4.5 degrees elevation.

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s2a systems @s2a-systems.bsky.social · 31/03/2026

A short clip of tumbling STARLINK-34343 (#64157), recorded from Switzerland on 2026-03-31 between 20:47:24 and 20:48:10 UTC.

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s2a systems @s2a-systems.bsky.social · 24/03/2026

Snapshot of the 16 Rassvet-3 01 satellites and two additional objects from today, 2026-03-24 09:43:12 UTC

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s2a systems @s2a-systems.bsky.social · 21/03/2026

A 6.5-hour time-lapse sequence showing yesterday’s TJS-10/TJS-3 (centered) encounter, including the passage through Earth’s shadow near the equinox.

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s2a systems @s2a-systems.bsky.social · 13/03/2026

SatNet LEO Group 20 and the Long March 8A (CZ-8A) upper stage from this morning over South America. The objects surrounding the upper stage are most likely remnants of the passivation process.

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s2a systems @s2a-systems.bsky.social · 09/03/2026

A two hours light-curve from EXPRESS AT1 (Ekspress-AT1) #39612 recorded last night.

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s2a systems @s2a-systems.bsky.social · 06/03/2026

An unfavorable orbit and a lot of Saharan dust over Central Europe made observation difficult. Nevertheless, we were able to record about 90 minutes of today's PROBA-3 pass from Switzerland. PROBA-3 CSC shows currently a repeating rotation pattern of approximately 1150 seconds.

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s2a systems @s2a-systems.bsky.social · 30/01/2026

A short time lapse of the fragmentation event on LUCH (OLYMP) #40258 that took place today, 2026-01-30 from 06:09:03.486 UTC.

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s2a systems @s2a-systems.bsky.social · 30/01/2026

LUCH (Olymp) has started to tumble in its graveyard orbit tonight. Additional objects around the satellite can also be visually detected. An analysis of our photometric data is currently in progress.

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s2a systems @s2a-systems.bsky.social · 30/01/2026

A short time-lapse sequence of today's SJ-29A (#67302) and SJ-29B (#67403).

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s2a systems @s2a-systems.bsky.social · 22/12/2025

SJ-25/SJ-21 from 2025-12-22 15:15:14 UTC. After another day of bad weather, we can optically separate them again since this afternoon.

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s2a systems @s2a-systems.bsky.social · 21/12/2025

Object A and B from launch 2025-306. Four objects were detected at the position of 2025-306B.

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s2a systems @s2a-systems.bsky.social · 20/12/2025

SJ-25/SJ-21 ? from today 12:53:18 UTC. After the observed possible start of a new approximation of the two satellites on December 17, the weather was bad for two days. Slightly better conditions today allowed new observations. So, a new puzzling and search campaign has started.

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s2a systems @s2a-systems.bsky.social · 12/12/2025

A bit of Starlink from this week: STARLINK G6-90 & STARLINK G6-92.

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s2a systems @s2a-systems.bsky.social · 09/12/2025

ISS and the undocked Soyuz MS-27, recorded on 2025-12-09 02:27:13 UTC over South America, during a low elevation pass (4 deg elevation). We wish for a successful mission completion and a safe return to Earth.

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