@s2a-systems.bsky.social
Developing and operating systems for Space Situational Awareness.
Welcome back!
15.02.2026 13:17 — 👍 2 🔁 0 💬 0 📌 0The bright object at 06:14:15 is just a bright star in the background. There was no interaction with the satellite.
31.01.2026 10:37 — 👍 4 🔁 0 💬 1 📌 0
and the corresponding light curve
30.01.2026 11:14 — 👍 12 🔁 1 💬 0 📌 0A short time lapse of the fragmentation event on LUCH (OLYMP) #40258 that took place today, 2026-01-30 from 06:09:03.486 UTC.
30.01.2026 11:14 — 👍 51 🔁 18 💬 4 📌 8
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.
30.01.2026 09:05 — 👍 7 🔁 4 💬 0 📌 0A short time-lapse sequence of today's SJ-29A (#67302) and SJ-29B (#67403).
30.01.2026 00:08 — 👍 2 🔁 1 💬 0 📌 0
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.
22.12.2025 15:24 — 👍 2 🔁 1 💬 0 📌 0
Object A and B from launch 2025-306. Four objects were detected at the position of 2025-306B.
21.12.2025 03:29 — 👍 2 🔁 2 💬 0 📌 0
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.
20.12.2025 15:51 — 👍 1 🔁 1 💬 0 📌 0
A bit of Starlink from this week: STARLINK G6-90 & STARLINK G6-92.
12.12.2025 09:12 — 👍 2 🔁 1 💬 0 📌 0
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.
09.12.2025 02:44 — 👍 2 🔁 1 💬 0 📌 0
The 9 satellites of Guowang Group 14. Recorded today, 2025-12-07 15:27:17 UTC.
07.12.2025 16:50 — 👍 2 🔁 1 💬 0 📌 0
The one object catalogued so far from the ZhuQue-3 launch 2025-282, recorded on 2025-12-05 01:52:24 UTC.
05.12.2025 10:29 — 👍 2 🔁 1 💬 0 📌 1
Bad weather delayed the obs, but here they are: SJ-25 and SJ-21A on 2025-11-29, 13:37:43 UTC
29.11.2025 14:20 — 👍 2 🔁 1 💬 0 📌 0I don't have the mission details at hand. But maybe @planet4589.bsky.social has a better insight here.
29.11.2025 13:49 — 👍 2 🔁 0 💬 1 📌 0A short animation of tonight's pass of Transporter-15 from 2025-11-29 03:25:32 UTC (horizon) to 2025-11-29 03:27:05 UTC (entry into Earth's shadow), seen from South America.
29.11.2025 11:02 — 👍 10 🔁 5 💬 1 📌 0
A quick snapshot of Transporter-15 with some activity. Recorded on 2025-11-29 03:26:22 UTC at 7.4 deg elevation over South America.
29.11.2025 04:06 — 👍 6 🔁 2 💬 0 📌 0
We took this week another look at the object we suspect to be 65589. The object still appears to be rotating, and the photometry shows a pattern comparable to the measurement taken on September 14, 2025.
20.11.2025 17:31 — 👍 2 🔁 1 💬 0 📌 0
And something slightly OT. C/2025 K1 (ATLAS) during a tracking pause last night. 50 frames stacked and a single frame, from a bit earlier in the evening, to visualize the three fragments a little more clearly.
19.11.2025 15:07 — 👍 16 🔁 6 💬 0 📌 0
A snapshot of VIASAT-3 F2 and the ATLAS 5 CENTAUR R/B from earlier this week.
19.11.2025 13:57 — 👍 2 🔁 1 💬 0 📌 0
Finally, observation conditions are improving. New Glenn GS2 (2025-260C) from this morning, 2025-11-17 08:08:18 UTC, with a rotation period of approximately 309 seconds.
17.11.2025 12:40 — 👍 3 🔁 2 💬 0 📌 02025-10-28: Satellite routine paused. Comet mode activated. C/2025 A6 (Lemmon), 17:15:29 – 18:03:33 UTC, recorded from Switzerland.
02.11.2025 13:48 — 👍 4 🔁 1 💬 0 📌 0
HTV-X1, today 2025-10-27 23:57:21 UTC over South America.
28.10.2025 00:29 — 👍 3 🔁 1 💬 0 📌 0
A short light curve of the object catalogued as 2025-239A. Recorded yesterday, 2025-10-24 between 17:56:54 and 18:09:59 UTC. Looks like the upper stage and not the payload.
25.10.2025 21:52 — 👍 2 🔁 1 💬 0 📌 0
The 28 satellites of STARLINK Group 11-5, today 2025-10-23 00:09:06 UTC over South America.
23.10.2025 19:39 — 👍 3 🔁 1 💬 0 📌 0
The 18 satellites of the Qianfan Jigui (G60) Group 18, today 2025-10-21 08:01:38 UTC over South America.
21.10.2025 14:43 — 👍 3 🔁 2 💬 0 📌 0
The five satellites of the Hulianwang Digui Group 11, recorded today, 2025-09-28 10:11:33 UTC
28.09.2025 13:34 — 👍 2 🔁 1 💬 0 📌 0
GEESAT Group 06, recorded today 2025-09-25, 18:41:31 from Australia.
25.09.2025 23:20 — 👍 1 🔁 1 💬 0 📌 0
The four WHJSW test satellites... and heavy space traffic. Recorded today, 2025-09-17 at 09:54:43 UTC from Australia.
17.09.2025 18:22 — 👍 1 🔁 1 💬 0 📌 0
COSMOS 2596 [GLONASS-K1], recorded today, 2025-09-14 12:41:00 UTC, accompanied by a fainter, tumbling object in train.
14.09.2025 14:13 — 👍 1 🔁 1 💬 0 📌 0
