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OrbitalFocus
@orbitalfocus.bsky.social
For those genuinely interested in the finer points of new launches & activities on orbit. Curated by Robert Christy.

www.OrbitalFocus.uk
Recent NRO Launches

Payload descriptions and some orbit details available

L-192
#074focus.uk/2025#074" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#074

L-174
#077focus.uk/2025#077" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#077
April 18, 2025 at 8:30 AM
Mission Update

Chinese Space Station

The small sat released on Apr 7 (63523, 2021-035E)
made a thruster firing Apr 16 with no significant effect on orbit height

Behaviour is similar to 62300/035D that was in orbit between 2024 Dec 7 and 2025 Apr 7

#63523cus.uk/2021#63523" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2021#63523
April 17, 2025 at 8:21 AM
Mission Update

Chinese Space Station

Released a small object on Apr 7 (63523, 2021-035E)
#035focus.uk/2021#035" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2021#035

May be similar to 62300/035D released 2024 Dec 7 - it re-entered the same day the new item appeared (Space-Track re-entry date of April 10 is incorrect)
April 13, 2025 at 9:19 AM
Mission Update

MEV 1 (44625, 2019-067B)

Northrop Grumman completed contract to provide 5 yrs support to Intelsat 901

Moved to graveyard orbit Mar 31 to release Intelsat

Will return to GEO to take over station keeping and pointing of another Intelsat

#44625cus.uk/2019#44625" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2019#44625
April 5, 2025 at 12:29 PM
Mission Update

Cosmos 2581 etc

2025-026C, one of the two parts of Cosmos 2583, made a very small thruster firing earlier today

Effect on orbit height was insignificant

026A & 026B continue to orbit together within a couple of hundred metres of each other
April 2, 2025 at 9:20 PM
Launch Advisory

4x second generation internet connectivity test satellites
Apr 1, 04:00 UTC
CZ 2D
Jiuquan SC

450 km orbit, lower than the 1000 km of earlier (presumably gen 1) missions
#067focus.uk/2025#067" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#067
April 1, 2025 at 12:44 PM
Mission Update

Cosmos 2581 etc

026A & B still orbiting in tandem, with B a few metres ahead and doing the station keeping

026C & D are 3000+ km ahead with no orbit changes since separating from each other, not obvious if both are operational satellites
#026focus.uk/2025#026" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#026
April 1, 2025 at 8:56 AM
Mission Update

Shijian 25

China's satellite servicing vehicle has been sitting at 120° east since launch in January
#002focus.uk/2025#002" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#002

Potential client, Shijian 21, continues slow eastward drift, currently near 143° east
#094focus.uk/2021#094" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2021#094

Could there be a problem?
March 28, 2025 at 9:21 AM
Mission Update

USA 498

Payload on the Falcon 9 launch on Mar 24

The amateur observing community is now tracking it in an orbit close to my initial estimate, see the comparison:
#060focus.uk/2025#060" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#060
March 28, 2025 at 8:46 AM
Mission Update

USA 498
NRO L-69 mission

Space-Track has catalogued a single satellite

Estimated orbit added to the Orbital Focus table based on timing of visual observations of the Falcon 9 from Europe and the location of the Falcon 9 re-entry zone

#060focus.uk/2025#060" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#060
March 25, 2025 at 7:11 PM
Visual sightings from Europe at ~20:00 UTC of propellant venting after re-entry firing of Falcon 9

Confirms near 65° inclination and demise of F9 above southern Indian Ocean ~20:50 UTC

Also suggests orbit height above 1000 km - possible NOSS mission

#060focus.uk/2025#060" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#060
Launch Advisory

NRO sat
Mar 24, 17:48 UTC
Falcon 9
CCSFS

Upper stage firing includes an inclination change

First stage aimed at ~50° inclination but stage 2 re-entry zone indicates final orbit ~65° incl

Launch time for Mar 25 is 14 min earlier, also consistent with ~65°
March 25, 2025 at 8:33 AM
Launch Advisory

NRO sat
Mar 24, 17:48 UTC
Falcon 9
CCSFS

Upper stage firing includes an inclination change

First stage aimed at ~50° inclination but stage 2 re-entry zone indicates final orbit ~65° incl

Launch time for Mar 25 is 14 min earlier, also consistent with ~65°
March 22, 2025 at 10:28 AM
Mission Update

Cosmos 2581 etc

C2582 still harassing 2581

When 026F separated from C2583, their orbits were raised and lowered from the original by similar amounts, suggests similar masses and that a spring mechanism was involved (Newton's third law)

#026focus.uk/2025#026" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#026
March 21, 2025 at 9:44 AM
Mission Update

Cosmos 2581, etc

Object, so far unidentified, was released from Cosmos 2583 on Mar 18 at about 20:15 UTC

C2581 & 2582 continue to orbit together with 2582 making the station keeping effort

Could this be a space weapon system?

#026focus.uk/2025#026" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#026
March 19, 2025 at 9:06 AM
Mission Update

TJS 15

Interesting events in GEO - apparently two payloads, both have changed orbit

My take on it
#045focus.uk/2025#045" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#045

Shaping up to be similar to the TJS 3 mission
#110focus.uk/2018#110" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2018#110

Intriguingly, TJS 3 departed its GEO station March 17
March 18, 2025 at 10:30 AM
Launch Advisory

3x Rodnik store/dump comsats?
Mar 16, 10:50 UTC
Angara 1.2
Plesetsk

Orbit details available
#054focus.uk/2025#054" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#054

Will be given 'Cosmos' numbers

Orbit plane matches an earlier group of Rodnik sats, launched in 2015
#050focus.uk/2015#050" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2015#050
March 16, 2025 at 6:25 PM
Cosmos 2581 - 2583

C2581 and C2582 are still orbiting close to each other but not flying in formation

C2583 has shown its first sign of life with a very small orbit tweak - maybe a thruster test, it continues to move further ahead of the other two

#026focus.uk/2025#026" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#026
March 15, 2025 at 6:28 PM
Space-Track not doing very well today:

1 - Dragon Crew 10 has been given an ISS Designation - 1998-067XH instead of 2025-049A

2 - 2025-050B has been named as "ELECTRON KICK STAGE" (ie the third stage) where it is actually the second stage

#049focus.uk/2025#049" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#049
March 15, 2025 at 6:23 PM
Mission Update

Cosmos 2581, etc

Cosmos 2581 & 2582 have near-enough matched orbits as of Mar 9, running in tandem with C2582 less than 20 km in the lead

At the same time C2583 was about 230 km in front of C2581 with the gap increasing by ~100 km/day
#026focus.uk/2025#026" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#026
March 10, 2025 at 9:14 AM
Mission Update

USSF/Boeing X-37B orbiting as USA 349 on Mission OTV 7

Landed at Vandenberg SFB earlier today
#210focus.uk/2023#210" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2023#210
March 7, 2025 at 9:18 PM
Mission Updates

Roscosmos says third object on 2025-026 launch is Cosmos 2851 (thanks to Bart Hendrickx)
#026focus.uk/2025#026" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#026

Orbit of CSO 3 satellite from Mar 6 Ariane launch is classified secret, Ariane 6 upper stage was caused to re-enter
#044focus.uk/2025#044" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#044
March 7, 2025 at 6:25 PM
Mission Update

Shijian 25 - China's GEO satellite servicing mission

Still sitting at 120° east where it arrived 7 weeks ago
#002focus.uk/2025#002" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#002

Shijian 21, its potential client, is currently at 146° east, drifting slowly eastwards at ~0.1°/day,
#094focus.uk/2021#094" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2021#094
March 6, 2025 at 10:09 AM
Sats with orbital pairings

1 - USA 485 & 486, a couple of Starshields running along together
#014focus.uk/2025#014" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#014

2 - Cosmos 2581 & 2582, also co-orbiting
#026focus.uk/2025#026" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">orbitalfocus.uk/2025#026
March 5, 2025 at 10:42 AM
Heads Up…

Nav warnings for China & Indian Ocean pointed to launch from Jiuquan Mar 1 at ~09:59 UTC, possibly one of the commercial launchers rather than CZ

Ground track points to 81° inclination, a new one for China

Neither replacement warnings nor news of failure issued yet
March 3, 2025 at 2:33 PM
Quote from CEO of AstroForge - owner of Odin asteroid mission, make of it what you will

"Because we are so close on ephemeris, there is a non-zero chance that it [thruster firing] will actually put us on a course to the asteroid..."

AstroForge feed
https://www.astroforge.com/updates/odin-learnings
March 2, 2025 at 12:22 PM