Space Domain Awareness
@shell_jim
Space surveillance, SSA/SDA, orbital debris expert. Retired USAF with 30+ years of space experience. Physics (M.S.) and Imaging Science (PhD). USAFA '92.
Vous pourriez aimer
3/n This animated plot illustrates the evolution of the orbit plane of the debris field, with the color coded to the area/mass of the objects. Only objects with an accuracy < 1000 km at epoch are shown (677 as of 2025-02-24).
On-orbit servicing. A brief update on Northrop Grumman's MEV-1 (44625 / 2019-067B) station-keeping activities with Austrailia's OPTUS D3 (35756 / 2009-044B) comsat. spacedomain.substack.com/p/on-orbit-ser…
The orbits of two space objects of some significance have just become publicly available for the first time (courtesy of Russia's JSC Vimpel space object catalog). 1️⃣ The PRC YZ-1 upper stage used to inject Shiyan-29 (SY-29, 65486 / 2025-196A) into an inclined geosynchronous…
Atlas V Centaur upper stage breakup - one year later US catalog object 43227 (2018-022B) More than 1000 unique objects tracked, but none cataloged on space-track.org open.substack.com/pub/spacedomai…
What if all those PhDs stop just defending and actually start attacking?!?
A disturbing new development. It appears China is tracking commercial satellites the US is NOT tracking, and furthermore provided orbit information to the owner operators. Sure, it's a benign ~100 gram satellite, but the precedent is unsettling. Article here ->…
*** Commercial Space Tug with 16U Cubesat Likely NOT to Return to GEO from xGEO *** It appears that Chimera GEO-1 (63100 / 2025-038B) will likely NOT make an unsuspecting appearance in geosynchronous orbit Substack article here: spacedomain.substack.com/p/cubesat-slat…
An update on the accelerated placement of PRC upper stages in long-lived high altitude LEO orbits. This population is on the verge of an exponential increase given China's standard practice for mega constellation launches. spacedomain.substack.com/p/mega-mess-ro…
I🛰️ *** Geosynchronous cat & mouse - large maneuver by China's SJ-25/SJ-21 likely targeting satellites from the US USSF-44 launch *** The fascinating element in this are the numerous objects (16) associated with the USSF-44 launch and the varied levels of public disclosure by…
Jonathan's Space Library will be moving to Bromley, south of London, at end 2025. Still to do: - Complete purchase of property - Planning approval for renovation - Construction, and shipping! gofundme.com/f/fund-jonatha… Funds still needed
United States Tendances
- 1. John Bolton 61.8K posts
- 2. Ace Frehley 1,790 posts
- 3. Asheville 4,987 posts
- 4. Putin 184K posts
- 5. #KonamiWorldSeriesSweepstakes 1,983 posts
- 6. Mitch McConnell 37.4K posts
- 7. Term 200K posts
- 8. Steelers 25.4K posts
- 9. Curt Cignetti 5,563 posts
- 10. Andrade 11.8K posts
- 11. #2025MAMAVOTE 1.7M posts
- 12. Espionage Act 9,277 posts
- 13. Carter Hart 4,257 posts
- 14. AJ Green 1,207 posts
- 15. Former Trump 22.3K posts
- 16. Dairy Bird N/A
- 17. Nissan 5,150 posts
- 18. Good for Indiana N/A
- 19. Pence 31.5K posts
- 20. Noah Fant N/A
Vous pourriez aimer
-
ExoAnalytic Solutions
@exoanalytic -
AMOS Conference
@amoscon -
Secure World Foundation
@SWFoundation -
COMSPOC Corp.
@COMSPOC -
Christopher Johnson
@ChrisJohnsonEsq -
brianweeden
@brianweeden -
Gunter Krebs 🚀 🛰 🇺🇦 🏳️🌈
@Skyrocket71 -
Car_Ramrod
@CanuckUFOguy -
Joseph Burkes
@Noah18jojo -
George Sowers
@george_sowers -
Nick Shave
@NickShave12 -
jmarieali
@jmarieali -
Theresa Hitchens
@Genevaexpat -
SafeNotAnOption
@SafeNotAnOption -
Ryan Stacey - Private UF0/Paranormal Investigator
@TheSkeptSleuth
Something went wrong.
Something went wrong.