LAUNCH at 0317 UTC Dec 16 of the Ziyuan 3-04 imaging satellite by Chang Zheng 4B from Taiyuan
December 16, 2025 at 3:54 AM
LAUNCH at 0317 UTC Dec 16 of the Ziyuan 3-04 imaging satellite by Chang Zheng 4B from Taiyuan
I looked at @jfoust.bsky.social 's story on the rendezvous between LEO Express 1 and 2. It appears that there were two periods of close approach, on Oct 30-31 and Nov 15-16. Note: the TLEs are only good to a km or so.
December 16, 2025 at 12:13 AM
I looked at @jfoust.bsky.social 's story on the rendezvous between LEO Express 1 and 2. It appears that there were two periods of close approach, on Oct 30-31 and Nov 15-16. Note: the TLEs are only good to a km or so.
The number of active satellites in orbit has now passed the 14000 mark according to my estimates:
December 15, 2025 at 1:22 PM
The number of active satellites in orbit has now passed the 14000 mark according to my estimates:
LAUNCH at 0549 UTC Dec 14 of Starlink Group 15-12 from Vandenberg
December 14, 2025 at 1:43 PM
LAUNCH at 0549 UTC Dec 14 of Starlink Group 15-12 from Vandenberg
LAUNCH at 0309 UTC Dec 14 of a Rocket Lab Electron
from Mahia, placing JAXA's RAISE-4 satellite in orbit.
from Mahia, placing JAXA's RAISE-4 satellite in orbit.
December 14, 2025 at 4:27 AM
LAUNCH at 0309 UTC Dec 14 of a Rocket Lab Electron
from Mahia, placing JAXA's RAISE-4 satellite in orbit.
from Mahia, placing JAXA's RAISE-4 satellite in orbit.
LAUNCH at 0108 UTC Dec 13 of a Kuaizhou-11 from Jiuquan with the Dier-5 microgravity spacecraft and Xiwang-5-2, probably an amateur radio sat, to a 41 deg orbit.
December 13, 2025 at 4:51 AM
LAUNCH at 0108 UTC Dec 13 of a Kuaizhou-11 from Jiuquan with the Dier-5 microgravity spacecraft and Xiwang-5-2, probably an amateur radio sat, to a 41 deg orbit.
Interim updates made to GCAT and the Satcon pages; still some details to fill in over the next couple days.
Completed a successful visit to London, making slow but steady progress on my relocation project. Back in Boston tomorrow, will update the web site over the weekend.
December 12, 2025 at 4:17 AM
Interim updates made to GCAT and the Satcon pages; still some details to fill in over the next couple days.
Completed a successful visit to London, making slow but steady progress on my relocation project. Back in Boston tomorrow, will update the web site over the weekend.
December 9, 2025 at 2:08 PM
Completed a successful visit to London, making slow but steady progress on my relocation project. Back in Boston tomorrow, will update the web site over the weekend.
Warmest congrats to my friend Prof Sera Markoff, whose career I've been privileged to follow since its early days. She now follows in the footsteps of Airy, Challis, G.Darwin, Eddington, Hoyle, Rees and others as the 17th Plumian Prof of Astronomy and Experimental Philosophy (best job title ever).
I'm very excited and honoured to announce my new position 🧪🔭 in the UK, starting in January! See here for more info:
www.ast.cam.ac.uk/news/profess...
www.ast.cam.ac.uk/news/profess...
Professor Sera Markoff appointed Plumian Professor of Astronomy and Experimental Philosophy at University of Cambridge | Institute of Astronomy
Professor Sera Markoff has been appointed Plumian Professor of Astronomy and Experimental Philosophy at the University of Cambridge.
www.ast.cam.ac.uk
December 9, 2025 at 1:40 PM
Warmest congrats to my friend Prof Sera Markoff, whose career I've been privileged to follow since its early days. She now follows in the footsteps of Airy, Challis, G.Darwin, Eddington, Hoyle, Rees and others as the 17th Plumian Prof of Astronomy and Experimental Philosophy (best job title ever).
I won't be doing regular updates for the next two weeks while I'm on travel - I recommend nasaspaceflight.com and spacenews.com and novosti-kosmonavtiki.ru/news/ for launch updates while I'm away
NASASpaceFlight.com
November 30, 2025
nasaspaceflight.com
December 1, 2025 at 10:38 AM
I won't be doing regular updates for the next two weeks while I'm on travel - I recommend nasaspaceflight.com and spacenews.com and novosti-kosmonavtiki.ru/news/ for launch updates while I'm away
LAUNCH at 0744 UTC Dec 1 of Starlink Group 6-86 from Kennedy
December 1, 2025 at 10:31 AM
LAUNCH at 0744 UTC Dec 1 of Starlink Group 6-86 from Kennedy
Great thread on the Shenzhou crisis by @andrewjonesspace.bsky.social
Nov 5, 2025: During routine pre-return checks, the Shenzhou-20 crew spots an abnormal mark on the return capsule portview window. Images from inside and via the space station’s robotic arm are sent to Earth for assessment. content-static.cctvnews.cctv.com/snow-book/in...
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content-static.cctvnews.cctv.com
December 1, 2025 at 10:21 AM
Great thread on the Shenzhou crisis by @andrewjonesspace.bsky.social
The SJ-28 (2025-277) catalog numbers are backfilled gaps in the catalog, 66549 and 66550 (instead of being put at the end as 66781/82) Doing this for new-launched sat is extremely rare, unclear so far if
deliberate new practice or error. I am in favor of filling the gaps.
deliberate new practice or error. I am in favor of filling the gaps.
November 30, 2025 at 11:55 PM
The SJ-28 (2025-277) catalog numbers are backfilled gaps in the catalog, 66549 and 66550 (instead of being put at the end as 66781/82) Doing this for new-launched sat is extremely rare, unclear so far if
deliberate new practice or error. I am in favor of filling the gaps.
deliberate new practice or error. I am in favor of filling the gaps.
LAUNCH at 1220 UTC Nov 30 of China's Shi Jian 28.
SJ-28 and the CZ-7A third stage have been tracked in a 204 x 35806 km x 14.4 deg geotransfer orbit.
SJ-28 and the CZ-7A third stage have been tracked in a 204 x 35806 km x 14.4 deg geotransfer orbit.
November 30, 2025 at 11:51 PM
LAUNCH at 1220 UTC Nov 30 of China's Shi Jian 28.
SJ-28 and the CZ-7A third stage have been tracked in a 204 x 35806 km x 14.4 deg geotransfer orbit.
SJ-28 and the CZ-7A third stage have been tracked in a 204 x 35806 km x 14.4 deg geotransfer orbit.
Transporter-15 mission complete. Most payloads delivered to 512 x 514 km x 97.4 deg; FORMOSAT-8A placed in 563 x 563 km x 97.6 deg; R5-S7 and the F9 second stage placed in a -79 x 568 km x 97 deg orbit with reentry near 173 5N at about 2200 UTC per my calculations
November 28, 2025 at 9:41 PM
Transporter-15 mission complete. Most payloads delivered to 512 x 514 km x 97.4 deg; FORMOSAT-8A placed in 563 x 563 km x 97.6 deg; R5-S7 and the F9 second stage placed in a -79 x 568 km x 97 deg orbit with reentry near 173 5N at about 2200 UTC per my calculations
LAUNCH at 1844 UTC Nov 28 of Falcon 9 from Vandenberg with the Transporter-15 rideshare mission
November 28, 2025 at 6:46 PM
LAUNCH at 1844 UTC Nov 28 of Falcon 9 from Vandenberg with the Transporter-15 rideshare mission
LAUNCH at 0927 UTC Nov 27 of the Soyuz MS-28 spaceship by Soyuz-2-1a from Baykonur carring astronauts Kud'-Sverchkov, Mikaev and Williams. Soyuz MS-28 docked with the ISS Rassvet module at 1234 UTC.
November 27, 2025 at 1:22 PM
LAUNCH at 0927 UTC Nov 27 of the Soyuz MS-28 spaceship by Soyuz-2-1a from Baykonur carring astronauts Kud'-Sverchkov, Mikaev and Williams. Soyuz MS-28 docked with the ISS Rassvet module at 1234 UTC.
LAUNCH at 1613 UTC Nov 26 of South Korea's Nuri flight 4 with the CAS 500-3 satellite and twelve cubesats
November 27, 2025 at 12:39 AM
LAUNCH at 1613 UTC Nov 26 of South Korea's Nuri flight 4 with the CAS 500-3 satellite and twelve cubesats
The three Rodnik satellites launched from Russia today have been cataloged by Space Force in the expected 1500 km, 82.5 deg orbit.
November 26, 2025 at 4:16 AM
The three Rodnik satellites launched from Russia today have been cataloged by Space Force in the expected 1500 km, 82.5 deg orbit.
The secret Electron 76 payload, possibly BlackSky Global-33, has been cataloged by US Space Force in a 468 x 477 km x 42.0 deg orbit. The 42 deg inclination slot has previously been used by Electron from BlackSky, QPS and Strix launches.
November 25, 2025 at 4:58 AM
The secret Electron 76 payload, possibly BlackSky Global-33, has been cataloged by US Space Force in a 468 x 477 km x 42.0 deg orbit. The 42 deg inclination slot has previously been used by Electron from BlackSky, QPS and Strix launches.
LAUNCH at 0411 UTC Nov 25 of the uncrewed Shenzhou 22 spaceship, heading to the Chinese Space Station to provide the crew there with a new return ferry vehicle.
November 25, 2025 at 4:15 AM
LAUNCH at 0411 UTC Nov 25 of the uncrewed Shenzhou 22 spaceship, heading to the Chinese Space Station to provide the crew there with a new return ferry vehicle.
LAUNCH at 0753 UTC Nov 22 of Starlink Group 6-79 from Canaveral
November 22, 2025 at 3:59 PM
LAUNCH at 0753 UTC Nov 22 of Starlink Group 6-79 from Canaveral
Belatedly - LAUNCH at 1243 UTC Nov 20 of a secret commercial satellite by Electron from Mahia, suspected to be a BlackSky Global imaging sat.
[my original post seems to have disappeared, sorry about that]
[my original post seems to have disappeared, sorry about that]
November 22, 2025 at 3:57 PM
Belatedly - LAUNCH at 1243 UTC Nov 20 of a secret commercial satellite by Electron from Mahia, suspected to be a BlackSky Global imaging sat.
[my original post seems to have disappeared, sorry about that]
[my original post seems to have disappeared, sorry about that]
TJS 21 cataloged in 51 deg elliptical transfer orbit and
is likely heading to a Molniya orbit - it is apparently a successor to TJS 13.
is likely heading to a Molniya orbit - it is apparently a successor to TJS 13.
November 22, 2025 at 12:08 AM
TJS 21 cataloged in 51 deg elliptical transfer orbit and
is likely heading to a Molniya orbit - it is apparently a successor to TJS 13.
is likely heading to a Molniya orbit - it is apparently a successor to TJS 13.
LAUNCH at 1055 UTC Nov 21 of TJS21 by a Chang Zheng 3B from Xichang to geotransfer orbit.
November 21, 2025 at 3:49 PM
LAUNCH at 1055 UTC Nov 21 of TJS21 by a Chang Zheng 3B from Xichang to geotransfer orbit.