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Jonathan McDowell

Jonathan McDowell

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Astrophysicist tracking launches and satellites; author of Jonathan's Space Report newsletter.

Recent Posts

Starlink Group 17‑25 Launches From Vandenberg at 090
Social•Feb 21, 2026

Starlink Group 17‑25 Launches From Vandenberg at 090

LAUNCH at 0904 UTC Feb 21 of Starlink Group 17-25 from Vandenberg Space Force Base

By Jonathan McDowell
Exobrake Deployment Detected via Sharp Decay Spike
Social•Feb 18, 2026

Exobrake Deployment Detected via Sharp Decay Spike

TechEdSat-11 was a 6UXL cubesat from NASA-Ames and San Jose State to test an exobrake drag device, launched on 2024 Jul 4. It reentered Feb 15; the decay rate increased sharply on Jan 16, likely marking the exobrake deployment. https://t.co/qEcoxQwW7c

By Jonathan McDowell
Jonathan's Space Report No. 853 Now Online Only
Social•Feb 16, 2026

Jonathan's Space Report No. 853 Now Online Only

Jonathan's Space Report No. 853 published at https://t.co/6gKV8Gl53V I have temporarily lost the capability to send this out as an email newsletter, so for the time being you'll have to access this on the website.

By Jonathan McDowell
Chinese Spaceplane Shifts to Near‑circular 588‑km Orbit
Social•Feb 16, 2026

Chinese Spaceplane Shifts to Near‑circular 588‑km Orbit

The Chinese spaceplane maneuvered from a 349 x 592 km orbit to a circular 588 x 597 km orbit at about 0050 UTC Feb 12. (Shown: perigee, average, apogee heights) https://t.co/X9FhHPTxwJ

By Jonathan McDowell
Proton Rocket Launches Russia Weather Satellite with Iran TV Payload
Social•Feb 13, 2026

Proton Rocket Launches Russia Weather Satellite with Iran TV Payload

The Proton launch of Russia's Elektro-L No. 5 weather satellite carried a secondary payload, Iran's Jam-e Jam 1 television broadcasting sat, also called Iran-DBS. Elektro-L-5 has a mass of 2120 kg; Jam-e Jam 1 is likely only 150 kg...

By Jonathan McDowell
Vulcan Centaur Reaches Orbit Despite Booster Glitch
Social•Feb 13, 2026

Vulcan Centaur Reaches Orbit Despite Booster Glitch

LAUNCH at 0922 UTC Feb 12 of a Vulcan Centaur from Canaveral with the Space Force's GSSAP 7 and 8 satellites, and possibly other payloads. One of the GEM 63XL solid boosters malfunctioned but the vehicle was reportedly able to reach...

By Jonathan McDowell
Two Feb 12 Launches Deploy Seven Satellites and a Weather Probe
Social•Feb 13, 2026

Two Feb 12 Launches Deploy Seven Satellites and a Weather Probe

LAUNCH at 0637 UTC Feb 12 of a Jielong-3 from the DFHT ship off Yangjiang, placing seven sats in orbit including Pakistan's PRSC-EO2 imaging sat. LAUNCH at 0852 UTC Feb 12 of a Proton from Baykonur with the Elektro-L weather sat.

By Jonathan McDowell
Turkish Satellites Identified on Bandwagon‑4, Owner Unclear
Social•Feb 9, 2026

Turkish Satellites Identified on Bandwagon‑4, Owner Unclear

The Semi-1N, Semi-1P, Semi-1L payloads from Nov 2025's Bandwagon-4 launch are now identified and revealed to be Turkish satellites. As far as I know the specific owner has still not been revealed - anyone know?

By Jonathan McDowell