🚀 Space Pulse · 2026-08-03 22:01 UTC

SPACE PULSE

Monday, August 4, 2026 | Edition 216

⚡ TL;DR

JAXA has postponed the H3 launch of Michibiki 7 navigation satellite, now rescheduled to August 6, while a G2 geomagnetic storm hit Earth on August 2 and unsettled conditions persist through today. ^{[1] [2] [3]}

A busy mid-August launch corridor looms with China and SpaceX missions queued, and solar activity keeps space weather forecasters on watch. ^{[4] [5] [6]}

🚀 LAUNCHES

MICHIBIKI 7 (QZS-7) - H3-22, JAXA / Mitsubishi Heavy Industries

• Launch postponed; new window is August 6, 2026 at 19:30 UTC from Tanegashima; the Quasi-Zenith navigation satellite will serve Japan's regional positioning network. ^{[1] [7]}

GLOBALSTAR 2-R MISSION 1 - Falcon 9 Block 5, SpaceX

• Nine Globalstar communications satellites targeting a 1,410 km orbit at 52 degrees inclination; NET August 16, 2026 at 01:12 UTC; confirmed under contract signed in early 2022. ^[5]

LONG MARCH 12 - CASC, Unknown Payload

• China Aerospace Science and Technology Corporation targeting August 17, 2026 at 02:00 UTC; payload details not yet disclosed. ^[8]

CHANG'E 7 - Long March 5, CASC

• Multi-element lunar south pole mission comprising orbiter, lander, rover, and a mini-hopping probe; NET August 24, 2026; to Be Confirmed status. ^[4]

ELECTRON - StriX Launch 11 and LOXSAT 1, Rocket Lab

• Synspective SAR imaging satellite and Eta Space NASA-sponsored cryogenic oxygen demo satellite both targeting no-earlier-than August 31, 2026; dates listed as To Be Determined. ^{[9] [10]}

🔭 DISCOVERIES

LUNAR RELAY MILESTONE

• NASA delivered its NavCube3-mini navigation payload to Intuitive Machines on July 13, 2026 for integration into Altus-1, the company's first lunar relay satellite, advancing future Moon communications infrastructure.

BARNES ICE CAP MELT

• NASA Earth Observatory reports that Barnes Ice Cap on Canada's Baffin Island lost its seasonal snow cover unusually quickly and early in summer 2026, exposing an extensive network of melt features.

APOD - METEOR AND LACERTA NEBULA

• NASA's Astronomy Picture of the Day for August 3 features a vaporizing meteor streak crossing the field of the Lacerta Nebula, captured in a chance astrophotography alignment.

🛰️ MISSIONS

ISS - ESA ASTRONAUT SOPHIE ADENOT

• ESA published a behind-the-scenes look at how gourmet French food was prepared, cleared for spaceflight safety, and delivered to Adenot aboard the International Space Station as part of her bonus menu.

NASA ARTEMIS EVA TRAINING

• Ike Theriot, Flight Operations Surface Testing lead in NASA's EVA and Human Surface Mobility program at Johnson Space Center, is leading surface testing activities to prepare astronauts for lunar extravehicular operations.

MICHIBIKI LAUNCH POSTPONEMENT

• JAXA confirmed the postponement of H3 Flight No. 9 carrying QZS-7 in a release dated August 3, 2026; the mission is now marked Go for Launch for the August 6 window. ^{[1] [7]}

☀️ SPACE WEATHER

G2 MODERATE GEOMAGNETIC STORM - AUGUST 2, 2026

• NOAA SWPC recorded a geomagnetic K-index of 6 at 17:59 UTC on August 2, triggering a G2 Moderate storm alert via GOES-19; operators of HF radio and satellite orientation systems were advised. ^[2]

ONGOING UNSETTLED CONDITIONS - THROUGH AUGUST 4

• Extended K-index-of-4 warning remains valid through August 4 at 00:00 UTC; a separate K-index-of-5 warning was extended to August 3 at 15:00 UTC, both driven by persistence conditions. ^{[3] [6]}

G1 WATCH ISSUED FOR AUGUST 3

• NOAA issued a G1 Minor storm watch for August 3 on August 2 at 16:34 UTC; levels are expected to drop below G1 on August 4 and 5.

CONTEXT - RECENT SOLAR ACTIVITY

• Back-to-back Type II radio emissions on July 26 at 1,057 km/s and July 27 at 622 km/s indicated CME-associated shocks; elevated MeV electron flux above 1,000 pfu persisted across multiple days in mid-to-late July via GOES-18 and GOES-19.

📄 RESEARCH

GALAXY AT THE EFFICIENCY CEILING

• A newly reported massive galaxy is found to be converting its available baryonic gas into stars at nearly the maximum theoretically possible rate, approaching the so-called feedback-free efficiency limit and testing models of stellar feedback in the early Universe.

WARM SUB-SATURNS ARE SPIN-ORBIT ALIGNED

• A new study shows warm sub-Saturn exoplanets orbiting single stars are predominantly spin-orbit aligned, in sharp contrast to hot sub-Saturns which are frequently misaligned, with the two populations differing at the 3.2-sigma level, placing new constraints on migration history.

TDE RATES FROM LOCAL UNIVERSE SIMULATIONS

• Using the SLOW constrained cosmological simulation, researchers provide 3D tidal disruption event rate estimates calibrated to the local Universe, offering a more reliable budget for upcoming LSST transient surveys than traditional 2D analytical methods.

LUNAR IMPACT FLASHES FROM 2025 GEMINIDS

• The Twin Impact Lunar Telescope network observed impact flashes from the 2025 Geminid meteor shower, contributing new data on meteoroid size and mass distribution in the centimeter-to-decimeter range.

GALAXY BAR PATTERN SPEEDS VIA SCHWARZSCHILD MODELLING

• Researchers applied Schwarzschild dynamical modelling to face-on barred galaxy simulations and successfully recovered bar pattern speeds, linking 3D bar structure, orbital composition, and dark matter distribution in a framework testable with upcoming IFU surveys.

W51 COMPLEX AS A GALACTIC PEVATRON LABORATORY

• A new analysis of the W51 star-forming complex, motivated by LHAASO ultra-high-energy gamma-ray detections, models particle illumination and shock-cloud interactions to probe the origin of Galactic cosmic rays at PeV energies.

Space Pulse is produced from official source feeds only. All times UTC.

Next edition: August 4, 2026.

📎 Sources

1. [release] Launch Postponement of MICHIBIKI No. 7, Quasi-Zenith… — JAXA Press
2. Space Weather Message Code: ALTK06 — NOAA SWPC Alerts
3. Space Weather Message Code: WARK04 — NOAA SWPC Alerts
4. Long March 5 | Chang'e 7 — Launch Library 2
5. Falcon 9 Block 5 | Globalstar 2-R Mission 1 (x 9) — Launch Library 2
6. Space Weather Message Code: WARK05 — NOAA SWPC Alerts
7. H3-22 | Michibiki 7 (QZS-7) — Launch Library 2
8. Long March 12 | Unknown Payload — Launch Library 2
9. Electron | StriX Launch 11 — Launch Library 2
10. Electron | LOXSAT 1 — Launch Library 2

Curated from official sources — NASA/ESA/JAXA/ESO/NOAA/arXiv/Launch Library. Informational only.
Serial 20260803-22-v47 · 2026-08-03 22:01 UTC · pulse.uzylab.com