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How to watch Long March 4B launch

Sat, Oct 24, 3:25 AM GMT+8

Fri, Oct 23, 19:25 UTC · launch window 22 minutes

Long March 4B · China Aerospace Science and Technology Corporation · Jiuquan Satellite Launch Center, People's Republic of China

Add this launch to your calendar (.ics) · every launch from Jiuquan

How firm is the date: Go for launch (confirmed by the provider)
Date history: Moved 1 time since we first recorded it (net 1.4 h later).
At the pad when the window opens: Night launch. The sun is well below the horizon. The engine flame is visible from far away on a clear night; the plume is not lit by the sun.

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What to expect

We have not checked this mission's landing plan by hand. If a booster flies back to a landing zone on land, its landing brings a sonic boom; the provider's mission page says where the booster lands.
Sound travels about a kilometre every 3 seconds (a mile every 5), so at a distance you see liftoff before you hear it.

Will it go on time?

A launch date is a "no earlier than" target. Weather, a technical hold, the range or a boat in the hazard area can each stop a count on the day, and the provider then names a new time. We do not publish launch odds we cannot back; here is what we recorded.

6 launches have flown from Jiuquan since we started recording date changes on Aug 29, 2026; 3 of them had the date or time moved at least once after we first recorded it, and 1 slipped by a day or more. That is too few launches to call it a rate.
Of the 38 launches that have flown from every site we track since we started recording date changes on Aug 29, 2026, 24 (63%) had the date or time moved at least once after we first recorded it, and 6 (16%) slipped by a day or more.

Sources

Launch time, status and pad: the Launch Library 2 manifest as synced by SpaceNexus; times move, and this page follows them.
Day or night: computed from the sun's position at the pad at the time shown. Distances: computed from coordinates.

The launch page: countdown, stream, date history →Every Jiuquan launch this month →Which launches slip, and by how much →

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What to expect

Will it go on time?

Sources