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Monthly release · September 2026

SpaceNexus Launch Cadence and Slip Report

Orbital launch attempts, outcomes and schedule slippage for the month, by provider and vehicle.

Data as of 2026-09-30 · computed 2026-10-01 · current edition

← August 2026 All editions

Launch attempts: 27
Outcomes: 27 / 0
Year to date: 239
Launch slips: 7

Attempts by provider

Every provider with a recorded launch attempt in the month, with outcomes and share of the month.

Attempts by provider. Every provider with a recorded launch attempt in the month, with outcomes and share of the month. Showing the first 10 of 13 rows.
#	Provider	Attempts	Successes	Failures	Share of month
1	SpaceX	8	8	0	+29.6%
2	China Aerospace Science and Technology Corporation	5	5	0	+18.5%
3	Rocket Lab	4	4	0	+14.8%
4	Avio S.p.A	1

Attempts by vehicle

Launch vehicles flown in the month, by attempts.

Attempts by vehicle. Launch vehicles flown in the month, by attempts. Showing the first 10 of 18 rows.
#	Vehicle	Attempts	Successes	Failures
1	Falcon 9 Block 5	7	7	0
2	Electron	4	4	0
3	Gravity-1	1	1	0
4	GSLV Mk. II	1	1	0
5	Kinetica 1	1	1

Launches behind these tables

Every recorded launch attempt in the month, in date order. This is the row set the tables above are computed from.

Launches behind these tables. Every recorded launch attempt in the month, in date order. This is the row set the tables above are computed from. Showing the first 10 of 27 rows.
Date	Mission	Provider	Vehicle	Outcome	Site
2026-09-01	Pallas-1 \| Demo Flight	Galactic Energy	Pallas-1	success	Jiuquan Satellite Launch Center, People's Republic of China
2026-09-02	Falcon 9 Block 5 \| Starlink Group 15-23	SpaceX	Falcon 9 Block 5	success	Vandenberg SFB, CA, USA
2026-09-02	Electron \| Owl Around The World (StriX Launch 11)	Rocket Lab	Electron	success	Rocket Lab Launch Complex 1, Mahia Peninsula, New Zealand
2026-09-03	GSLV Mk II \| GISAT-1A (EOS-05)	Indian Space Research Organization	GSLV Mk. II

Manifest changes observed in the month

Every launch date move our ledger recorded inside the month, netted per launch per day and classified by the Launch Ledger method. Only a move between two dates known to the day counts as a slip; a placeholder such as "NET 2026" rolling to "2027" is listed but never counted. Caught up: the date changed while our sync was not refreshing this launch (or Launch Library 2 says it changed earlier), so the day we saw it is not the day it happened. Listed, never counted in weekly, monthly or quarterly figures.

Manifest changes observed in the month. Every launch date move our ledger recorded inside the month, netted per launch per day and classified by the Launch Ledger method. Only a move between two dates known to the day counts as a slip; a placeholder such as "NET 2026" rolling to "2027" is listed but never counted. Caught up: the date changed while our sync was not refreshing this launch (or Launch Library 2 says it changed earlier), so the day we saw it is not the day it happened. Listed, never counted in weekly, monthly or quarterly figures. Showing the first 10 of 101 rows.
Observed	Mission	Provider	Kind	From	To	Days moved	Seen
2026-09-21	Falcon 9 Block 5 \| Starlink Group 15-25	SpaceX	Slip	Sep 30, 2026	Oct 10, 2026	9.3	Seen live
2026-09-08	Soyuz 2.1b \| Progress MS-35 (96P)	Russian Federal Space Agency (ROSCOSMOS)

Launch slips by provider

Held back until the month's ledger holds at least 25 real slips. This month holds 7, and a rate computed from that many would not mean anything.

Nothing to report in this table for this edition. An empty table here means we recorded nothing, not that nothing happened.

Vehicles not currently flying

From the hand-maintained vehicle status sheet. Each row carries the date the entry was last checked, so a stale sheet is visible rather than silently trusted.

Vehicles not currently flying. From the hand-maintained vehicle status sheet. Each row carries the date the entry was last checked, so a stale sheet is visible rather than silently trusted. 6 rows.
Vehicle	Standing	Where it stands	Sheet as of	Days since checked
Neutron	development	Rocket Lab's reusable medium-lift rocket, ~13,000 kg to LEO; first flight targeted late 2026.	2026-09-06	25
New Glenn	grounded	Grounded while Launch Complex 36 is rebuilt after the May 28, 2026 static-fire explosion; return to flight targeted before the end of 2026.	2026-09-06	25
New Shepard	paused	Paused since January 30, 2026 for at least two years while Blue Origin puts its people on the Blue Moon lunar lander; not selling seats.	2026-09-06	25
SpaceShipTwo (VSS Unity)	retired	Retired after Galactic 06 in January 2024; Virgin Galactic's Delta-class successors are targeted for commercial service from Q4 2026, with seats on sale at $750,000 since April 2026.

Methodology

Launch counts come from the SpaceEvent table, restricted to rows carrying a Launch Library 2 identifier and a terminal outcome (completed or failed). Curated seed events, which are not launches, are excluded by identifier shape.
A launch is attributed to the month its launch date falls in, in UTC.
"Attempts" counts every launch that left the pad and reached a recorded outcome. Success rate is successes divided by attempts for that month; a month with no attempts reports no rate rather than zero.
Provider is the agency recorded on the launch row as Launch Library spells it; no provider names are merged or renamed.
Slip figures come from the LaunchDateChange ledger, which records every manifest date move we observe. The ledger starts on 2026-08-29 and cannot be backfilled by anyone, us included: Launch Library exposes no revision history. Months before that date report launches without slips, and the page says so.

What this edition can and cannot see

Coverage limits travel with the numbers, here and in every export of them.

This edition counts 27 launch attempts recorded for September 2026: rows carrying a Launch Library identifier and a terminal outcome. Scrubbed and still-upcoming launches are not attempts and are not counted.
Launch counts describe our tracker. A month our launch history does not reach reports zero attempts, which is why every edition prints the count rather than only a rate.
Schedule movement comes from a ledger that began recording on 2026-08-29 and cannot be backfilled: Launch Library keeps no revision history, so no one can reconstruct moves observed before that date.
Per-provider slip statistics are withheld this month: 7 real slips is below the 25 needed for a rate to mean anything.
Of 72 changes our sync saw when they happened (netted per launch per day), 7 were slips (a day or more later, both dates known to the day), 1 pulled a launch in and 28 moved it by less than a day. 36 were placeholder rolls, firmings or lost dates, which are listed but not counted as slips. The median real move of a day or more was 3.5 days.

Sources and licences

The same credits are written into every CSV and JSON export of this data, so a downloaded file still names its sources.

UK Companies House: Company registration data from the UK Companies House register. Contains public sector information licensed under the Open Government Licence v3.0. Open Government Licence v3.0

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Citation

SpaceNexus Launch Cadence and Slip Report, September 2026. SpaceNexus, data as of 2026-09-30. https://spacenexus.us/releases/launch-cadence/2026-09. https://spacenexus.us/releases/launch-cadence/2026-09 (retrieved 2026-10-01).

Free to cite and embed with attribution. Data updates continuously; the citation date pins your retrieval.

By SpaceNexus Data

Computed from SpaceNexus data - no model is involved in producing a release

Every figure here is arithmetic over our own rows (counts, sums, deltas and rankings), and the page and its export are built by the same code, so they cannot disagree. How this edition is computed

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