Week in Space Data, every Friday.
Launch Slip Index · monthly
9 launch dates slipped a day or more in October 2026, across 6 launches, for 19.8 days in total. A slip here means both dates were known to the day; the 27 placeholder date rolls recorded in the month are shown at the bottom and not counted. 1 changes our sync saw late (made before the month or while we were not refreshing the launch) are listed separately and not counted.
Frozen edition. Published November 1, 2026; these figures will not change. Corrections, if any, are logged on /corrections.
| Mission | Provider | From, to | Kind | Move | Observed |
|---|---|---|---|---|---|
| Falcon 9 Block 5 | Starlink Group 15-21 | SpaceX | Nov 1, 2026 to Nov 10, 2026 | Slip | +8.8 d | Oct 20 |
| Long March 8A | SatNet LEO Group 28 | China Aerospace Science and Technology Corporation | Oct 22, 2026 to Oct 25, 2026 | Slip |
| Provider | Slips | Launches slipped | Days lost | Median slip | Pulled in | Same-day | Firmed | Lost a date | Placeholder rolls |
|---|---|---|---|---|---|---|---|---|---|
| SpaceX | 6 | 4 | 14.8 | 1 d | 1 | 25 | 3 | 1 | 14 |
| Rocket Lab | 2 |
| Provider | Flew | Scored | Within 1 day | Within 7 days | Average delay | Median delay |
|---|---|---|---|---|---|---|
| All providers | 20 | 20 | 50% | 85% | +3.4 d | +1 d |
| SpaceX | 11 | 11 | 36% | 82% | +4.3 d | +3 d |
| Mission | Provider | From, to | Kind | Move | Observed |
|---|---|---|---|---|---|
| Falcon 9 Block 5 | Starlink Group 15-21 | SpaceX | Nov 10, 2026 to Nov 5, 2026 | Pulled in | -4.8 d | Oct 22 |
| Electron | The Sea God Surveys (iQPS Launch 9) | Rocket Lab | Nov 4, 2026 to Nov 3, 2026 | Pulled in | -1 d |
| Mission | Provider | From, to | Kind | Move | Observed |
|---|---|---|---|---|---|
| Falcon 9 Block 5 | NROL-195 | SpaceX | Nov 5, 2026 to Nov 2026 | Lost its date | not a slip | Oct 26 |
| Vulcan VC6L | Amazon Leo (LV-01) | United Launch Alliance | Oct 29, 2026 to Nov 2026 | Lost its date |
Launch Library parks an undated launch at the end of a period (“NET 2026” is stored as Dec 31, 2026). When that placeholder moves, nothing was announced and nothing slipped, so these rows are listed for completeness and never counted.
| Mission | Provider | From, to | Kind | Move | Observed |
|---|---|---|---|---|---|
| Falcon 9 Block 5 | Telesat Lightspeed 1 | SpaceX | Dec 2026 to Q3 2027 | Placeholder roll | not a slip | Oct 30 |
| Falcon 9 Block 5 | OneWeb 21 |
These date changes were recorded in this period but did not happen in it: the launch was outside the part of the manifest our sync was refreshing when its date changed, so we only saw the change later. They are listed so nothing is hidden, and are in none of the figures above.
| Mission | Provider | From, to | Kind | Move | Observed |
|---|---|---|---|---|---|
| Falcon 9 Block 5 | 6x Astranis MicroGEO | SpaceX | 2027 to 2028 | Placeholder rollCaught up: seen late | not counted | Oct 27 |
Method v1.1: how moves are classified and launches scored. Data: Launch Library 2 (The Space Devs, a volunteer nonprofit; support them on Patreon) manifest, observed and recorded by SpaceNexus since August 29, 2026. Licence CC BY 4.0: cite “SpaceNexus Launch Ledger”. No sponsor sees or shapes this ledger (policy).
| +3 d |
| Oct 20 |
| Falcon 9 Block 5 | SDA Tranche 1 Transport Layer A | SpaceX | Oct 6, 2026 to Oct 8, 2026 | Slip | +2 d | Oct 6 |
|---|
| Falcon 9 Block 5 | SDA Tranche 1 Transport Layer A | SpaceX | Oct 5, 2026 to Oct 6, 2026 | Slip | +1 d | Oct 5 |
|---|
| Falcon 9 Block 5 | Starlink Group 15-25 | SpaceX | Oct 10, 2026 to Oct 11, 2026 | Slip | +1 d | Oct 7 |
|---|
| Falcon 9 Block 5 | Starlink Group 15-25 | SpaceX | Oct 11, 2026 to Oct 12, 2026 | Slip | +1 d | Oct 8 |
|---|
| Falcon 9 Block 5 | Bandwagon 5 (Dedicated Mid-Inclination Rideshare) | SpaceX | Oct 19, 2026 to Oct 20, 2026 | Slip | +1 d | Oct 19 |
|---|
| Electron | We're Not Hawking Around (3x HawkEye 360) | Rocket Lab | Oct 21, 2026 to Oct 22, 2026 | Slip | +1 d | Oct 21 |
|---|
| Electron | We're Not Hawking Around (3x HawkEye 360) | Rocket Lab | Oct 22, 2026 to Oct 23, 2026 | Slip | +1 d | Oct 22 |
|---|
| 1 |
| 2 |
| 1 d |
| 1 |
| 6 |
| 3 |
| 0 |
| 0 |
| China Aerospace Science and Technology Corporation | 1 | 1 | 3 | 3 d | 0 | 5 | 1 | 0 | 1 |
|---|
| Agency for Defense Development | 0 | 0 | 0 | n/a | 0 | 0 | 1 | 0 | 1 |
|---|
| Arianespace | 0 | 0 | 0 | n/a | 0 | 0 | 1 | 0 | 4 |
|---|
| Avio S.p.A | 0 | 0 | 0 | n/a | 0 | 0 | 0 | 0 | 1 |
|---|
| Galactic Energy | 0 | 0 | 0 | n/a | 0 | 1 | 0 | 0 | 0 |
|---|
| HyImpulse | 0 | 0 | 0 | n/a | 0 | 0 | 0 | 1 | 0 |
|---|
| Indian Space Research Organization | 0 | 0 | 0 | n/a | 0 | 2 | 1 | 1 | 1 |
|---|
| Innospace | 0 | 0 | 0 | n/a | 0 | 0 | 0 | 0 | 1 |
|---|
| Isar Aerospace | 0 | 0 | 0 | n/a | 0 | 0 | 1 | 0 | 0 |
|---|
| Korea Aerospace Research Institute | 0 | 0 | 0 | n/a | 0 | 1 | 0 | 0 | 0 |
|---|
| Mitsubishi Heavy Industries | 0 | 0 | 0 | n/a | 0 | 0 | 1 | 0 | 3 |
|---|
| Payload Aerospace S.L. | 0 | 0 | 0 | n/a | 0 | 0 | 0 | 0 | 1 |
|---|
| United Launch Alliance | 0 | 0 | 0 | n/a | 0 | 0 | 3 | 1 | 0 |
|---|
| China Aerospace Science and Technology Corporation |
|---|
| 4 |
| 4 |
| 75% |
| 100% |
| +0.8 d |
| +0.1 d |
| Galactic Energy | 1 | 1 | too few (1) | too few (1) | 0 d | 0 d |
|---|
| Indian Space Research Organization | 1 | 1 | too few (1) | too few (1) | +15.8 d | +15.8 d |
|---|
| Korea Aerospace Research Institute | 1 | 1 | too few (1) | too few (1) | 0 d | 0 d |
|---|
| LandSpace | 1 | 1 | too few (1) | too few (1) | 0 d | 0 d |
|---|
| Rocket Lab | 1 | 1 | too few (1) | too few (1) | +2.3 d | +2.3 d |
|---|
Shares are shown once a group has 3 or more scored launches. Delay is liftoff minus the first firm date on record; negative means it flew early.
| Oct 23 |
| not a slip |
| Oct 24 |
| GSLV Mk II | IRNSS-1L (NVS-03) | Indian Space Research Organization | Oct 13, 2026 to Oct 2026 | Lost its date | not a slip | Oct 1 |
|---|
| SR75 | Flight 2 | HyImpulse | Oct 5, 2026 to Q2 2027 | Lost its date | not a slip | Oct 1 |
|---|
| SpaceX |
| Q1 2027 to Nov 2026 |
| Placeholder roll |
| not a slip |
| Oct 29 |
| Starship | Flight 15 | SpaceX | Q4 2026 to Nov 2026 | Placeholder roll | not a slip | Oct 28 |
|---|
| Long March 12A | Flight 2 | China Aerospace Science and Technology Corporation | Oct 2026 to 2026 | Placeholder roll | not a slip | Oct 26 |
|---|
| Falcon Heavy | USSF-63 | SpaceX | 2027 to Dec 31, 2029 (decade precision) | Placeholder roll | not a slip | Oct 25 |
|---|
| Miura 5 | Maiden Flight | Payload Aerospace S.L. | 2026 to 2027 | Placeholder roll | not a slip | Oct 23 |
|---|
| Falcon 9 Block 5 | Cygnus CRS-2 NG-22 | SpaceX | 2026 to 2027 | Placeholder roll | not a slip | Oct 23 |
|---|
| Falcon 9 Block 5 | Telesat Lightspeed 2 | SpaceX | 2026 to 2027 | Placeholder roll | not a slip | Oct 23 |
|---|
| Falcon 9 Block 5 | Telesat Lightspeed 3 | SpaceX | 2026 to 2027 | Placeholder roll | not a slip | Oct 23 |
|---|
| Falcon 9 Block 5 | Telesat Lightspeed 4 | SpaceX | 2026 to 2027 | Placeholder roll | not a slip | Oct 23 |
|---|
| Falcon 9 Block 5 | Telesat Lightspeed 5 | SpaceX | 2026 to 2027 | Placeholder roll | not a slip | Oct 23 |
|---|
| Falcon 9 Block 5 | Telesat Lightspeed 6 | SpaceX | 2026 to 2027 | Placeholder roll | not a slip | Oct 23 |
|---|
| Falcon 9 Block 5 | Telesat Lightspeed 7 | SpaceX | 2026 to 2027 | Placeholder roll | not a slip | Oct 23 |
|---|
| H3-24 | Lunar Polar Exploration Mission (LUPEX) | Mitsubishi Heavy Industries | 2026 to 2028 | Placeholder roll | not a slip | Oct 23 |
|---|
| SSLV | AayulSAT-1A & others | Indian Space Research Organization | Oct 2026 to 2026 | Placeholder roll | not a slip | Oct 22 |
|---|
| Mir | Demo Flight | Agency for Defense Development | 2026 to Nov 2026 | Placeholder roll | not a slip | Oct 21 |
|---|
| Vega-C Block 2 | Space Rider | Avio S.p.A | 2028 to Q2 2028 | Placeholder roll | not a slip | Oct 21 |
|---|
| Falcon Heavy | Gateway PPE & HALO | SpaceX | 2027 to Dec 31, 2029 (decade precision) | Placeholder roll | not a slip | Oct 15 |
|---|
| Ariane 62 | Galileo L15 (FOC FM28 & FM31) | Arianespace | Q4 2026 to Q1 2027 | Placeholder roll | not a slip | Oct 14 |
|---|
| Ariane 64 | GO-1 | Arianespace | 2026 to Dec 31, 2029 (decade precision) | Placeholder roll | not a slip | Oct 13 |
|---|
| Ariane 64 Block 2 | Amazon Leo (LE-04) | Arianespace | Oct 2026 to Nov 2026 | Placeholder roll | not a slip | Oct 13 |
|---|
| Ariane 62 | Metop-SG B1 | Arianespace | Nov 2026 to Dec 2026 | Placeholder roll | not a slip | Oct 13 |
|---|
| H3-24 | HTV-X2 | Mitsubishi Heavy Industries | 2026 to 2027 | Placeholder roll | not a slip | Oct 8 |
|---|
| H3-24 | HTV-X3 | Mitsubishi Heavy Industries | 2026 to 2027 | Placeholder roll | not a slip | Oct 8 |
|---|
| Falcon 9 Block 5 | Cygnus CRS-2 NG-25 | SpaceX | Dec 2026 to Nov 2026 | Placeholder roll | not a slip | Oct 4 |
|---|
| Spectrum | AT-Astra and Others (Spectrum Flight 3) | Isar Aerospace | 2026 to Nov 26, 2026 | Firmed | not a slip | Oct 29 |
|---|
| Falcon 9 Block 5 | Cygnus CRS-2 NG-25 | SpaceX | Nov 2026 to Nov 29, 2026 | Firmed | not a slip | Oct 29 |
|---|
| Mir | Demo Flight | Agency for Defense Development | Nov 2026 to Nov 4, 2026 | Firmed | not a slip | Oct 28 |
|---|
| Vulcan VC6L | Amazon Leo (LV-01) | United Launch Alliance | Nov 2026 to Nov 13, 2026 | Firmed | not a slip | Oct 28 |
|---|
| Long March 2F/G | Shenzhou 24 | China Aerospace Science and Technology Corporation | 2026 to Nov 25, 2026 | Firmed | not a slip | Oct 24 |
|---|
| GSLV Mk II | IRNSS-1L (NVS-03) | Indian Space Research Organization | Oct 2026 to Oct 30, 2026 | Firmed | not a slip | Oct 22 |
|---|
| H3 | MBR Explorer | Mitsubishi Heavy Industries | Q1 2028 to Mar 3, 2028 | Firmed | not a slip | Oct 21 |
|---|
| Ariane 64 Block 2 | Amazon Leo (LE-04) | Arianespace | Nov 2026 to Nov 23, 2026 | Firmed | not a slip | Oct 14 |
|---|
| Falcon 9 Block 5 | Bandwagon 5 (Dedicated Mid-Inclination Rideshare) | SpaceX | Oct 2026 to Oct 19, 2026net of 2 moves that day | Firmed | not a slip | Oct 13 |
|---|
| Electron | We're Not Hawking Around (3x HawkEye 360) | Rocket Lab | 2026 to Oct 21, 2026 | Firmed | not a slip | Oct 12 |
|---|
| Electron | The Sea God Surveys (iQPS Launch 9) | Rocket Lab | 2026 to Nov 4, 2026 | Firmed | not a slip | Oct 12 |
|---|
| Electron | The Mountain God Rises (iQPS Launch 10) | Rocket Lab | 2026 to Nov 10, 2026 | Firmed | not a slip | Oct 12 |
|---|
| Vulcan VC6L | Amazon Leo (LV-01) | United Launch Alliance | Oct 2026 to Oct 29, 2026 | Firmed | not a slip | Oct 8 |
|---|
| Atlas V N22 | Starliner-1 | United Launch Alliance | Dec 2026 to Jan 14, 2027 | Firmed | not a slip | Oct 7 |
|---|
| Falcon 9 Block 5 | Dragon CRS-2 SpX-35 | SpaceX | Oct 2026 to Oct 13, 2026net of 3 moves that day | Firmed | not a slip | Oct 1 |
|---|