SpaceX F9 : Starlink group 11-15 : VSFB SLC-4E : 7 December 2025 (17:58 UTC)

[Galactic Penguin SST]

Thread for the Starlink Group 11-15 launch.

Launch 7 December 2025, at 17:58:30 UTC (9:58 am PST), from Vandenberg SLC-4E, on booster 1088-12. The first stage successfully landed aboard Of Course I Still Love You.

Payload 28 Starlink V2.0 Mini satellites, to a 53.17 degrees inclination orbit on a southeastern trajectory.  Initial orbit 259 x 272 km.

Please use the Starlink Discussion Thread for all general discussion on Starlink.

Check the Starlink Index Thread for links to more Starlink information.


L2 SpaceX: https://forum.nasaspaceflight.com/index.php?board=60.0

[Galactic Penguin SST]

There's lot of confusions between this, Starlink Group 11-30 and even Transporter-15 on the sequence of launches after Sentinel-6B, but this marine navigation warning was filed today: https://www.navcen.uscg.gov/broadcast-notice-to-mariners-message?guid=66833652

SAFETY / Pacific Ocean / SPACE OPERATIONS / CGD-SW BNM 9054-25 / Mon, 17 Nov 2025 12:05:16 -0500

1. SPACE LAUNCH OPERATIONS, WHICH MAY BE HAZARDOUS TO SURFACE VESSELS, WILL
BE CONDUCTED WITHIN PORTIONS OF THE FOLLOWING HAZARD AREAS FOR SPACE X
STARLINK G11-15:
A. FROM 32-37-00N/118-51-00W
TO 32-35-00N/118-52-00W
TO 34-31-00N/120-38-00W
TO 34-40-00N/120-39-00W
TO 34-33-00N/120-13-00W TO BEGINNING
B. FROM 30-26-00N/117-26-00W
TO 30-47-00N/117-25-00W
TO 30-30-00N/116-57-00W
TO 30-11-00N/116-53-00W
TO 30-05-00N/117-07-00W TO BEGINNING
C. FROM 28-58-00N/116-22-00W
TO 29-12-00N/116-48-00W
TO 29-32-00N/117-06-00W
TO 29-46-00N/117-11-00W
TO 30-03-00N/117-10-00W
TO 30-11-00N/116-57-00W
TO 30-11-00N/116-36-00W
TO 30-05-00N/116-28-00W
TO 29-42-00N/116-06-00W
TO 29-18-00N/115-56-00W TO BEGINNING

2. HAZARD PERIODS FOR PRIMARY LAUNCH DAY AND BACKUP LAUNCH DAYS (ALL TIMES
ARE REPRESENTED AS ZULU TIME UNLESS OTHERWISE INDICATED):

A.
22/2144 NOV 25 TO 23/0207 NOV 25.
23/2122 NOV 25 TO 24/0145 NOV 25.
24/2100 NOV 25 TO 25/0123 NOV 25.
25/2037 NOV 25 TO 26/0100 NOV 25.
26/2015 NOV 25 TO 27/0038 NOV 25.
27/1953 NOV 25 TO 28/0016 NOV 25.
28/1931 NOV 25 TO 28/2354 NOV 25.
B.
23/2144 NOV 25 TO 23/0209 NOV 25.
24/2122 NOV 25 TO 24/0147 NOV 25.
25/2100 NOV 25 TO 25/0125 NOV 25.
26/2037 NOV 25 TO 26/0102 NOV 25.
27/2015 NOV 25 TO 27/0040 NOV 25.
28/1953 NOV 25 TO 28/0018 NOV 25.
29/1931 NOV 25 TO 28/2356 NOV 25.
C.
22/2144 NOV 25 TO 23/0226 NOV 25.
23/2122 NOV 25 TO 24/0204 NOV 25.
24/2100 NOV 25 TO 25/0142 NOV 25.
25/2037 NOV 25 TO 26/0119 NOV 25.
26/2015 NOV 25 TO 27/0057 NOV 25.
27/1953 NOV 25 TO 28/0035 NOV 25.
28/1931 NOV 25 TO 29/0013 NOV 25.

3. THE U.S. COAST GUARD IS PROVIDING THIS NOTICE TO ADVISE MARINERS OF THESE
HAZARDOUS AREAS IDENTIFIED BY U.S. SPACE FORCE AND/OR A COMMERCIAL SPACE
OPERATION, WHICH MAY IMPACT NAVIGATION INTERESTS. NAVIGATION HAZARDS FROM
ROCKET LAUNCH ACTIVITIES MAY INCLUDE FREE FALLING DEBRIS AND/OR DESCENDING
VEHICLES OR VEHICLE COMPONENTS UNDER VARIOUS MEANS OF CONTROL. MARINERS ARE
URGED TO AVOID WATERS WITHIN ROCKET FLIGHT TRAJECTORIES/HAZARD AREAS DURING
LAUNCH WINDOWS AS DETAILED ABOVE.

4. FOR MORE INFORMATION, MARINERS MAY CONTACT THE U.S. SPACE FORCE LAUNCH
INFORMATION HOTLINE AT 1-800-470-7232 OR BY VISITING
WWW.PATRICK.SPACEFORCE.MIL. FOR NAVIGATIONAL SAFETY, MARINERS ARE ADVISED TO
REFER TO THE GEOSPATIAL CHART AT WWW.NAVCEN.USCG.GOV/CHART FOR INFORMATION ON
SPACE LAUNCH AND RECOVERY OPERATIONS (SOLAR).
BT

[Galactic Penguin SST]

This launch has finally shown up on CADENA OIS for launch NET December 5:

Primary Launch Day 05 DEC 1658Z-2140Z Backup Launch Day 06 DEC 1635Z-2117Z Backup Launch Day 07 DEC 1613Z-2055Z Backup Launch Day 08 DEC 1551Z-2033Z Backup Launch Day 09 DEC 1529Z-2011Z Backup Launch Day 10 DEC 1507Z-1949Z Backup Launch Day 11 DEC 1445Z-1927Z

[Galactic Penguin SST]

For some reason SpaceX didn't post what booster this is flying on when they added the mission page...

https://www.spacex.com/launches/sl-11-15

SpaceX’s Falcon 9 is targeting the launch of 28 Starlink satellites to low-Earth orbit from Space Launch Complex 4 East (SLC-4E) from Vandenberg Space Force Base in California.

A live webcast of this mission will begin about five minutes prior to liftoff, which you can watch here and on X @SpaceX. You can also watch the webcast on the X TV app.

There is the possibility that residents of Santa Barbara, San Luis Obispo, and Ventura counties may hear one or more sonic booms during the launch, but what residents experience will depend on weather and other conditions.

[Steven Pietrobon]

For some reason SpaceX didn't post what booster this is flying on when they added the mission page...

Perhaps they are using a new first stage. Attached is the PDF of online press kit, which still hasn't been updated with information on the first stage.

[avialuh]

For some reason SpaceX didn't post what booster this is flying on when they added the mission page...

Perhaps they are using a new first stage. Attached is the PDF of online press kit, which still hasn't been updated with information on the first stage.

New first stage is not possible.

[zubenelgenubi]

https://celestrak.org/NORAD/elements/supplemental/
Supplemental GP Element Sets
Current as of 2025 Dec 04 20:46:47 UTC (Day 338)

Starlink G11-15 Pre-Launch   
Derived from a pre-launch Starlink-G11-15 state vector, provided by SpaceX. SupGP data is provided for the entire stack, as well as one for a single satellite.

Launch: 2025-12-07 16:13:00 UTC.
Deploy: 2025-12-07 17:13:24.960 UTC.
Launch window: 2025-12-07 16:13:00 UTC to 2025-12-07 20:13:00 UTC.

https://celestrak.org/NORAD/elements/supplemental/table.php?FILE=starlink-g11-15&FORMAT=tle
Pre-Launch Derived Orbit:
259 km x 272 km x 53.17 deg

[Galactic Penguin SST]

After days with the information lacking, the website finally updated to show B1088 flying this launch on its 12th flight:

This is the 12th flight for the first stage booster supporting this mission, which previously launched NROL-126, Transporter-12, SPHEREx, NROL-57, and seven Starlink missions. Following stage separation, the first stage will land on the Of Course I Still Love You droneship, which will be stationed in the Pacific Ocean.

There was a recent report that a booster recently seen at McGregor is one moving from West to East, and this assignment almost certainly confirms B1075 - one planned as a Falcon Heavy side booster but never used as such - as the one in question, similar to B1073 & B1076 that were expended in launches this year (which means it may be planned for the same fate). The same list also includes B1092.

[zubenelgenubi]

https://celestrak.org/NORAD/elements/supplemental/
Supplemental GP Element Sets
Current as of 2025 Dec 06 06:17:33 UTC (Day 340)

Starlink G11-15 Pre-Launch   
Derived from a pre-launch Starlink-G11-15 state vector, provided by SpaceX. SupGP data is provided for the entire stack, as well as one for a single satellite.

Launch: 2025-12-07 16:23:50 UTC.
Deploy: 2025-12-07 17:24:14.960 UTC.
Launch window: 2025-12-07 16:23:50 UTC to 2025-12-07 16:26:39 UTC.

Backup Launch Opportunity #1   
Launch: 2025-12-07 16:26:40 UTC.
Deploy: 2025-12-07 17:27:04.960 UTC.
Launch window: 2025-12-07 16:26:40 UTC to 2025-12-07 16:29:29 UTC.

Backup Launch Opportunity #2   
Launch: 2025-12-07 16:42:40 UTC.
Deploy: 2025-12-07 17:43:04.960 UTC.
Launch window: 2025-12-07 16:42:40 UTC to 2025-12-07 16:54:39 UTC.

Backup Launch Opportunity #3   
Launch: 2025-12-07 17:33:00 UTC.
Deploy: 2025-12-07 18:33:24.960 UTC.
Launch window: 2025-12-07 17:33:00 UTC to 2025-12-07 17:36:19 UTC.

Backup Launch Opportunity #4   
Launch: 2025-12-07 17:58:30 UTC.
Deploy: 2025-12-07 18:58:54.960 UTC.
Launch window: 2025-12-07 17:58:30 UTC to 2025-12-07 18:06:29 UTC.

Backup Launch Opportunity #5   
Launch: 2025-12-07 18:20:00 UTC.
Deploy: 2025-12-07 19:20:24.960 UTC.
Launch window: 2025-12-07 18:20:00 UTC to 2025-12-07 18:31:09 UTC.

Backup Launch Opportunity #6   
Launch: 2025-12-07 19:01:30 UTC.
Deploy: 2025-12-07 20:01:54.960 UTC.
Launch window: 2025-12-07 19:01:30 UTC to 2025-12-07 19:06:29 UTC.

Backup Launch Opportunity #7   
Launch: 2025-12-07 19:12:30 UTC.
Deploy: 2025-12-07 20:12:54.960 UTC.
Launch window: 2025-12-07 19:12:30 UTC to 2025-12-07 19:14:59 UTC.

Backup Launch Opportunity #8   
Launch: 2025-12-07 19:32:40 UTC.
Deploy: 2025-12-07 20:33:04.960 UTC.
Launch window: 2025-12-07 19:32:40 UTC to 2025-12-07 19:39:19 UTC.

Backup Launch Opportunity #9   
Launch: 2025-12-07 19:39:20 UTC.
Deploy: 2025-12-07 20:39:44.960 UTC.
Launch window: 2025-12-07 19:39:20 UTC to 2025-12-07 19:45:19 UTC.

Backup Launch Opportunity #10   
Launch: 2025-12-07 19:59:00 UTC.
Deploy: 2025-12-07 20:59:24.960 UTC.
Launch window: 2025-12-07 19:59:00 UTC to 2025-12-07 20:02:59 UTC.

Backup Launch Opportunity #11   
Launch: 2025-12-07 20:03:40 UTC.
Deploy: 2025-12-07 21:04:04.960 UTC.
Launch window: 2025-12-07 20:03:40 UTC to 2025-12-07 20:04:29 UTC.

Backup Launch Opportunity #12   
Launch: 2025-12-07 20:07:40 UTC.
Deploy: 2025-12-07 21:08:04.960 UTC.
Launch window: 2025-12-07 20:07:40 UTC to 2025-12-07 20:08:59 UTC.

[catdlr]

Update:  Added Alternate Pre-Launch Coverage

Here is a consolidated post of available video links for this launch:

SpaceX's direct live broadcast on
Website:  https://www.spacex.com/launches/sl-11-15
 Twitter:  https://x.com/i/broadcasts/1ZkKzZdoeddKv

SpaceX Re-broadcast alternatives on YouTube: 
Space Affairs:  https://youtube.com/watch?v=heuGPaydIPQ

There is no planned NSF Live coverage. Alternate Pre-Launch Coverage:  https://youtube.com/watch?v=bjMWs_W_WKM

Replay supplied by The Space Devs (15 min after the broadcast end):  https://youtube.com/@thespacedevs/videos

Summary Video provided by SciNews (15 min after the broadcast ends):  https://youtube.com/@SciNewsRo/videos

Launch Ground Video:  https://bensweather.com/

Fleet Booster Number:  https://twitter.com/BoosterSpX

[zubenelgenubi]

Launch delayed to backup launch opportunity #4.

https://celestrak.org/NORAD/elements/supplemental/
Supplemental GP Element Sets
Current as of 2025 Dec 06 06:17:33 UTC (Day 340)

Starlink G11-15 Pre-Launch   
Derived from a pre-launch Starlink-G11-15 state vector, provided by SpaceX. SupGP data is provided for the entire stack, as well as one for a single satellite.
<snip>
Backup Launch Opportunity #4   
Launch: 2025-12-07 17:58:30 UTC.
Deploy: 2025-12-07 18:58:54.960 UTC.
Launch window: 2025-12-07 17:58:30 UTC to 2025-12-07 18:06:29 UTC.

Backup Launch Opportunity #5   
Launch: 2025-12-07 18:20:00 UTC.
Deploy: 2025-12-07 19:20:24.960 UTC.
Launch window: 2025-12-07 18:20:00 UTC to 2025-12-07 18:31:09 UTC.

Backup Launch Opportunity #6   
Launch: 2025-12-07 19:01:30 UTC.
Deploy: 2025-12-07 20:01:54.960 UTC.
Launch window: 2025-12-07 19:01:30 UTC to 2025-12-07 19:06:29 UTC.

Backup Launch Opportunity #7   
Launch: 2025-12-07 19:12:30 UTC.
Deploy: 2025-12-07 20:12:54.960 UTC.
Launch window: 2025-12-07 19:12:30 UTC to 2025-12-07 19:14:59 UTC.

Backup Launch Opportunity #8   
Launch: 2025-12-07 19:32:40 UTC.
Deploy: 2025-12-07 20:33:04.960 UTC.
Launch window: 2025-12-07 19:32:40 UTC to 2025-12-07 19:39:19 UTC.

Backup Launch Opportunity #9   
Launch: 2025-12-07 19:39:20 UTC.
Deploy: 2025-12-07 20:39:44.960 UTC.
Launch window: 2025-12-07 19:39:20 UTC to 2025-12-07 19:45:19 UTC.

Backup Launch Opportunity #10   
Launch: 2025-12-07 19:59:00 UTC.
Deploy: 2025-12-07 20:59:24.960 UTC.
Launch window: 2025-12-07 19:59:00 UTC to 2025-12-07 20:02:59 UTC.

Backup Launch Opportunity #11   
Launch: 2025-12-07 20:03:40 UTC.
Deploy: 2025-12-07 21:04:04.960 UTC.
Launch window: 2025-12-07 20:03:40 UTC to 2025-12-07 20:04:29 UTC.

Backup Launch Opportunity #12   
Launch: 2025-12-07 20:07:40 UTC.
Deploy: 2025-12-07 21:08:04.960 UTC.
Launch window: 2025-12-07 20:07:40 UTC to 2025-12-07 20:08:59 UTC.

[Steven Pietrobon]

PDF of updated online press kit, which now includes the first stage information.

[catdlr]

T-25 min  Current Weather Conditions

[catdlr]

T-16 min   Trajectory

[catdlr]

https://x.com/BoosterTracker/status/1997723661269397899

Booster Tracker
@BoosterTracker

Starlink Group 11-15 will mark SpaceX's 509th reflight of a Falcon booster and 162nd launch of 2025.

[catdlr]

Transporter Erector retraction started.

[catdlr]

Stage 1 LOX Load Complete

[catdlr]

Stage 2 LOX Load Complete

[catdlr]

GSE closeout

[catdlr]

F9 On Startup