SpaceX F9 : Starlink group 15-11 : VSFB SLC-4E : 10 December 2025 (11:40 UTC)

[Galactic Penguin SST]

Thread for the Starlink Group 15-11 launch.

Launch 10 December 2025, at 11:40:30 UTC (3:40 am PST), from Vandenberg SLC-4E, on booster 1082-18. The first stage successfully landed aboard Of Course I Still Love You.

Payload 27 Starlink V2.0 Mini satellites, to a 70.01 degrees inclination orbit on a southeastern trajectory.  Initial orbit 255 x 270 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]

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

SpaceX’s Falcon 9 is targeting the launch of 27 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.

This is the 18th flight for the first stage booster supporting this mission, which previously launched USSF-62, OneWeb Launch 20, NROL-145, and 14 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 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.

[zubenelgenubi]

Was:

Thread for the Starlink Group 15-11 launch.

Launch 10 December 2025, at 15:36 UTC (7:36 am PST), from Vandenberg SLC-4E, on booster 1082-18. The first stage will land aboard Of Course I Still Love You.

Payload 27 Starlink V2.0 Mini satellites, to a 70 degrees inclination orbit on a southeastern trajectory.  Initial orbit nnn x nnn km.

Now at https://www.spacex.com/launches/sl-15-11:
4 hour launch window, beginning at 08:54 UTC = 12:54 am PST

[Steven Pietrobon]

PDF of online press kit.

[zubenelgenubi]

https://celestrak.org/NORAD/elements/supplemental/
Supplemental GP Element Sets
Current as of 2025 Dec 07 19:16:30 UTC (Day 341)

Starlink G15-11 Pre-Launch   
Derived from a pre-launch Starlink-G15-11 state vector, provided by SpaceX. SupGP data is provided for the entire stack, as well as one for a single satellite.
Launch: 2025-12-10 08:54:00 UTC.
Deploy: 2025-12-10 09:55:24.660 UTC.
Launch window: 2025-12-10 08:54:00 UTC to 2025-12-10 12:54:00 UTC.

https://celestrak.org/NORAD/elements/supplemental/table.php?FILE=starlink-g15-11&FORMAT=tle
Pre-Launch Derived Orbit:
255 km x 270 km x 70.01 deg

[zubenelgenubi]

https://celestrak.org/NORAD/elements/supplemental/
Supplemental GP Element Sets
Current as of 2025 Dec 09 01:59:18 UTC (Day 343)

Starlink G15-11 Pre-Launch   
Derived from a pre-launch Starlink-G15-11 state vector, provided by SpaceX. SupGP data is provided for the entire stack, as well as one for a single satellite.

Launch: 2025-12-10 09:02:30 UTC.
Deploy: 2025-12-10 10:03:54.660 UTC.
Launch window: 2025-12-10 09:02:30 UTC to 2025-12-10 09:02:39 UTC.

Backup Launch Opportunity #1   
Launch: 2025-12-10 09:02:50 UTC.
Deploy: 2025-12-10 10:04:14.660 UTC.
Launch window: 2025-12-10 09:02:50 UTC to 2025-12-10 09:12:29 UTC.

Backup Launch Opportunity #2   
Launch: 2025-12-10 09:12:50 UTC.
Deploy: 2025-12-10 10:14:14.660 UTC.
Launch window: 2025-12-10 09:12:50 UTC to 2025-12-10 09:26:39 UTC.

Backup Launch Opportunity #3   
Launch: 2025-12-10 11:40:30 UTC.
Deploy: 2025-12-10 12:41:54.660 UTC.
Launch window: 2025-12-10 11:40:30 UTC to 2025-12-10 11:42:19 UTC.

Backup Launch Opportunity #4   
Launch: 2025-12-10 11:42:20 UTC.
Deploy: 2025-12-10 12:43:44.660 UTC.
Launch window: 2025-12-10 11:42:20 UTC to 2025-12-10 11:43:09 UTC.

Backup Launch Opportunity #5   
Launch: 2025-12-10 11:46:50 UTC.
Deploy: 2025-12-10 12:48:14.660 UTC.
Launch window: 2025-12-10 11:46:50 UTC to 2025-12-10 11:52:19 UTC.

[zubenelgenubi]

From https://www.spacex.com/launches/sl-15-11
Launch 11:40:30 UTC = 3:40:30 am PST
Backup Launch Opportunity #3

https://celestrak.org/NORAD/elements/supplemental/
Supplemental GP Element Sets
Current as of 2025 Dec 09 01:59:18 UTC (Day 343)

Starlink G15-11 Pre-Launch   
Derived from a pre-launch Starlink-G15-11 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 #3   
Launch: 2025-12-10 11:40:30 UTC.
Deploy: 2025-12-10 12:41:54.660 UTC.
Launch window: 2025-12-10 11:40:30 UTC to 2025-12-10 11:42:19 UTC.

Backup Launch Opportunity #4   
Launch: 2025-12-10 11:42:20 UTC.
Deploy: 2025-12-10 12:43:44.660 UTC.
Launch window: 2025-12-10 11:42:20 UTC to 2025-12-10 11:43:09 UTC.

Backup Launch Opportunity #5   
Launch: 2025-12-10 11:46:50 UTC.
Deploy: 2025-12-10 12:48:14.660 UTC.
Launch window: 2025-12-10 11:46:50 UTC to 2025-12-10 11:52:19 UTC.

[catdlr]

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-15-11
 Twitter:  https://x.com/i/broadcasts/1ypJdqNMyVpxW

SpaceX Re-broadcast alternatives on YouTube: 
Space Affairs:  https://www.youtube.com/@Space-Affairs/streams

There is no planned NSF Live coverage. Alternate Pre-Launch Coverage:  https://youtube.com/watch?v=y7m3YS5qJUY

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

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

[catdlr]

Current Satellite view of VSFB and the Pacific Coast

[catdlr]

Launch and landing Trajectory

[catdlr]

Hazard Map for this flight

[catdlr]

Pressing for Transporter Erector retraction started.

[catdlr]

Transporter Erector retraction started.

[catdlr]

Stage 1 LOX Load Complete

[catdlr]

Stage 2 LOX Load Complete

[catdlr]

GSE closeout

[catdlr]

F9 On Startup

[catdlr]

FD - go for launch

[catdlr]

Launch


https://twitter.com/ENNEPS/status/1998723058069287295

Elisar Priel
@ENNEPS

SpaceX has launched the Starlink Group 15-11 mission, aboard the Falcon 9 B1082-18 from SLC-4E at the Vandenberg Space Force Base (VSFB), in California, sending 28 Starlink v2 Mini satellites into Low Earth Orbit.

NASASpaceflight  Overview: https://nasaspaceflight.com/2025/12/launch-roundup-120825/

[catdlr]

Climb Out
MAX-Q

[catdlr]

MECO, Stage Separation, grid fin deployment

[catdlr]

Fairing Separation

[catdlr]

Booster Apogee

[catdlr]

Entry Burn

[catdlr]

Landing Burn and Landing

https://twitter.com/ENNEPS/status/1998724390373175385

[catdlr]

SECO,
Nominal Park(ing) Orbit Insertion callout,
End broadcast

[catdlr]

Payload for record (all the lights did turn on)

[catdlr]

Launch to Landing Highlight Video

[catdlr]

Full rebroadcast in 4K

[catdlr]

https://twitter.com/SpaceX/status/1998735904475680971

SpaceX
@SpaceX

Deployment of 27 @Starlink satellites confirmed

[catdlr]

That's it for me, back to bed.  Catch you all later for the RocketLab launch.

[catdlr]

SpaceX rocket upper stage seen in reflection during Starlink deployment

Dec 11, 2025
During the Starlink satellite batch deployment on Dec. 10, 2025, a reflection of the Falcon 9 rocket's 2nd stage can be seen.

Credit: SpaceX | edited by Space.com