SpaceX F9 : Starlink group 17-1 : VSFB SLC-4E : 27 May 2025 (16:57 UTC)

[zubenelgenubi]

Thread for the Starlink Group 17-1 launch.

Launch 27 May 2025, at 16:57:15 UTC (9:57 am PDT), from Vandenberg SLC-4E, on booster 1082-13. The first stage has successfully landed aboard Of Course I Still Love You.

Payload 24 Starlink V2.0 Mini satellites, to a 97.61 degree inclination orbit on a southwestern trajectory.  Initial orbit 267 x 281 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

[zubenelgenubi]

Near-term SLC-4E schedule, UTC date:

Starlink 15-3    May 10  OCISLY  ✅️

Starlink 15-4    May 13  OCISLY  ✅️

Starlink 15-5    May 16  OCISLY

Starlink 11-16  May 20  OCISLY

NROL-48 may launch in May.  Otherwise, it's successive Starlink launches through the month.

We shall see if the short turnarounds continue.

[Galactic Penguin SST]

Marine navigation warnings from https://www.navcen.uscg.gov/msi has arrived showing a Starlink Group 17-1 launching towards the SSO track, evidentially to add to Group 3 satellites:

Sector San Diego, Exclusive Economic Zone (EEZ) / General / Safety Zones / Space Launches & Recovery
DISTRICT: 11
TITLE: Sector San Diego, Exclusive Economic Zone (EEZ) / General / Safety Zones / Space Launches & Recovery
SUB CATEGORY: Safety Zones
TYPE: Space Launches & Recovery
WATERWAY NAME: Sector San Diego, Exclusive Economic Zone (EEZ)
DESCRIPTION: Hazardous operations will be conducted for Space X g17-1 from 09:14 pm (sic) (local) 24 May to 1:37 pm (local) May 30, 2025. Hazardous operation areas are bounded by the following coordinates: 32.26666 N, -121.13333 W 32.30000 N, -121.18333 W 34.61666 N, -120.68333 W 34.66666 N, -120.61666 W 34.46666 N, -120.46666 W 32.26666 N, -121.13333 W (TO BEGINNING) Mariners are advised to remain clear of these areas for the duration of operations. For more details or comments contact Space X at [email protected] or on VHF-FM Chan. 05, 06 or 16.
DECIMAL LONGITUDE: null
DECIMAL LATITUDE: null

Sector San Diego, Exclusive Economic Zone (EEZ) - Sector San Diego, Territorial Sea / General / Safety Zones / Space Launches & Recovery
DISTRICT: 11
TITLE: Sector San Diego, Exclusive Economic Zone (EEZ) - Sector San Diego, Territorial Sea / General / Safety Zones / Space Launches & Recovery
SUB CATEGORY: Safety Zones
TYPE: Space Launches & Recovery
WATERWAY NAME: Sector San Diego, Territorial Sea
DESCRIPTION: Hazardous operations will be conducted for Space X g17-1 from 9:14 AM (local) 24 May, to 1:38 PM (local) May 30, 2025. Hazardous operation areas are bounded by the following coordinates: 29.25000 N, -121.95000 W 29.56666 N, -122.00000 W 29.95000 N, -121.73333 W 29.71666 N, -121.56666 W 29.21666 N, -121.76666 W 29.25000 N, -121.95000 W (TO BEGINNING) Mariners are advised to remain clear of these areas for the duration of operations. For more details or comments contact Space X at [email protected] or on VHF-FM Chan. 05, 06 or 16.
DECIMAL LONGITUDE: null
DECIMAL LATITUDE: null

Sector San Diego, Exclusive Economic Zone (EEZ) - Sector San Diego, Territorial Sea / General / Safety Zones / Space Launches & Recovery
DISTRICT: 11
TITLE: Sector San Diego, Exclusive Economic Zone (EEZ) - Sector San Diego, Territorial Sea / General / Safety Zones / Space Launches & Recovery
SUB CATEGORY: Safety Zones
TYPE: Space Launches & Recovery
WATERWAY NAME: Sector San Diego, Territorial Sea
DESCRIPTION: Hazardous operations will be conducted for Space X g17-1 from 9:14 AM (local) May 24 to 1:57 PM (local) May 30, 2025. Hazardous operation areas are bounded by the following coordinates: 29.26666 N, -121.95000 W 29.11666 N, -121.43333 W 28.48333 N, -121.46666 W 28.28333 N, -121.98333 W 28.73333 N, -122.31666 W 29.26666 N, -121.95000 W (TO BEGINNING) Mariners are advised to remain clear of these areas for the duration of operations. For more details or comments contact Space X at [email protected] or on VHF-FM Chan. 05, 06 or 16.
DECIMAL LONGITUDE: null
DECIMAL LATITUDE: null

[zubenelgenubi]

Falcon 9 first stages are now cleared for use up to forty times for non-human spaceflight missions, although that number is apparently more restricted for Cargo Dragon and Cygnus than these other payloads.

Available first stages, with UTC date of most recent recovery:
1075.18  Feb 1      Starlink 11-16
1071.25  Apr 12
1082.13  Apr 20
1063.26  Apr 28
1081.15  May 10
1088.7    May 13
1093.3    May 16   (maybe)

Edit May 24 UTC: It's B1082.13, skipping B1071.25.

[randomname]

NGA rocket launching notice for this launch.

190843Z MAY 25
NAVAREA XII 289/25(18).
EASTERN NORTH PACIFIC.
CALIFORNIA.
1. HAZARDOUS OPERATIONS, ROCKET LAUNCHING:
   A. 241614Z TO 242037Z MAY, ALTERNATE
      1614Z TO 2037Z DAILY 25 THRU 30 MAY
      IN AREA BOUND BY
      32-16.00N 121-08.00W, 32-18.00N 121-11.00W,
      34-37.00N 120-41.00W, 34-40.00N 120-37.00W,
      34-28.00N 120-28.00W.
   B. 241614Z TO 242038Z MAY, ALTERNATE
      1614Z TO 2038Z DAILY 25 THRU 30 MAY
      IN AREA BOUND BY
      29-15.00N 121-57.00W, 29-34.00N 122-00.00W,
      29-57.00N 121-44.00W, 29-43.00N 121-34.00W,
      29-13.00N 121-46.00W.
   C. 241614Z TO 242057Z MAY, ALTERNATE
      1614Z TO 2057Z DAILY 25 THRU 30 MAY
      IN AREA BOUND BY
      29-16.00N 121-57.00W, 29-07.00N 121-26.00W,
      28-29.00N 121-28.00W, 28-17.00N 121-59.00W,
      28-44.00N 122-19.00W.
2. CANCEL THIS MSG 302157Z MAY 25.//

[Galactic Penguin SST]

Delayed to NET May 25 per CADENA OIS:

Primary Launch Day 25 MAY 1614Z-2057Z Backup Launch Day (1) 26 MAY 1614Z-2057Z Backup Launch Day (2) 27 MAY 1614Z-2057Z Backup Launch Day (3) 28 MAY 1614Z-2057Z Backup Launch Day (4) 29 MAY 1614Z-2057Z Backup Launch Day (5) 30 MAY 1614Z-2057Z

[raptorx2]

Further delayed to May 27th per Cedena

[zubenelgenubi]

Further delayed to May 27th per Cadena

CADENA OIS
27/MAY/2025 16:14

Primary Launch Day 25 MAY 1614Z-2057Z
Backup Launch Day (1) 26 MAY 1614Z-2057Z
Backup Launch Day (2) 27 MAY 1614Z-2057Z
Backup Launch Day (3) 28 MAY 1614Z-2057Z
Backup Launch Day (4) 29 MAY 1614Z-2057Z
Backup Launch Day (5) 30 MAY 1614Z-2057Z

[Galactic Penguin SST]

Further delayed to May 27th per Cadena

CADENA OIS
27/MAY/2025 16:14

Primary Launch Day 25 MAY 1614Z-2057Z
Backup Launch Day (1) 26 MAY 1614Z-2057Z
Backup Launch Day (2) 27 MAY 1614Z-2057Z
Backup Launch Day (3) 28 MAY 1614Z-2057Z
Backup Launch Day (4) 29 MAY 1614Z-2057Z
Backup Launch Day (5) 30 MAY 1614Z-2057Z

CADENA OIS' format isn't clear about the delay but this NOTAM does confirm it:

A0663/25 NOTAMN
Q) NTTT/QRDCA/IV/BO/W/000/999/2742S15610W148
A) NTTT
B) 2505271757 C) 2505312232
D) 1757-2232
E) TEMPORARY DANGEROUS AREA DUE TO ATMOSPHERIC RE-ENTRY
STARLINK 17-1 UPPER STAGE IN TAHITI FIR WITHIN AN AREA BOUNDED
BY FOLLOWING POINTS: 
2523S15656W - 2550S15433W - 3000S15520W - 3000S15700W -
2541S15700W - 2523S15656W
THIS ACTIVITY IMPACTS NZZO AS WELL.
AIRSPACE USERS ARE ADVISED OF THE PARTICULARLY DANGEROUS NATURE
 OF THE ACTIVITY AND ARE STRONGLY INVITED TO AVOID THE AREA
 DURING THE ACTIVITY TIME SLOT.
OPERATORS ARE INVITED TO FILE THEIR FLIGHT PLAN WITH A TRAJECTORY
THAT ENSURES THAT THE AREA IS CIRCUMNAVIGATED.

THE FRENCH VERSION OF THIS NOTAM IS C1220/25
F) SFC G) UNL

[Galactic Penguin SST]

https://www.spacex.com/launches/mission/?missionId=sl-17-1

SpaceX is targeting Tuesday, May 27 for a Falcon 9 launch of 24 Starlink satellites to low-Earth orbit from Space Launch Complex 4 East (SLC-4E) at Vandenberg Space Force Base in California. Liftoff is targeted for 9:14 a.m. PT, with backup opportunities available until 1:14 p.m. PT. If needed, additional launch opportunities are also available on Wednesday, May 28 starting at 9:14 a.m. PT.

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 new X TV app.

This will be the 13th flight for the first stage booster supporting this mission, which previously launched USSF-62, OneWeb Launch 20, NROL-145, and nine Starlink missions. (=B1082-13) 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.

[Steven Pietrobon]

PDF of online press kit.

[zubenelgenubi]

Adjustment to primary launch time:
https://celestrak.org/NORAD/elements/supplemental/

Starlink G17-1 Pre-Launch
Derived from a pre-launch Starlink-G17-1 state vector, provided by SpaceX. SupGP data is provided for the entire stack, as well as one for a single satellite.

Launch: 2025-05-27 16:26:10 UTC.
Deploy: 2025-05-27 17:29:18.060 UTC.
Launch window: 2025-05-27 16:26:10 UTC to 2025-05-27 16:27:09 UTC.

Backup Launch Opportunity #1
Launch: 2025-05-27 16:30:00 UTC.
Deploy: 2025-05-27 17:33:08.060 UTC.
Launch window: 2025-05-27 16:30:00 UTC to 2025-05-27 16:30:59 UTC.

Backup Launch Opportunity #2
Launch: 2025-05-27 16:56:10 UTC.
Deploy: 2025-05-27 17:59:18.060 UTC.
Launch window: 2025-05-27 16:56:10 UTC to 2025-05-27 16:56:39 UTC.

Backup Launch Opportunity #3
Launch: 2025-05-27 18:09:00 UTC.
Deploy: 2025-05-27 19:12:08.060 UTC.
Launch window: 2025-05-27 18:09:00 UTC to 2025-05-27 18:09:59 UTC.

Backup Launch Opportunity #4
Launch: 2025-05-27 18:10:10 UTC.
Deploy: 2025-05-27 19:13:18.060 UTC.
Launch window: 2025-05-27 18:10:10 UTC to 2025-05-27 18:10:39 UTC.

Backup Launch Opportunity #5
Launch: 2025-05-27 18:48:00 UTC.
Deploy: 2025-05-27 19:51:08.060 UTC.
Launch window: 2025-05-27 18:48:00 UTC to 2025-05-27 18:48:49 UTC.

And, https://celestrak.org/NORAD/elements/supplemental/table.php?FILE=starlink-g17-1&FORMAT=tle
Pre-Launch Derived Orbit: 267 km x 281 km x 97.61 deg

Edited

[starbase]

Anyone knows if these Starlinks are of the v2 Mini Optimized chassis?

[zubenelgenubi]

Launch windows subtly adjusted, but prime launch window opening is unchanged.

https://celestrak.org/NORAD/elements/supplemental/
Supplemental GP Element Sets
Current as of 2025 May 26 15:41:57 UTC (Day 146)

Starlink G17-1 Pre-Launch   
Derived from a pre-launch Starlink-G17-1 state vector, provided by SpaceX. SupGP data is provided for the entire stack, as well as one for a single satellite.

Launch: 2025-05-27 16:26:10 UTC.
Deploy: 2025-05-27 17:29:18.060 UTC.
Launch window: 2025-05-27 16:26:10 UTC to 2025-05-27 16:27:09 UTC.

Backup Launch Opportunity #1   
Launch: 2025-05-27 16:29:30 UTC.
Deploy: 2025-05-27 17:32:38.060 UTC.
Launch window: 2025-05-27 16:29:30 UTC to 2025-05-27 16:30:29 UTC.

Backup Launch Opportunity #2   
Launch: 2025-05-27 16:57:00 UTC.
Deploy: 2025-05-27 18:00:08.060 UTC.
Launch window: 2025-05-27 16:57:00 UTC to 2025-05-27 16:57:39 UTC.

Backup Launch Opportunity #3   
Launch: 2025-05-27 18:09:00 UTC.
Deploy: 2025-05-27 19:12:08.060 UTC.
Launch window: 2025-05-27 18:09:00 UTC to 2025-05-27 18:09:59 UTC.

Backup Launch Opportunity #4   
Launch: 2025-05-27 18:47:50 UTC.
Deploy: 2025-05-27 19:50:58.060 UTC.
Launch window: 2025-05-27 18:47:50 UTC to 2025-05-27 18:48:49 UTC.

[Galactic Penguin SST]

Update:

Liftoff is targeted for 9:57 a.m. PT, with backup opportunities available until 1:14 p.m. PT.

[catdlr]

Updated Video Links:

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

SpaceX direct live broadcast on Twitter:  https://x.com/i/broadcasts/1BdxYqMBNoExX

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

Alternate Pre-Launch Coverage:  https://youtube.com/watch?v=yxQyNozzRR0

Although there is no planned NSF coverage livestream link, NSF may interrupt the Starship IFT-9 countdown live stream to provide coverage for this launch: https://youtube.com/watch?v=uiCgZrc51i4

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 (from local resident in Santa Barbara - I'll post if available)

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

[zubenelgenubi]

Starlink G17-1 Pre-Launch   

Backup Launch Opportunity #2   
Launch: 2025-05-27 16:57:00 UTC.
Deploy: 2025-05-27 18:00:08.060 UTC.
Launch window: 2025-05-27 16:57:00 UTC to 2025-05-27 16:57:39 UTC.

[catdlr]

Launch

https://twitter.com/NASASpaceflight/status/1927409028881072475

[catdlr]

Max-Q

[catdlr]

MECO and Staging