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TRACERS

© SpaceX

All launches
SpaceX

TRACERS

Success

Falcon 9 Block 5
T-minus to liftoff

-

00

HOURS

:

00

MINUTES

:

00

SECONDS

Wednesday July 23 2025, 18:13:00 UTC
StatusSuccess
VehicleFalcon 9 Block 5
OrbitSun-Synchronous Orbit
PadSpace Launch Complex 4E
Loading map…

Mission

NASA's Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites (TRACERS) mission, consisting of two identical satellites that will orbit Earth in tandem (one following the other), will help understand magnetic re-connection and its effects in Earth’s atmosphere. Magnetic re-connection occurs when activity from the Sun interacts with Earth’s magnetic field. By understanding this process, scientists will be able to better understand and prepare for impacts of solar activity on Earth. Hitchhiking small satellites: * Athena EPIC (Economical Payload Integration Cost) * Polylingual Experimental Terminal (PExT) * Relativistic Electron Atmospheric Loss (REAL)

Launch Timeline

Countdown

T-00:38:00

GO for Prop Load

T-00:35:00

Prop Load

T-00:35:00

Stage 1 LOX Load

T-00:16:00

Stage 2 LOX Load

T-00:07:00

Engine Chill

T-00:01:00

Startup

T-00:01:00

Tank Press

T-00:00:45

GO for Launch

T-00:00:03

Ignition

In-flight

T+00:00:00

Liftoff

T+00:01:12

Max-Q

T+00:02:13

MECO

T+00:02:17

Stage 2 Separation

T+00:02:21

Stage 1 Flip

T+00:02:24

SES-1

T+00:02:30

Booster Boostback Burn Startup

T+00:02:56

Fairing Separation

T+00:03:26

Booster Boostback Burn Shutdown

T+00:06:04

Entry Burn Startup

T+00:06:21

Entry Burn Shutdown

T+00:07:12

Stage 1 Landing Burn

T+00:07:46

Stage 1 Landing

T+00:08:02

SECO-1

T+00:50:44

SES-2

T+00:50:47

SECO-2

T+00:54:30

Payload Separation

T+00:54:50

Payload Separation

T+01:05:40

SES-3

T+01:05:41

SECO-3

T+01:30:07

SES-4

T+01:30:08

SECO-4

T+01:34:26

Payload Separation

T+01:40:41

Payload Separation

T+01:44:46

Payload Separation

T+01:45:06

Payload Separation

T+01:45:26

Payload Separation

Quick facts

VehicleFalcon 9 Block 5
OrbitSun-Synchronous Orbit
PadSpace Launch Complex 4E
SiteVandenberg SFB, CA, USA
WindowWednesday July 23 2025, 18:13:00 UTC→Wednesday July 23 2025, 19:10:00 UTC

Vehicle

FamilyFalcon
Height70 m
Diameter3.7 m
Stages2
ReusableYes
LEO capacity22,800 kg
Track record606/607 successful
Landings593/598
Launch CodexDossier

Every source for this mission in one place — news, social, references, notes & the exact timeline.

Explore

Reusable Hardware

All boosters →
First Stage · Flight-provenB1081
active16th flight
Flights25
Landings25/25100%
Fastest turn24d 19h
Recovered · RTLS · LZ-4· 0 km downrange
40d 16h since last flight

Launched Crew-7 on its first flight.

Previous flights · 25
  1. #26Starlink Group 17-52+33d 22hOCISLYJul 29, 2026
  2. #25Starlink Group 17-45+49d 23hOCISLYJun 25, 2026
  3. #24Starlink Group 17-29+40d 4hOCISLYMay 6, 2026
  4. #23Starlink Group 17-17+39d 21hOCISLYMar 26, 2026
  5. #22Starlink Group 17-13+42d 23hOCISLYFeb 15, 2026
Acquiring satellite view…
Trajectory unknown
Space Launch Complex 4E
Vandenberg SFB, CA, USA
34.632, -120.611
Scrub riskLOW
Go92%
Q

Q's read

Weather & scrubLOW risk
Weather Go92%LL2 Go99%Wind2 m/sGusts2 m/sCloud3%Temp14°C

Limiting rule: Droneship recovery upper limit on sea state.

6.2 ≥ 6 ft significant wave height