Falcon 9 Block 5 — mission imagery
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TBD

COSI (Compton Spectrometer and Imager)

Falcon 9 Block 5SpaceXSpace Launch Complex 40
August 2027 · Date and time TBD
Calendar available when time is confirmed

NextGo for Prop LoadT-35:00

Time to launch

Schedule watchTracking updates
August 2027Exact time confirmed closer to launch
Launch Window Confidence
46% — Uncertain

Mission Brief

Wide-field gamma-ray telescope designed to study energetic phenomena in the Milky Way and beyond, including the creation and destruction of matter and antimatter and the final stages of the lives of stars. The mission is a collaboration between the University of California, Berkeley’s Space Sciences Laboratory, the University of California, San Diego, the Naval Research Laboratory, NASA’s Goddard Space Flight Center, and Northrop Grumman.

PayloadCOSI (Compton Spectrometer and Imager)
OrbitLow Earth Orbit
CustomerSpaceX
Stages2
PadSpace Launch Complex 40, Cape Canaveral SFS, FL, USA

Mission Timeline

0 / 200%
Up next · Countdown

Go for Prop Load

Launch director gives the go to begin fueling

T-35:00
11:25 PM UTC
  • Go for Prop LoadT-35:00
  • RP-1 Loading BeginsT-35:00
  • Stage 1 LOX Loading BeginsT-35:00

Ground vector

Launch site

Site locked

Space Launch Complex 40

Cape Canaveral SFS, FL, USA

Global range
SITE LOCK
Latitude
28.562°N
Longitude
80.577°W

Range Weather

Launch commit criteria

Clear
Watch
TrackingNo active constraints
Weather Rules

Tracking no weather issues at this time.

Primary concern
No weather issues
Rule count
0
Temperature
Not reported
Surface wind
Not reported
Window

12:00 AM UTC - 12:00 AM UTC

Vehicle

Falcon 9 Block 5

Profile →
Height70 m
LEO Payload22,800 kg
Launches842
Successes699

Provider

USA • Founded 2002

Schedule History

No meaningful launch-time or status changes recorded.