UNITED STATES AIR FORCE

Delta II | Messenger

SUCCESS Delta II →
Aug 3, 2004 at 06:15 UTC
Low Earth Orbit Planetary Science Cape Canaveral SFS, FL, USA 100% success
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Live Orbit
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Mission Control3D trajectory · Live telemetry · AI narrator · Booster tracking
PADSpace Launch Complex 17B
SITECape Canaveral SFS, FL, USA →
ORBITLow Earth Orbit
TYPEPlanetary Science
PROGRAMDiscovery Program

MESSENGER was a NASA robotic space probe that orbited the planet Mercury between 2011 and 2015, studying Mercury’s chemical composition, geology, and magnetic field. The name is a backronym for “MErcury Surface, Space ENvironment, GEochemistry, and Ranging”, and a reference to the messenger god Mercury from Roman mythology.

VEHICLE
Delta II
MISSION
Messenger
MISSION TYPE
Planetary Science
TARGET ORBIT
Low Earth Orbit
PROGRAM
Discovery Program
COUNTRY
USA
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: 8633d5f0-ea8b-4f9c-a78b-5a48406f44df
Reported date: Aug 3, 2004 at 06:15 UTC
Last synced: 4 minutes ago
This launch date and time are confirmed by the launch provider. Countdown is active.
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MANUFACTURER
United Launch Alliance
VARIANT
7925H-9.5
FLIGHTS
3
SUCCESSES
3
SUCCESS RATE
100%

Delta II is an American space launch system developed by McDonnell Douglas, now part of the Delta rocket family operated by United Launch Alliance. With more than 150 missions and a nearly perfect track record, Delta II has established itself as one of the most successful orbital launch systems.

When is the Delta II | Messenger launch?
The Delta II | Messenger is scheduled for Tuesday, August 3, 2004 at 6:15 AM UTC. This is the NET (No Earlier Than) time and may be subject to change. Current status: SUCCESS.
What rocket is being used for Messenger?
The Delta II | Messenger mission uses the Delta II rocket, manufactured by United Launch Alliance. The Delta II has flown 3 times with a 100% success rate.
Where is the Delta II | Messenger launching from?
The launch takes place from Space Launch Complex 17B at Cape Canaveral SFS, FL, USA.
What orbit is Messenger going to?
The Messenger mission is targeting Low Earth Orbit.
Who is launching Messenger?
The Delta II | Messenger is operated by United States Air Force. It is part of the Discovery Program program.
Can I watch the Delta II | Messenger launch live?
Yes. Visit the launch detail page on Space Launch Live for embedded YouTube webcasts, replay videos, and links to live coverage from SpaceX, NASA, NASASpaceflight, and other channels.
Mar 29, 2026 01:08 UTC
Launch added to tracker
Imported from Launch Library 2 API
Mar 29, 2026 01:08 UTC
Launch date set: Aug 3, 2004 at 06:15 UTC
NET (No Earlier Than) confirmed by United States Air Force
Mar 29, 2026 01:08 UTC
Launch completed successfully
Updated via Launch Library 2
Aug 2, 2024 16:00 UTC
MESSENGER u2013 From Setbacks to Success
The excerpts below are taken from Discovery Program oral history interviews conducted in 2009 by Dr. Susan Niebur and tell the story of the hurdles…
NASA
Jul 25, 2020 19:52 UTC
Galileo Messenger Archive
Planetary Society
Last data sync: 4 minutes ago
Launch Library 24 minutes ago
Launch ID: 8633d5f0-ea8b-4f9c-a78b-5a48406f44df
Spaceflight News API20 minutes ago
3 articles matched
Open-Meteo Weather24 hours ago
Pad weather at 28.45, -80.57

Mission Profile

Messenger was a Delta II 7925H-9.5 mission operated by United States Air Force that lifted off from Space Launch Complex 17B, Cape Canaveral SFS, FL, USA on August 3, 2004. The flight carried its payload on a planetary science mission to Low Earth Orbit. It was flown as part of the Discovery Program program. The launch was a success.