UNITED STATES AIR FORCE

Delta II | Mars Pathfinder

SUCCESSDec 4, 1996 at 06:58 UTCDelta II →
PADSpace Launch Complex 17B
SITECape Canaveral SFS, FL, USA →
ORBITHeliocentric N/A
TYPERobotic Exploration
PROGRAMDiscovery Program

he MPF (Mars Pathfinder) (formerly known as the Mars Environmental Survey, or MESUR Pathfinder) is the second of NASA’s low-cost planetary Discovery missions. The mission consists of a stationary lander and a surface rover. The mission has the primary objective of demonstrating the feasibility of low-cost landings on and exploration of the Martian surface. This objective will be met by tests of communications between the rover and lander, and the lander and Earth, and tests of the imaging devices and sensors.

VEHICLE
Delta II
MISSION
Mars Pathfinder
MISSION TYPE
Robotic Exploration
TARGET ORBIT
Heliocentric N/A
PROGRAM
Discovery Program
COUNTRY
USA
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: 4a087c57-87cb-49c5-b9b9-fefeeb33d387
Reported date: Dec 4, 1996 at 06:58 UTC
Last synced: 7 hours ago
This launch date and time are confirmed by the launch provider. Countdown is active.
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MANUFACTURER
United Launch Alliance
VARIANT
7925
FLIGHTS
36
SUCCESSES
34
SUCCESS RATE
94.4%

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 | Mars Pathfinder launch?
The Delta II | Mars Pathfinder is scheduled for Wednesday, December 4, 1996 at 6:58 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 Mars Pathfinder?
The Delta II | Mars Pathfinder mission uses the Delta II rocket, manufactured by United Launch Alliance. The Delta II has flown 36 times with a 94.4% success rate.
Where is the Delta II | Mars Pathfinder launching from?
The launch takes place from Space Launch Complex 17B at Cape Canaveral SFS, FL, USA.
What orbit is Mars Pathfinder going to?
The Mars Pathfinder mission is targeting Heliocentric N/A.
Who is launching Mars Pathfinder?
The Delta II | Mars Pathfinder is operated by United States Air Force. It is part of the Discovery Program program.
Can I watch the Delta II | Mars Pathfinder 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 01:15 UTC
Launch added to tracker
Imported from Launch Library 2 API
Mar 29, 2026 01:15 UTC
Launch date set: Dec 4, 1996 at 06:58 UTC
NET (No Earlier Than) confirmed by United States Air Force
Mar 29, 2026 01:15 UTC
Launch completed successfully
Updated via Launch Library 2
Jun 3, 2022 14:04 UTC
Mars Pathfinder, the start of modern Mars exploration
The Pathfinder mission deployed the first-ever wheeled rover on Mars, and technologies developed for it paved the way for future, more sophisticated exploration of the…
Planetary Society
Jul 4, 2017 22:00 UTC
Mars Pathfinder Rover Team, 1994
Jet Propulsion Laboratory
Last data sync: 7 hours ago
Launch Library 27 hours ago
Launch ID: 4a087c57-87cb-49c5-b9b9-fefeeb33d387
Spaceflight News API7 hours ago
2 articles matched
Open-Meteo Weather7 hours ago
Pad weather at 28.45, -80.57

Mission Profile

Mars Pathfinder was a Delta II 7925 mission operated by United States Air Force that lifted off from Space Launch Complex 17B, Cape Canaveral SFS, FL, USA on December 4, 1996. The flight carried its payload on a robotic exploration mission to Heliocentric N/A. It was flown as part of the Discovery Program program. The launch was a success.