UNITED STATES AIR FORCE

Delta 7425-9.5 | Mars Climate Orbiter

SUCCESS Delta II →
Dec 11, 1998 at 18:45 UTC
Heliocentric N/A Robotic Exploration Cape Canaveral SFS, FL, USA 100% success
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Live Orbit
Fullscreen
Mission Control3D trajectory · Live telemetry · AI narrator · Booster tracking
PADSpace Launch Complex 17A
SITECape Canaveral SFS, FL, USA →
ORBITHeliocentric N/A
TYPERobotic Exploration

The Mars Surveyor ’98 program is comprised of two spacecraft launched separately, the MCO (Mars Climate Orbiter, formerly the Mars Surveyor ’98 Orbiter) and the MPL (Mars Polar Lander, formerly the Mars Surveyor ’98 Lander). The two missions were to study the Martian weather, climate, and water and carbon dioxide budget, in order to understand the reservoirs, behavior, and atmospheric role of volatiles and to search for evidence of long-term and episodic climate changes. The Mars Climate Orbiter was destroyed when a navigation error caused it to miss its target altitude at Mars by 80 to 90 km, instead entering the Martian atmosphere at an altitude of 57 km during the orbit insertion maneuver.

VEHICLE
Delta II
MISSION
Mars Climate Orbiter
MISSION TYPE
Robotic Exploration
TARGET ORBIT
Heliocentric N/A
COUNTRY
USA
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: 950b7606-4c59-4c67-8524-6ffc4a3539c1
Reported date: Dec 11, 1998 at 18:45 UTC
Last synced: 2 minutes ago
This launch date and time are confirmed by the launch provider. Countdown is active.
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MANUFACTURER
McDonnell Douglas
VARIANT
7425-9.5
FLIGHTS
3
SUCCESSES
3
SUCCESS RATE
100%

Delta II was an expendable launch system, originally designed and built by McDonnell Douglas. Delta II was part of the Delta rocket family and entered service in 1989. Delta II vehicles included the Delta 6000, and the two later Delta 7000 variants ("Light" and "Heavy"). The rocket flew its final mission ICESat-2 on 15 September 2018, earning the launch vehicle a streak of 100 successful missions in a row, with the last failure being GPS IIR-1 in 1997.

When is the Delta 7425-9.5 | Mars Climate Orbiter launch?
The Delta 7425-9.5 | Mars Climate Orbiter is scheduled for Friday, December 11, 1998 at 6:45 PM 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 Climate Orbiter?
The Delta 7425-9.5 | Mars Climate Orbiter mission uses the Delta II rocket, manufactured by McDonnell Douglas. The Delta II has flown 3 times with a 100% success rate.
Where is the Delta 7425-9.5 | Mars Climate Orbiter launching from?
The launch takes place from Space Launch Complex 17A at Cape Canaveral SFS, FL, USA.
What orbit is Mars Climate Orbiter going to?
The Mars Climate Orbiter mission is targeting Heliocentric N/A.
Who is launching Mars Climate Orbiter?
The Delta 7425-9.5 | Mars Climate Orbiter is operated by United States Air Force.
Can I watch the Delta 7425-9.5 | Mars Climate Orbiter 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 01:16 UTC
Launch added to tracker
Imported from Launch Library 2 API
Mar 29, 2026 01:16 UTC
Launch date set: Dec 11, 1998 at 18:45 UTC
NET (No Earlier Than) confirmed by United States Air Force
Mar 29, 2026 01:16 UTC
Launch completed successfully
Updated via Launch Library 2
Last data sync: 2 minutes ago
Launch Library 22 minutes ago
Launch ID: 950b7606-4c59-4c67-8524-6ffc4a3539c1
Open-Meteo Weather5 days ago
Pad weather at 28.45, -80.57

Mission Profile

Mars Climate Orbiter was a Delta II 7425-9.5 mission operated by United States Air Force that lifted off from Space Launch Complex 17A, Cape Canaveral SFS, FL, USA on December 11, 1998. The flight carried its payload on a robotic exploration mission to Heliocentric N/A. The launch was a success.