Launch site and date
Apollo 13 launched from Kennedy Space Center, Florida, departing Earth on April 11, 1970, at 13:13 UTC. The mission lifted off from Launch Complex 39 Pad A (LC‑39A) atop a Saturn V rocket, bound for a lunar landing that would become a famed survival story after an in‑flight emergency. This Florida coastal site was NASA’s primary launch location for Apollo crewed missions, chosen for its proximity to the equator, clear flight corridors over the Atlantic, and extensive infrastructure.
Why launch from Kennedy Space Center
NASA selected Kennedy Space Center for Apollo launches because of its geography and engineering requirements. A launch near the equator gives a valuable eastward boost from Earth’s rotation, and the Atlantic flight path minimizes risk to populated areas. The expansive site supported the massive Saturn V rocket, the command and service module, and the lunar module, while nearby operations buildings and crawler-transporters enabled assembly and transport to the pad. These factors remain central to choosing launch locations for heavy-lift crewed missions.
Pre-launch timeline at LC‑39A
In the months before liftoff, Apollo 13’s Saturn V was assembled and tested at Kennedy Space Center. After transporting from the Vehicle Assembly Building, the rocket was stacked at LC‑39A. Final crew checks, suit tests, and countdown rehearsals occurred in the firing room and spacecraft operations areas. The rigorous schedule exemplified NASA’s approach to crewed lunar missions, with each step designed to mitigate risk before clearing the pad.
Liftoff and ascent
At 13:13 UTC on April 11, 1970, the Saturn V’s five F‑1 engines ignited, and Apollo 13 departed LC‑39A with a thunderous roar. The first stage burned for about 2.5 minutes, lifting the rocket through the dense lower atmosphere. The second stage then continued the ascent, placing the spacecraft into Earth orbit before the third stage fired to send Apollo 13 toward the Moon. The ascent profile followed standard practices for Saturn V crewed launches, ensuring trajectory accuracy and crew safety.
Verified mission details
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Launch pad | LC‑39A, Kennedy Space Center, Florida | NASA official records |
| Launch vehicle | Saturn V SA‑508 | Mission documentation |
| Launch date and time (UTC) | April 11, 1970, 13:13 UTC | Mission timeline |
| Launch location | Kennedy Space Center, Florida, United States | Historical archives |
| Mission objective | Lunar flyby after in‑flight oxygen tank explosion; safe return | NASA reports |
| Crew | James Lovell, John Swigert, Fred Haise | NASA crew assignments |
Post‑launch flight profile
After clearing the pad, Apollo 13 followed a translunar injection trajectory, entering Earth orbit and then heading toward the Moon. The mission proceeded normally until an oxygen tank explosion on April 13 forced a abort of the lunar landing and a focus on safe return. The crew used the Lunar Module as a lifeboat, looping around the Moon and returning to Earth, splashing down in the Pacific on April 17. The launch from LC‑39A remains the starting point of this historic journey.
Modern context and legacy
Today, LC‑39A at Kennedy Space Center continues as a key launch site for NASA and commercial partners. The pad has been renovated for next‑generation crewed flights, showing the lasting importance of the location that sent Apollo 13 forward. The mission’s safe return reinforced confidence in Apollo hardware and operations, and the launch site’s role is preserved in historical records, tours, and educational programs. Understanding where Apollo 13 launched from highlights both the engineering of the Saturn V and the choice of Florida’s coast for human lunar exploration.
Quick comparison: Apollo 13 vs other Apollo missions
- Launch vehicle: Saturn V (same as Apollo 8, 10, 11, 14, 15, 16, 17)
- Launch pad: LC‑39A (shared with later Apollo and Space Shuttle missions)
- Launch site: Kennedy Space Center, Florida (consistent across Apollo program)
- Mission outcome: Safe return after in‑flight abort (unique among Apollo flights)
Summary
Apollo 13 launched from Launch Complex 39A at Kennedy Space Center in Florida on April 11, 1970. The Saturn V rocket lifted off from this coastal pad, initiating a mission that would pivot from a planned lunar landing to a dramatic survival scenario. Choosing Kennedy Space Center was driven by geography, infrastructure, and safety considerations that remain relevant for crewed spaceflight today. The launch site and precise timeline are well documented by NASA and historical records, confirming the details above.