Apollo 15

Apollo 15 was the ninth crewed flight of NASA's Apollo program. It was the fourth mission to land on the surface of the Moon and the first J-Type mission. Apollo 15 was launched on July 26, 1971.^[16]: 77 Alfred Worden stayed in orbit in the Command Module, Endeavour, while the Lunar Module, Falcon, landed at Hadley Base, with David Scott and James Irwin. The astronauts used the first Lunar Roving Vehicle to travel on the Moon.^[17] This vehicle was specially designed to work in a vacuum, with a wide range of temperatures across rough ground. They travelled a distance of 17.5 mi (28 km) on the Moon.^[18] They spent three days (66 hours, 55 minutes) on the Moon. They were able to collect a lot of rock samples, including a core sample from at least 10 ft (3 m) deep.^[18]

Apollo 15

Jim Irwin salutes the United States flag on the Moon, August 1, 1971
Mission type	Crewed lunar landing
Operator	NASA[1]
COSPAR ID	CSM: 1971-063A LM: 1971-063C[2]
SATCAT no.	CSM: 5351 LM: 5366[2]
Mission duration	12 days, 7 hours, 11 minutes, 53 seconds[3]
Spacecraft properties
Spacecraft	Apollo CSM-112 Apollo LM-10[2]
Manufacturer	CSM: North American Rockwell[4] LM: Grumman[5]
Launch mass	48,599 kilograms (107,142 lb)
Landing mass	5,321 kilograms (11,731 lb)[6]
Crew
Crew size	3
Members	David R. Scott Alfred M. Worden James B. Irwin
Callsign	CSM: Endeavour LM: Falcon
EVAs	1 in cislunar space and 4 on the lunar surface[7]
EVA duration	39 minutes, 7 seconds[7] Spacewalk to retrieve film cassettes
Start of mission
Launch date	July 26, 1971, 13:34:00.6 (1971-07-26UTC13:34Z) UTC[8]
Rocket	Saturn V AS-510[9]
Launch site	Kennedy LC-39A
End of mission
Recovered by	USS Okinawa[3]
Landing date	August 7, 1971, 20:45:53 (1971-08-07UTC20:45:54Z) UTC[3]
Landing site	North Pacific Ocean 26°7′N 158°8′W[3]
Orbital parameters
Reference system	Selenocentric[10]
Periselene	101.5 kilometers (54.8 nmi)[10]
Aposelene	120.8 kilometers (65.2 nmi)[10]
Inclination	23 degrees[10]
Epoch	July 30, 1971[10]
Lunar orbiter
Spacecraft component	Command and service module
Orbital insertion	July 29, 1971, 20:05:46 UTC[7]
Orbital departure	August 4, 1971, 21:22:45 UTC[7]
Orbits	74[11]
Lunar lander
Spacecraft component	Lunar module
Landing date	July 30, 1971, 22:16:29 UTC[7]
Return launch	August 2, 1971, 17:11:23 UTC[7]
Landing site	26.1322°N 3.6339°E / 26.1322; 3.6339[12]
Sample mass	77 kilograms (170 lb)[3]
Surface EVAs	4 (including standup)
EVA duration	19 hours, 7 minutes, 53 seconds[7] Standup: 33 minutes, 7 seconds[7] First: 6 hours, 32 minutes, 42 seconds[13] Second: 7 hours, 12 minutes, 14 seconds[14] Third: 4 hours, 49 minutes, 50 seconds[15]
Lunar rover
Distance covered	27.9 kilometers (17.3 mi)[3]
Docking with LM
Docking date	July 26, 1971, 17:07:49 UTC[7]
Undocking date	July 30, 1971, 18:13:16 UTC[7]
Docking with LM Ascent Stage
Docking date	August 2, 1971, 19:10:25 UTC[7]
Undocking date	August 3, 1971, 01:04:01 UTC[7]
Payload
Particles and Fields Subsatellite (PFS-1) Lunar Roving Vehicle
Mass	PFS-1: 78.5 pounds (35.6 kg) LRV: 463 pounds (210 kg)[11]
Left to right: Scott, Worden, Irwin Apollo program ← Apollo 14 Apollo 16 →