Image: NASA / JPL
Surveyor 1
Mission Profile
| Launch date | 1966-05-30 |
|---|---|
| Launch site | Cape Kennedy Air Force Station, Launch Complex 36A, Florida |
| Launch vehicle | Atlas-Centaur AC-10 |
| Spacecraft | Surveyor 1 — three-leg lander with throttleable verniers |
| Target | Moon |
| Type | Robotic |
| End date | 1967-01-07 |
| Recovery | Permanent on lunar surface — Flamsteed P crater, Oceanus Procellarum |
| Landing site | 2.46°S, 43.32°W (Flamsteed P crater, Oceanus Procellarum) |
| Surface stay | ~6 weeks of active surface operations; engineering contacts through 7 January 1967 |
| Mass | 995.2 kg launch; 294.3 kg landed |
| Duration | ~6 weeks active; engineering contacts to 7 Jan 1967 |
| Partners | JPL (program management), Hughes Aircraft (spacecraft prime), Thiokol (retro motor), Convair / Atlas-Centaur |
| Instruments | 600-line slow-scan TV camera, Strain-gauge footpads (soil mechanics), Vernier-engine throttle telemetry |
Overview
Surveyor 1 was the United States' first soft lunar landing and only the second in history after Luna 9 four months earlier. Built by Hughes Aircraft under JPL management, the 995-kg spacecraft departed Cape Kennedy on Atlas-Centaur AC-10 on 30 May 1966 and reached the Moon on a direct-ascent trajectory of just 63 hours, 36 minutes — touching down inside Flamsteed P crater in Oceanus Procellarum on 2 June 1966 at 06:17 UTC. The mission's primary purpose was reconnaissance for Apollo: NASA needed empirical evidence that the lunar surface would bear the weight of a crewed Lunar Module, and Surveyor 1's three crushable footpads provided exactly that data, sinking only a few centimeters into the regolith. The spacecraft's slow-scan television camera returned 11,240 images over the next six weeks, including the first color photograph ever taken from the Moon's surface. Surveyor 1 survived its first lunar night, was reactivated on 7 July, and continued sporadic engineering contact until 7 January 1967. The entire seven-mission Surveyor program (1966 – 1968) photographed candidate Apollo landing sites and certified the southern Oceanus Procellarum region where Apollo 12 ultimately landed — within 163 m of Surveyor 3.
Mission Objectives
Achieve the first US soft landing on the lunar surface
achieved
Validate Atlas-Centaur as a precursor launch system for Apollo precursor cargo
achieved
Photograph the lunar surface to certify Apollo landing sites
achieved
Measure soil bearing strength via footpad mechanics
achieved
Survive at least one lunar night and resume operations
achieved
Vehicle Specifications
Spacecraft (launch mass)
- Mass
- 995.2 kg
Lunar transit configuration prior to retrofire.
Spacecraft (landed mass)
- Mass
- 294.3 kg
After main retro and vernier propellant expended.
Main retro motor
Thiokol TE-364 solid; jettisoned ~11 km altitude after burnout.
Vernier engines (3)
Liquid MMH/MON-10; throttleable for terminal descent.
Landing legs (3)
Aluminum honeycomb crushable footpads — first western planetary lander to use this architecture.
TV camera
600-line slow-scan with photometric/colorimetric filters; returned 11,240 frames.
Key Milestones
1966-05-30
Launch on Atlas-Centaur AC-10 from Cape Kennedy LC-36A at 14:41 UTC
1966-05-30
Centaur translunar injection burn
1966-06-01
Single mid-course correction maneuver
1966-06-02
Touchdown in Flamsteed P at 06:17 UTC
1966-06-02
First images downlinked within hours of landing
1966-06-14
Operations paused for first lunar night
1966-07-07
Reactivated for second lunar day
1966-07-13
Final imaging; mission terminated due to battery voltage drop
Key Achievements
First US soft lunar landing — four months after Luna 9
First color photograph from the Moon's surface
11,240 images returned — the largest planetary photographic dataset of its era
Confirmed surface bearing strength adequate for Apollo Lunar Module footpads
First throttleable liquid vernier engines used for terminal lunar descent
Survived two lunar nights — sporadic engineering contact maintained until January 1967
Photo Gallery
Legacy & Significance
Surveyor 1 did for Apollo what no orbital reconnaissance could: it touched the ground and reported back that the ground was solid. Before Surveyor, NASA's worst-case Apollo design assumption was that the LM might sink meter-deep in fluffy regolith. Surveyor's footpads barely indented the surface — a single empirical data point that let NASA finalize the LM landing-gear stroke length, shock-absorber stiffness, and footpad area. The seven-mission Surveyor program photographed candidate sites and certified Apollo 12, which landed 163 m from Surveyor 3 and brought back pieces of it. Architecturally, Surveyor's three-leg throttleable-vernier descent template propagated through Viking, Mars Pathfinder, Phoenix, InSight, and even the Apollo LM itself. It is the unsung scaffolding mission of the entire Apollo program — the reason July 1969 was possible.
