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Loading contentHow we reached the asteroids and comets — the flybys, orbiters, landers, impactors, and sample-return missions that turned points of light into explored worlds. The engineering bridge across the small-body arc, connecting spacecraft and rockets to the asteroids, comets, and meteorites they studied.
Missions that brought material from an asteroid or comet back to Earth — Hayabusa, Hayabusa2, OSIRIS-REx, and Stardust.
6 missionsFlybys, orbiters, and impactors that explored comets — from Giotto at Halley to Rosetta at 67P.
8 missionsMissions to the asteroids — main-belt giants, near-Earth rubble piles, metal worlds, and the Jupiter Trojans.
6 missionsMissions that test or study how to deflect a hazardous asteroid — DART, Hera, and their forerunners.
4 missionsMissions in cruise, planned, or proposed — MMX, Comet Interceptor, DESTINY+, and studied concepts.
6 missionsThe completed missions that opened up small-body exploration.
9 missionsSmall-body missions currently in flight — Hera, Lucy, and Psyche.
3 missionsEvery small-body mission with a known launch date, in chronological order.
14 missionsThe small-body missions of NASA and its centers (JPL, APL).
12 missionsThe European Space Agency's small-body missions — Giotto, Rosetta, Hera, and Comet Interceptor.
6 missionsJAXA's small-body missions — the Hayabusa sample-return line, MMX, and DESTINY+.
5 missionsThe ways a spacecraft can explore a small body — most missions are more than one.
The missions that brought pieces of other worlds home — and the samples they returned.
NASA's comet sample-return mission — it flew through the coma of comet Wild 2, captured dust in aerogel, and parachuted the sample capsule to Earth in 2006: the first sample return from a comet, and the first return of solid material from beyond the Moon (NASA's Genesis had returned solar-wind atoms in 2004). Its extended mission (Stardust-NExT) later imaged the Deep Impact crater on Tempel 1.
JAXA's pathfinding asteroid sample-return mission — the first spacecraft to land on an asteroid and return material to Earth. Despite a cascade of failures (reaction wheels, a fuel leak, an intermittent ion engine, and a lost lander), it recovered more than a thousand microscopic grains of the asteroid Itokawa.
JAXA's follow-up to Hayabusa — a far more capable mission to the carbonaceous asteroid Ryugu. It deployed rovers and a lander, fired a projectile to make an artificial crater and sample subsurface material, and returned 5.4 grams of pristine, water- and organic-bearing rock. The spacecraft is now on an extended mission to a small fast-rotating asteroid.
NASA's first asteroid sample-return mission — it orbited the carbonaceous near-Earth asteroid Bennu, mapped it in detail, and used a touch-and-go manoeuvre to grab a large sample, returning 121.6 grams to Earth in 2023. The spacecraft continued on as OSIRIS-APEX to study the asteroid Apophis.
JAXA's planned mission to the moons of Mars — it will study Phobos and Deimos and return a sample of Phobos to Earth, testing whether the Martian moons are captured asteroids or debris from a giant impact.
A NASA New Frontiers proposal to return a sample from comet 67P/Churyumov–Gerasimenko — the comet Rosetta explored. It was a finalist in the New Frontiers 4 competition but was not selected (Dragonfly was chosen instead).
A NASA Discovery mission on a twelve-year tour of the Jupiter Trojans — ancient asteroids trapped at Jupiter's Lagrange points that are fossils of planet formation. It is the first mission to these bodies, with main-belt asteroid flybys along the way.
A NASA Discovery mission to the metal-rich asteroid 16 Psyche — possibly the exposed core of a shattered protoplanet. Using solar-electric propulsion, it will orbit and map a world made largely of metal, a type never before visited.
ESA's follow-up to DART and the European half of the AIDA collaboration — it is cruising to the Didymos–Dimorphos system to survey the crater DART left and measure Dimorphos's mass, turning the DART experiment into a well-characterised deflection.
| Mission | Agency | Type | Status | Launched |
|---|---|---|---|---|
| Giotto | ESA | Flyby | Completed | 1985-07-02 |
| NEAR Shoemaker | NASA / JHU APL | Flyby · rendezvous · orbiter · landing | Completed | 1996-02-17 |
| Deep Space 1 | NASA / JPL | Flyby (technology demonstration) | Completed | 1998-10-24 |
| Stardust | NASA / JPL | Flyby · sample return | Completed | 1999-02-07 |
| Hayabusa | JAXA (ISAS) | Rendezvous · touchdown · sample return | Completed | 2003-05-09 |
| Rosetta | ESA | Rendezvous · orbiter · lander | Completed | 2004-03-02 |
| Deep Impact | NASA / JPL / University of Maryland | Flyby · impactor | Completed | 2005-01-12 |
| Dawn | NASA / JPL | Rendezvous · orbiter (two bodies) | Completed | 2007-09-27 |
| Hayabusa2 | JAXA | Rendezvous · lander · impactor · sample return | Extended mission | 2014-12-03 |
| OSIRIS-REx | NASA / University of Arizona / Lockheed Martin | Rendezvous · touch-and-go · sample return | Extended mission | 2016-09-08 |
| Lucy | NASA / SwRI | Flyby (multiple targets) | Active | 2021-10-16 |
| DART | NASA / JHU APL | Impactor (planetary defense) | Completed | 2021-11-24 |
| Psyche | NASA / JPL / ASU | Rendezvous · orbiter | Active | 2023-10-13 |
| Hera | ESA | Rendezvous · orbiter (planetary defense) | Active | 2024-10-07 |
Small-body missions pioneered technologies now used across deep space: ion (solar-electric) propulsion (Deep Space 1, Dawn, Hayabusa), autonomous optical navigation for close operations at low gravity, aerogel dust capture (Stardust), touch-and-go sampling (OSIRIS-REx), and kinetic-impactor guidance (DART). Every figure here is source-backed; nothing is fabricated.
Each mission, mission class, returned sample, capsule, phase, and campaign is a first-class knowledge-graph entity resolved through the Scientific Data Engine. Missions reuse the platform's existing spacecraft, rockets (Program V), asteroids (Program Y), comets (Program Z), and agencies — existing missions are enriched, never duplicated. Timelines, targets, launch vehicles, and sample masses come from NASA/JPL, ESA, and JAXA; planned missions assert no results they have not achieved. Unknown values are left blank. See source quality.