Asteroid
162173 Ryugu
A near-Earth asteroid sampled by Japan's Hayabusa2.
- Type
- Asteroid
- Domain
- Scientific connections
- Connections
- 9
- Type: Asteroid
- Domain: Scientific connections
Orbit & physical parameters
Osculating orbit and physical parameters from the NASA JPL Small-Body Database · Apollo · near-Earth · potentially hazardous · epoch 2026-06-09 (JD 2461200.5 TDB) · Earth MOID 0.000538502 au
| Semi-major axis | 1.190919 ± 2.7841e-9 au | NASA JPL · calculated |
| Eccentricity | 0.191073 ± 8.4816e-9 | NASA JPL · calculated |
| Perihelion distance | 0.963366 ± 1.0947e-8 au | NASA JPL · calculated |
| Aphelion distance | 1.418471 ± 3.3161e-9 au | NASA JPL · calculated |
| Inclination | 5.866442 ± 4.2447e-7 deg | NASA JPL · calculated |
| Longitude of ascending node | 251.289712 ± 2.6284e-6 deg | NASA JPL · calculated |
| Argument of perihelion | 211.608994 ± 3.1058e-6 deg | NASA JPL · calculated |
| Orbital period | 474.702726 ± 1.6646e-6 d | NASA JPL · calculated |
| Diameter | 0.896 ± 0.004 km | NASA JPL · catalogued |
| Geometric albedo | 0.045 ± 0.002 | NASA JPL · estimated |
| Rotation period | 7.63262 ± 2.0000e-5 h | NASA JPL · catalogued |
| Absolute magnitude (H) | 19.55 mag | NASA JPL · catalogued |
Full field-level provenance
- Semi-major axis: Jet Propulsion Laboratory / Solar System Dynamics · JPL SBDB · orbit.elements · a · JPL orbit determination (least-squares fit to the observation arc) · calculated · JPL solution by Otto Matic, 5088 obs · retrieved 2026-07-11
- Eccentricity: Jet Propulsion Laboratory / Solar System Dynamics · JPL SBDB · orbit.elements · e · JPL orbit determination (least-squares fit to the observation arc) · calculated · JPL solution by Otto Matic, 5088 obs · retrieved 2026-07-11
- Perihelion distance: Jet Propulsion Laboratory / Solar System Dynamics · JPL SBDB · orbit.elements · q · JPL orbit determination (least-squares fit to the observation arc) · calculated · JPL solution by Otto Matic, 5088 obs · retrieved 2026-07-11
- Aphelion distance: Jet Propulsion Laboratory / Solar System Dynamics · JPL SBDB · orbit.elements · ad · JPL orbit determination (least-squares fit to the observation arc) · calculated · JPL solution by Otto Matic, 5088 obs · retrieved 2026-07-11
- Inclination: Jet Propulsion Laboratory / Solar System Dynamics · JPL SBDB · orbit.elements · i · JPL orbit determination (least-squares fit to the observation arc) · calculated · JPL solution by Otto Matic, 5088 obs · retrieved 2026-07-11
- Longitude of ascending node: Jet Propulsion Laboratory / Solar System Dynamics · JPL SBDB · orbit.elements · om · JPL orbit determination (least-squares fit to the observation arc) · calculated · JPL solution by Otto Matic, 5088 obs · retrieved 2026-07-11
- Argument of perihelion: Jet Propulsion Laboratory / Solar System Dynamics · JPL SBDB · orbit.elements · w · JPL orbit determination (least-squares fit to the observation arc) · calculated · JPL solution by Otto Matic, 5088 obs · retrieved 2026-07-11
- Orbital period: Jet Propulsion Laboratory / Solar System Dynamics · JPL SBDB · orbit.elements · per · JPL orbit determination (least-squares fit to the observation arc) · calculated · JPL solution by Otto Matic, 5088 obs · retrieved 2026-07-11
- Diameter: Jet Propulsion Laboratory / Solar System Dynamics · JPL SBDB · phys_par · phys.diameter · catalogued value · JPL solution by Otto Matic, 5088 obs · retrieved 2026-07-11
- Geometric albedo: Jet Propulsion Laboratory / Solar System Dynamics · JPL SBDB · phys_par · phys.albedo · Bayesian estimate · JPL solution by Otto Matic, 5088 obs · retrieved 2026-07-11
- Rotation period: Jet Propulsion Laboratory / Solar System Dynamics · JPL SBDB · phys_par · phys.rot_per · catalogued value · JPL solution by Otto Matic, 5088 obs · retrieved 2026-07-11
- Absolute magnitude (H): Jet Propulsion Laboratory / Solar System Dynamics · JPL SBDB · phys_par · phys.H · catalogued value · JPL solution by Otto Matic, 5088 obs · retrieved 2026-07-11
Orbital elements are a calculated JPL orbit-determination fit, all referred to the single osculating epoch above (solution by Otto Matic); each carries its own uncertainty. Fields the database did not provide are omitted, never invented.
Experience system V6
Small-body profile
A catalog-first story for orbit class, discovery, physical parameters, and planetary-defense context when recorded.
- 01
Observe
The page falls back to graph and source evidence when no cleared image is available.
- 02
Measure
Measurement panels use graph coverage, catalog identifiers, and source availability without inventing values.
- 03
Locate
Part of Solar System.
- 04
Connect
9 graph relations shape the knowledge viewport.
- Object type
- Asteroid
- Graph relations
- 9
- Verified sources
- 1
- Image records
- 0
- Domain
- Scientific connections
- Status
- Graph entity
Scientific map
Orbit context
- Primary orbital anchor
- The Sun
- Measured orbit field
- Orbital distance not recorded in this graph record
Original SVG diagram
Small-body anatomy
- Designation
- (162173) Ryugu
- Discovery
- 1999
- Eccentricity
- Not recorded
- Inclination
- Not recorded
Visual knowledge graph
Relationships, not isolated facts
This viewport is generated from the Asteria knowledge graph. Science, culture, and interpretive links remain separated by domain so visual context never changes the evidentiary meaning of a relation.
- Member of groupApollo asteroids
- Target ofHayabusa2
- Visited byHayabusa2
- Samples returned byHayabusa2
- Landing site ofHayabusa2
- Impacted byHayabusa2
- Associated withOSIRIS-REx and Hayabusa2 Sample Asteroids
- Associated withRyugu Sample (Hayabusa2)
Continue the atlas
Curated next objects
Solar System
The Sun and the bodies gravitationally bound to it.
space missionHayabusa2
Hayabusa2 collected surface and subsurface samples of the asteroid Ryugu and returned them to Earth.
near earth objectApollo asteroids
The largest class of near-Earth asteroids — Earth-crossers with orbits mostly larger than Earth's, named after 1862 Apollo.
returned sampleRyugu Sample (Hayabusa2)
5.4 grams of surface and subsurface material from the carbonaceous asteroid 162173 Ryugu, returned by Hayabusa2 in 2020. The pristine, water- and organic-bearing grains contain amino acids and predate the Solar System's planets.
timeline eventOSIRIS-REx and Hayabusa2 Sample Asteroids
Within months of each other, Japan's Hayabusa2 delivers samples of asteroid Ryugu to Earth and NASA's OSIRIS-REx collects a sample from asteroid Bennu, opening a new age of asteroid sample return.
launch vehicleH-IIA
A Japanese launch vehicle that flew JAXA science missions including Hayabusa2 and the Akatsuki Venus orbiter.
Data
Scientific data & provenance
Data & provenance
- Stable ID
asteroid:ryugu- Type
- Asteroid
- Domain
- Scientific connections
- Relationships
- 9
- Graph version
- 1.0.0
Dataset membership
Open data
In the graph export: graph.json · graph.jsonld
Planned API: GET /api/v0/entities/asteroid:ryugu
Scientific quality
Partial2 of 6 applicable dimensions complete, 1 partial
- Description
- Complete
- Source coverage
- Partial
- Relationship coverage
- Complete
- Review coverage
- None
- Citation coverage
- None
- Image coverage
- None
- Timeline coverage
- Not applicable
Scientific entity. Dimensions that cannot apply to this object are excluded rather than counted as gaps. See the evidence framework and authority dashboard.
You might also explore
- Launch vehicleH-IIALinked through Hayabusa2
- Mission programHayabusa programLinked through Hayabusa2
- Sample-return capsuleHayabusa2 Sample-Return CapsuleLinked through Hayabusa2
- Mission classImpactor MissionLinked through Hayabusa2
- OrganizationJAXA (Japan Aerospace Exploration Agency)Linked through Hayabusa2
- Tracking networkJAXA Deep Space NetworkLinked through Hayabusa2
Sources & references
The primary and reference sources this topic draws on.
- NASA JPLJet Propulsion Laboratory / Solar System Dynamics
Orbital data, ephemerides, and small-body parameters for planets, asteroids, and comets.