162173 Ryugu (1999 JU3)
Tracked by NASA JPL Near-Earth Object Web Service (NeoWs), 162173 Ryugu (1999 JU3) is a Cb body measuring between 896m and 896m in diameter. On 2033-12-21, it completes a cislunar approach at 18.46 Lunar Distances (7,097,562 km) with a relative heliocentric velocity of 4.08 km/s.
162173 Ryugu (1999 JU3) (JPL ID 162173) is a Cb Near-Earth Asteroid spanning 896.0m–896.0m (mean 896m). On 2033-12-21, it transits Earth's cislunar surveillance sector at 18.464 Lunar Distances (7,097,562 km) with a relative velocity of 4.08 km/s and a theoretical kinetic energy reserve of 2135.34 megatons TNT. Classified as a Potentially Hazardous Asteroid (PHA) due to its Minimum Orbit Intersection Distance (MOID <= 0.05 AU) and absolute magnitude (H <= 22.0), it remains under high-priority radar and optical astrometric tracking.
Exact Landmark Scale Comparison (896m)
Kinetic Impact Physics & Orbital Parameters
162173 Ryugu (1999 JU3) (H = 19.6, Vmag ≈ 14.2) is below consumer optical detection thresholds (requires ≥1000mm survey aperture); explore certified meteorite specimens[↗] or indoor optical projection instead.
Campo del Cielo Meteorite Specimen (Certified Iron-Nickel)
Authentic coarse octahedrite Group IAB iron-nickel meteorite fragment (92.9% Fe, 6.7% Ni) recovered from the Chaco crater field with certificate of authenticity.
Satin-black 5W warm-white LED optical glass lens planetarium projecting 60,000 stars and simulated meteor shower trajectories indoors.
3D Ephemeris Trajectory Waypoints
Planetary Defense Frequently Asked Questions (Schema.org FAQ)
How big is 162173 Ryugu (1999 JU3) compared to city landmarks?
162173 Ryugu (1999 JU3) has an estimated diameter between 896m and 896m. At its upper-bound size of 896m, it stands 202% as tall as the 443m Empire State Building in New York City and 272% of the 330m Eiffel Tower.
What does the stored 2033-12-21 close-approach estimate show?
This catalog snapshot lists a nominal miss distance of 18.46 Lunar Distances (7,097,562 km) for 162173 Ryugu (1999 JU3). This is not an impact prediction; check the latest NASA JPL record for updated orbital estimates. The 3D impact simulation is hypothetical.
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Authentic coarse octahedrite Group IAB iron-nickel meteorite fragment (92.9% Fe, 6.7% Ni) recovered from the Chaco crater field.
Low-read-noise Sony STARVIS 2 CMOS planetary and all-sky meteor bolide detection camera with 2.0μm pixels.