4769 Castalia (1989 PB)
Tracked by NASA JPL Near-Earth Object Web Service (NeoWs), 4769 Castalia (1989 PB) is a Not published by JPL SBDB body measuring between 1400m and 1400m in diameter. On 2027-04-04, it completes a cislunar approach at 50.14 Lunar Distances (19,272,096 km) with a relative heliocentric velocity of 13.76 km/s.
4769 Castalia (1989 PB) (JPL ID 4769) is a Not published by JPL SBDB Near-Earth Asteroid spanning 1400.0m–1400.0m (mean 1400m). On 2027-04-04, it transits Earth's cislunar surveillance sector at 50.136 Lunar Distances (19,272,096 km) with a relative velocity of 13.76 km/s and a theoretical kinetic energy reserve of 92649.44 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 (1400m)
Kinetic Impact Physics & Orbital Parameters
4769 Castalia (1989 PB) (H = 17.4, Vmag ≈ 14.3) 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 4769 Castalia (1989 PB) compared to city landmarks?
4769 Castalia (1989 PB) has an estimated diameter between 1400m and 1400m. At its upper-bound size of 1400m, it stands 316% as tall as the 443m Empire State Building in New York City and 424% of the 330m Eiffel Tower.
What does the stored 2027-04-04 close-approach estimate show?
This catalog snapshot lists a nominal miss distance of 50.14 Lunar Distances (19,272,096 km) for 4769 Castalia (1989 PB). 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.
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