4769 Castalia (1989 PB)
Tracked by NASA JPL Near-Earth Object Web Service (NeoWs), 4769 Castalia (1989 PB) is a S-type (Bilobed Contact Binary) body measuring between 1100m and 1400m in diameter. On 2026-10-28, it completes a cislunar approach at 9.40 Lunar Distances (3,613,360 km) with a relative heliocentric velocity of 17.40 km/s.
Exact Landmark Scale Comparison (1400m)
Kinetic Impact Physics & Orbital Parameters
4769 Castalia (1989 PB) (H = 16.9, Vmag ≈ 10.1) 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 1100m 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.
Will 4769 Castalia (1989 PB) impact Earth during its 2026-10-28 approach?
No. NASA JPL Center for Near-Earth Object Studies (CNEOS) orbital solutions confirm 4769 Castalia (1989 PB) will pass safely at a minimum distance of 9.40 Lunar Distances (3,613,360 km). You can still simulate a hypothetical street-level impact in our 3D CesiumJS simulator.
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Ultra-portable Sony IMX678 starlight tele-camera with AI equatorial tracking and automated asteroid field stacking.
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.