Mission Control/ASTEROID DOSSIER: 4660
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POTENTIALLY HAZARDOUS ASTEROID (PHA)GEMMA ENGINE: LOCAL SERVER BOX [ACTIVE] • meteors-gemma:latest

4660 Nereus (1982 DB)

Tracked by NASA JPL Near-Earth Object Web Service (NeoWs), 4660 Nereus (1982 DB) is a Xe-type (Enstatite-Cobalt-Nickel) body measuring between 310m and 350m in diameter. On 2026-10-26, it completes a cislunar approach at 10.22 Lunar Distances (3,928,568 km) with a relative heliocentric velocity of 6.58 km/s.

Max Diameter (Ø)
350 m
Min: 310 m
Miss Distance
10.22 LD
3,928,568 km
Rel. Velocity
6.58 km/s
23,688 km/h
Kinetic Energy
348.461 MT
E = ½mv² TNT eq.

Exact Landmark Scale Comparison (350m)

1:1 Meter Scale
350m
4660
443m
Manhattan
227m
Golden Gate
330m
Eiffel Tower
828m
Burj Khalifa
Inspect side-by-side in interactive Google Earth 3D Tiles:Open 3D Street-Level Simulator

Kinetic Impact Physics & Orbital Parameters

45° Incidence · 3,000 kg/m³
Absolute Magnitude (H)18.6 mag
Spectral ClassificationXe-type (Enstatite-Cobalt-Nickel)
Estimated Bolide Mass6.735e+10 kg
Kinetic Energy (E = ½mv²)348.461 MT TNT (1.46e+18 J)
Transient Crater Diameter / Depth3,765 m Ø / 791 m deep
5-PSI Structural Overpressure Radius13.46 km
Thermal 3rd-Degree Burn Radius30.86 km
Equivalent Seismic MagnitudeMw 6.3
Primary Ephemeris Source:NASA JPL Small-Body Database Lookup
OPTICAL TRACKING REQUIREMENTS // PHOTOMETRIC LINK
TIER C: PLANETARY RADAR / SPECIMEN GRADE
Calculated Apparent Magnitude (Vmag)
Vmag +11.97
Abs. Magnitude H = 18.60
Required Aperture (mm)
≥ 1000 mm (Planetary Radar)
Professional ≥1000mm Survey CCD / Planetary Bistatic Radar Telemetry
Best Viewing Window
JPL Goldstone Radar / Vera C. Rubin LSST Ephemeris Window Only
Target: 4660 Nereus (1982 DB)

4660 Nereus (1982 DB) (H = 18.6, Vmag ≈ 12.0) is below consumer optical detection thresholds (requires ≥1000mm survey aperture); explore certified meteorite specimens[↗] or indoor optical projection instead.

PRIMARY INSTRUMENT // Certified Meteorite SpecimenEst. $68

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.

SKU: campo-del-cielo-specimen · Amazon Tag: meteorsai-20[ACQUIRE OPTICAL HARDWARE ->]
ALTERNATIVE PHOTOMETRIC / SPECIMEN OPTIONS
Homestar Flux Home Planetarium Optical Projector$219

Satin-black 5W warm-white LED optical glass lens planetarium projecting 60,000 stars and simulated meteor shower trajectories indoors.

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3D Ephemeris Trajectory Waypoints

Node T+0Lat -15.00° · Lon -50.00°58,000 km
Node T+1Lat 22.00° · Lon 10.00°44,000 km
Node T+2Lat 41.00° · Lon 75.00°61,000 km

Planetary Defense Frequently Asked Questions (Schema.org FAQ)

How big is 4660 Nereus (1982 DB) compared to city landmarks?

4660 Nereus (1982 DB) has an estimated diameter between 310m and 350m. At its upper-bound size of 350m, it stands 79% as tall as the 443m Empire State Building in New York City and 106% of the 330m Eiffel Tower.

Will 4660 Nereus (1982 DB) impact Earth during its 2026-10-26 approach?

No. NASA JPL Center for Near-Earth Object Studies (CNEOS) orbital solutions confirm 4660 Nereus (1982 DB) will pass safely at a minimum distance of 10.22 Lunar Distances (3,928,568 km). You can still simulate a hypothetical street-level impact in our 3D CesiumJS simulator.

Hall-of-Fame Near-Earth Asteroids & Historic CNEOS Bolides
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4660 Nereus (1982 DB) — 3D Orbit, Size Comparison & Kinetic Impact Physics | Meteors.ai Space Network