Mission Control/ASTEROID DOSSIER: 65803
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POTENTIALLY HAZARDOUS ASTEROID (PHA)NASA CATALOG + DOCUMENTED ANALYSIS

65803 Didymos (1996 GT)

Tracked by NASA JPL Near-Earth Object Web Service (NeoWs), 65803 Didymos (1996 GT) is a S body measuring between 780m and 780m in diameter. On 2062-10-20, it completes a cislunar approach at 19.32 Lunar Distances (7,427,558 km) with a relative heliocentric velocity of 5.14 km/s.

AI-ASSISTED SUMMARY (may contain errors):

65803 Didymos (1996 GT) (JPL ID 65803) is a S Near-Earth Asteroid spanning 780.0m–780.0m (mean 780m). On 2062-10-20, it transits Earth's cislunar surveillance sector at 19.322 Lunar Distances (7,427,558 km) with a relative velocity of 5.14 km/s and a theoretical kinetic energy reserve of 2235.79 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.

Max Diameter (Ø)
780 m
Min: 780 m
Miss Distance
19.32 LD
7,427,558 km
Rel. Velocity
5.14 km/s
18,504 km/h
Kinetic Energy
2,353.468 MT
E = ½mv² TNT eq.

Exact Landmark Scale Comparison (780m)

1:1 Meter Scale
780m
65803
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)18.11 mag
Spectral ClassificationS
Estimated Bolide Mass7.454e+11 kg
Kinetic Energy (E = ½mv²)2,353.468 MT TNT (9.85e+18 J)
Transient Crater Diameter / Depth6,310 m Ø / 1,325 m deep
5-PSI Structural Overpressure Radius25.28 km
Thermal 3rd-Degree Burn Radius67.54 km
Equivalent Seismic MagnitudeMw 6.9
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 +12.88
Abs. Magnitude H = 18.11
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: 65803 Didymos (1996 GT)

65803 Didymos (1996 GT) (H = 18.1, Vmag ≈ 12.9) is below consumer optical detection thresholds (requires ≥1000mm survey aperture); explore certified meteorite specimens[↗] or indoor optical projection instead.

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3D Ephemeris Trajectory Waypoints

Node T+0Lat -15.41° · Lon -46.15°136,800 km
Node T+1Lat -14.50° · Lon -36.57°122,617 km
Node T+2Lat -13.51° · Lon -26.98°109,667 km
Node T+3Lat -12.46° · Lon -17.40°97,950 km
Node T+4Lat -11.33° · Lon -7.82°87,467 km
Node T+5Lat -10.13° · Lon 1.77°78,217 km

Planetary Defense Frequently Asked Questions (Schema.org FAQ)

How big is 65803 Didymos (1996 GT) compared to city landmarks?

65803 Didymos (1996 GT) has an estimated diameter between 780m and 780m. At its upper-bound size of 780m, it stands 176% as tall as the 443m Empire State Building in New York City and 236% of the 330m Eiffel Tower.

What does the stored 2062-10-20 close-approach estimate show?

This catalog snapshot lists a nominal miss distance of 19.32 Lunar Distances (7,427,558 km) for 65803 Didymos (1996 GT). 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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65803 Didymos (1996 GT) — 3D Orbit, Size Comparison & Kinetic Impact Physics | Meteors.ai Space Network