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SkyTracko
Safe flyby

(2020 BK13)

No riskNASA SPK-ID 3989296
Miss distance
175.4 LD

Far beyond Earth–Moon orbit

67.4 million km · 175× the Moon's distance

No impact trajectory detected.

Closest approach
Sat, Aug 1 · 00:00 UTC

46 days ago

Key metrics

Distance
175.4 LD
≈ 67.4 million km
Velocity
23 km/s
82867 km/h
Estimated size
5 – 12 m
🚌 ≈ a school bus
Approach time
Sat, Aug 1 · 00:00 UTC
46 days ago
Absolute magnitude (H)
28.5
Lower = brighter
Status
Passed
Tracked by NASA NeoWs

3D Orbital path

Size comparison

(2020 BK13) is about 78% of School bus.

9 m
(2020 BK13)
9 m
School bus
11 m
Compare against

Hypothetical impact energy

0.1 MtTNT equivalent

Would likely explode in the atmosphere as a fireball (airburst). Minor ground damage possible.

Hiroshima equivalents
4
Estimated mass
860,201 kg
Diameter used
9 m
Impact velocity
23.0 km/s
Assumes stony composition (2,600 kg/m³). Actual energy depends on composition, angle, and atmospheric interaction. This is NOT a prediction — this asteroid is not on a collision course.

What this means

This object passed at 175 LD — safely distant and of interest mainly to orbital surveys. No impact trajectory has been detected.

Approach timeline

8 events

Upcoming

  • Sat, Aug 26 · 19:14 UTC
    13.79 LD
    5.3 million km
    9.3 km/s
  • Mon, Aug 23 · 10:40 UTC
    14.8 LD
    5.7 million km
    10.6 km/s
  • Thu, Feb 3 · 12:24 UTC
    34.49 LD
    13.3 million km
    12.5 km/s
  • Tue, Sep 28 · 02:31 UTC
    61.53 LD
    23.7 million km
    7 km/s
  • Wed, Jan 28 · 07:02 UTC
    1.05 LD
    404,464 km
    9.9 km/s

Past

  • Sat, Aug 1 · 00:00 UTC
    175.38 LD
    67.4 million km
    23 km/s
  • Tue, Jan 28 · 02:42 UTC
    1.51 LD
    579,416 km
    9.9 km/s
  • Wed, Aug 29 · 19:24 UTC
    14.45 LD
    5.6 million km
    9.4 km/s

How we classify risk

Each object's risk class is computed locally from two NASA NeoWs signals: miss distance (in lunar distances) and estimated diameter. "Potentially hazardous" is NASA's own flag — applied when an object's orbit brings it within 0.05 AU of Earth and it's at least ~140 m across. That flag indicates monitoring interest, not an impact prediction.

No risk

Passes at a comfortable distance — routine flyby.

Watch

Close-but-comfortable. Interesting enough to highlight.

Notable

Inside 10 lunar distances — actively tracked.

Significant

Large object passing unusually close — refined each observation.

Other tracked objects

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