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SkyTracko
Safe flyby

(2018 GY3)

No riskNASA SPK-ID 3802577
Miss distance
141.5 LD

Far beyond Earth–Moon orbit

≈ 54.4 million km · 141× the Moon's distance

No impact trajectory detected.

Closest approach
Sun, May 17 · 00:00 UTC

28 days ago

Key metrics

Distance
141.5 LD
≈ 54.4 million km
Velocity
8.3 km/s
30053 km/h
Estimated size
8 – 18 m
🏢 ≈ a 10-story building
Approach time
Sun, May 17 · 00:00 UTC
28 days ago
Absolute magnitude (H)
27.6
Lower = brighter
Status
Passed
Tracked by NASA NeoWs

3D Orbital path

Size comparison

(2018 GY3) is about 118% of School bus.

13 m
(2018 GY3)
13 m
School bus
11 m
Compare against

Hypothetical impact energy

0.0 MtTNT equivalent

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

Hiroshima equivalents
2
Estimated mass
3.0M kg
Diameter used
13 m
Impact velocity
8.3 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 141 LD — safely distant and of interest mainly to orbital surveys. No impact trajectory has been detected.

Approach timeline

17 events

Upcoming

  • Sat, Apr 7 · 00:08 UTC
    29.66 LD
    11.4 million km
    8.9 km/s
  • Thu, Sep 12 · 15:55 UTC
    69.98 LD
    26.9 million km
    16.4 km/s
  • Sat, Sep 24 · 19:13 UTC
    29.59 LD
    11.4 million km
    8.9 km/s
  • Sun, Apr 10 · 20:26 UTC
    6.34 LD
    2.4 million km
    11.6 km/s
  • Sat, Sep 24 · 15:51 UTC
    20.54 LD
    7.9 million km
    9.6 km/s
  • Wed, Apr 10 · 09:34 UTC
    1.34 LD
    514,509 km
    11.3 km/s
  • Wed, Sep 23 · 14:07 UTC
    8.13 LD
    3.1 million km
    11.7 km/s

Past

  • Sun, May 17 · 00:00 UTC
    141.48 LD
    54.4 million km
    8.3 km/s
  • Tue, Sep 17 · 22:14 UTC
    23.55 LD
    9.1 million km
    12.9 km/s
  • Tue, Apr 10 · 04:23 UTC
    0.78 LD
    301,081 km
    11.3 km/s
  • Fri, Sep 11 · 02:24 UTC
    58.44 LD
    22.5 million km
    15.6 km/s
  • Wed, Apr 9 · 19:47 UTC
    1.57 LD
    604,886 km
    11.3 km/s
  • Sat, Sep 17 · 08:43 UTC
    23.59 LD
    9.1 million km
    9.4 km/s
  • Sun, Apr 7 · 17:17 UTC
    21.73 LD
    8.4 million km
    9.4 km/s
  • Wed, Sep 15 · 16:53 UTC
    7.63 LD
    2.9 million km
    10.7 km/s
  • Sun, Apr 8 · 13:52 UTC
    20.54 LD
    7.9 million km
    9.6 km/s
  • Tue, Sep 14 · 20:25 UTC
    5.18 LD
    2 million km
    11.1 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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