SkyTracko
Safe flyby

(2018 SE2)

No riskNASA SPK-ID 3830881
Miss distance
140.8 LD

Far beyond Earth–Moon orbit

≈ 54.1 million km · 141× the Moon's distance

No impact trajectory detected.

Closest approach
Mon, Apr 13 · 00:00 UTC

16 days ago

Key metrics

Distance
140.8 LD
≈ 54.1 million km
Velocity
10.1 km/s
36525 km/h
Estimated size
31 – 68 m
🏟️ ≈ a football field
Approach time
Mon, Apr 13 · 00:00 UTC
16 days ago
Absolute magnitude (H)
24.7
Lower = brighter
Status
Passed
Tracked by NASA NeoWs

3D Orbital path

Size comparison

(2018 SE2) is about 150% of 10-story building.

49 m
(2018 SE2)
49 m
10-story building
33 m
Compare against

Hypothetical impact energy

2.0 MtTNT equivalent

Would cause significant local destruction. Comparable to a large nuclear weapon.

Hiroshima equivalents
134
Estimated mass
163.9M kg
Diameter used
49 m
Impact velocity
10.1 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

18 events

Upcoming

  • Tue, Sep 21 · 11:48 UTC
    73.48 LD
    28.2 million km
    14.9 km/s
  • Thu, Mar 18 · 17:30 UTC
    55.96 LD
    21.5 million km
    12.9 km/s
  • Sat, Mar 18 · 16:56 UTC
    38.62 LD
    14.8 million km
    11.4 km/s
  • Wed, Mar 20 · 16:10 UTC
    51.65 LD
    19.9 million km
    10.6 km/s
  • Sat, Oct 5 · 06:40 UTC
    59.11 LD
    22.7 million km
    10.4 km/s
  • Thu, Oct 1 · 23:55 UTC
    22.71 LD
    8.7 million km
    10.9 km/s
  • Thu, Sep 29 · 07:41 UTC
    6.32 LD
    2.4 million km
    11.7 km/s
  • Sun, Sep 23 · 02:31 UTC
    60.81 LD
    23.4 million km
    14.2 km/s

Past

  • Mon, Apr 13 · 00:00 UTC
    140.84 LD
    54.1 million km
    10.1 km/s
  • Fri, Sep 26 · 13:09 UTC
    29.3 LD
    11.3 million km
    12.7 km/s
  • Sun, Sep 30 · 01:18 UTC
    5.88 LD
    2.3 million km
    11.5 km/s
  • Wed, Oct 5 · 06:15 UTC
    59.07 LD
    22.7 million km
    10.4 km/s
  • Sat, Mar 19 · 05:04 UTC
    42.09 LD
    16.2 million km
    10.9 km/s
  • Wed, Mar 18 · 08:32 UTC
    54.59 LD
    21 million km
    12.8 km/s
  • Sat, Sep 27 · 02:22 UTC
    27.72 LD
    10.7 million km
    12.6 km/s
  • Tue, Oct 1 · 06:40 UTC
    22.18 LD
    8.5 million km
    10.9 km/s
  • Thu, Mar 22 · 06:27 UTC
    61.59 LD
    23.7 million km
    10.4 km/s
  • Fri, Mar 18 · 14:58 UTC
    39.65 LD
    15.2 million km
    11.6 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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