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SkyTracko
Safe flyby

(2018 CH)

No riskNASA SPK-ID 3798998
Miss distance
194.1 LD

Far beyond Earth–Moon orbit

≈ 74.6 million km · 194× the Moon's distance

No impact trajectory detected.

Closest approach
Wed, Oct 7 · 00:00 UTC

25 days ago

Key metrics

Distance
194.1 LD
≈ 74.6 million km
Velocity
19.4 km/s
69923 km/h
Estimated size
14 – 31 m
🏟️ ≈ a football field
Approach time
Wed, Oct 7 · 00:00 UTC
25 days ago
Absolute magnitude (H)
26.4
Lower = brighter
Status
Passed
Tracked by NASA NeoWs

3D Orbital path

Size comparison

(2018 CH) is about 68% of 10-story building.

23 m
(2018 CH)
23 m
10-story building
33 m
Compare against

Hypothetical impact energy

0.7 MtTNT equivalent

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

Hiroshima equivalents
47
Estimated mass
15.7M kg
Diameter used
23 m
Impact velocity
19.4 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 194 LD — safely distant and of interest mainly to orbital surveys. No impact trajectory has been detected.

Approach timeline

17 events

Upcoming

  • Sat, Apr 17 · 03:59 UTC
    76.47 LD
    29.4 million km
    16.8 km/s
  • Wed, Jan 31 · 10:38 UTC
    6.73 LD
    2.6 million km
    10.2 km/s
  • Fri, Mar 12 · 08:03 UTC
    59.62 LD
    22.9 million km
    8.5 km/s
  • Fri, Apr 19 · 02:46 UTC
    10.21 LD
    3.9 million km
    10.6 km/s
  • Sat, Jan 30 · 21:31 UTC
    40.81 LD
    15.7 million km
    13.9 km/s
  • Thu, Apr 18 · 01:43 UTC
    59.47 LD
    22.9 million km
    15.4 km/s
  • Tue, Apr 19 · 07:25 UTC
    20.61 LD
    7.9 million km
    12.1 km/s
  • Wed, Jan 31 · 05:36 UTC
    5.41 LD
    2.1 million km
    10.9 km/s

Past

  • Wed, Oct 7 · 00:00 UTC
    194.11 LD
    74.6 million km
    19.4 km/s
  • Tue, Apr 16 · 17:12 UTC
    21 LD
    8.1 million km
    9.3 km/s
  • Sun, Mar 7 · 10:26 UTC
    59.54 LD
    22.9 million km
    8.4 km/s
  • Tue, Jan 30 · 23:45 UTC
    4.63 LD
    1.8 million km
    10.4 km/s
  • Fri, Apr 20 · 08:33 UTC
    11.78 LD
    4.5 million km
    10.9 km/s
  • Sat, Jan 31 · 06:41 UTC
    42.81 LD
    16.5 million km
    14.1 km/s
  • Wed, Apr 18 · 16:06 UTC
    12.62 LD
    4.9 million km
    10.1 km/s
  • Tue, Jan 31 · 23:48 UTC
    39.47 LD
    15.2 million km
    13.7 km/s
  • Sat, Jan 31 · 09:33 UTC
    2.94 LD
    1.1 million km
    10.5 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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