(2019 YF4)
Far beyond Earth–Moon orbit
≈ 61.7 million km · 161× the Moon's distance
No impact trajectory detected.
3 days ago
Key metrics
- Distance
- 160.6 LD
- ≈ 61.7 million km
- Velocity
- 6.3 km/s
- 22860 km/h
- Estimated size
- 11 – 24 m
- 🏢 ≈ a 10-story building
- Approach time
- Sun, Sep 13 · 00:00 UTC
- 3 days ago
- Absolute magnitude (H)
- 27
- Lower = brighter
- Status
- Passed
- Tracked by NASA NeoWs
3D Orbital path
Size comparison
(2019 YF4) is about 156% of School bus.
Hypothetical impact energy
Would likely explode in the atmosphere as a fireball (airburst). Minor ground damage possible.
What this means
This object passed at 161 LD — safely distant and of interest mainly to orbital surveys. No impact trajectory has been detected.
Approach timeline
Upcoming
- Thu, Feb 26 · 03:26 UTC48.82 LD18.8 million km6.8 km/s
- Fri, Dec 7 · 03:02 UTC71.82 LD27.6 million km8.6 km/s
- Fri, Feb 1 · 00:15 UTC5.03 LD1.9 million km3 km/s
- Fri, Jan 18 · 21:40 UTC3.34 LD1.3 million km2.8 km/s
Past
- Sun, Sep 13 · 00:00 UTC160.61 LD61.7 million km6.3 km/s
- Fri, Jan 10 · 09:25 UTC3.71 LD1.4 million km2.9 km/s
- Tue, Dec 8 · 07:08 UTC55.57 LD21.4 million km7.4 km/s
- Mon, Feb 7 · 11:53 UTC11.88 LD4.6 million km3.6 km/s
- Fri, Dec 2 · 21:28 UTC76.06 LD29.2 million km9 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.
Passes at a comfortable distance — routine flyby.
Close-but-comfortable. Interesting enough to highlight.
Inside 10 lunar distances — actively tracked.
Large object passing unusually close — refined each observation.