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official data

PHA 2026 OH3 inbound — ~12.3 LD Sept 11 flyby, not an impact

Origin Lane: neoNASA JPL CNEOS, Pasadena, California

NASA’s Center for Near-Earth Object Studies close-approach table lists potentially hazardous asteroid 2026 OH3 at a nominal Earth distance of 0.0316301888849004 astronomical units on 11 September 2026 at 04:23 TDB (CAD field is TDB, not UTC; t_sigma_f 00:29). Relative velocity is 20.174042935888 km/s; absolute magnitude H = 21.304. JPL SBDB classifies it as a NEO and PHA, Apollo-class, Earth MOID 0.0259 au, 47 observations, 39-day arc, condition_code 8. The Sentry API returns “specified object not found.” This is a close approach, not an impact forecast. There is no official Earth impact location.

Assumed place pin at JPL/CNEOS (Pasadena) — no Earth impact location; close approach ≠ impact.
Nominal dist
0.0316301888849004 au (~12.31 lunar distances using 1 au≈149597870.7 km and 1 LD≈384400 km)
3-sigma floor
dist_min 0.0315984763671578 au
Time
2026-Sep-11 04:23 TDB; t_sigma_f 00:29
v_rel / H
20.174042935888 km/s; H=21.304
SBDB
NEO yes; PHA yes; Apollo; Earth MOID 0.0259 au; 47 obs; 39-day arc; condition_code 8
Sentry
object not found — not on the impact risk list

specified object not found

NASA JPL Sentry Data API for des=2026 OH3

Potentially hazardous asteroid (PHA) is an orbit-class label about proximity and size criteria, not a prediction that this object will hit Earth. Sentry not listing 2026 OH3 means it is not on the current impact-risk table.

CAD distances and times are from the official NASA/JPL SBDB Close Approach Data API. Doom Signals does not invent miss distances or impact corridors.

Why it matters

Next notable post-QQ1/QH3 flyby: official PHA Apollo with H~21.3 on Sep 11 — larger/faster than board QQ1. Cataloged close approach, not an impact forecast.

Sources

Official data. Not a forecast.

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