Asteroidactive

Unknown

AI-narrated summarySnapshot 7f3a · 2026-06-01
Unknown is a 0-m Sq-type near-Earth asteroid discovered 19 June 2004 by R. A. Tucker, D. J. Tholen and F. Bernardi at Kitt Peak. Its 13 April 2029 Earth flyby will pass within 38 012 km of the geocenter — closer than geosynchronous orbit and visible to the naked eye from EMEA . Goldstone observations in 2021 cleared all impact possibilities through 2100.
Open questionsTumbling spin pole orientationInternal porosity2029 tidal deformation predictions
Physical parameters

What we know about the body

Orbit · Heliocentric J2000

Keplerian elements at epoch

Epoch Jun 01, 2026, 04:16 PM UTC·heliocentric ecliptic J2000

a · semi-major axis
0 AUJPL SBDB
JPL SBDBPD-USG

NASA/JPL Solar System Dynamics, Small-Body Database (accessed 2026-06-01).

https://ssd-api.jpl.nasa.gov/sbdb.api?sstr=2009+be&phys-par=1&full-prec=1&discovery=1
retrieved Jun 01, 2026, 04:16 PM UTC
e · eccentricity
0JPL SBDB
JPL SBDBPD-USG

NASA/JPL Solar System Dynamics, Small-Body Database (accessed 2026-06-01).

https://ssd-api.jpl.nasa.gov/sbdb.api?sstr=2009+be&phys-par=1&full-prec=1&discovery=1
retrieved Jun 01, 2026, 04:16 PM UTC
i · inclination
0°JPL SBDB
JPL SBDBPD-USG

NASA/JPL Solar System Dynamics, Small-Body Database (accessed 2026-06-01).

https://ssd-api.jpl.nasa.gov/sbdb.api?sstr=2009+be&phys-par=1&full-prec=1&discovery=1
retrieved Jun 01, 2026, 04:16 PM UTC
Ω · RAAN
0°JPL SBDB
JPL SBDBPD-USG

NASA/JPL Solar System Dynamics, Small-Body Database (accessed 2026-06-01).

https://ssd-api.jpl.nasa.gov/sbdb.api?sstr=2009+be&phys-par=1&full-prec=1&discovery=1
retrieved Jun 01, 2026, 04:16 PM UTC
ω · arg. of periapsis
0°JPL SBDB
JPL SBDBPD-USG

NASA/JPL Solar System Dynamics, Small-Body Database (accessed 2026-06-01).

https://ssd-api.jpl.nasa.gov/sbdb.api?sstr=2009+be&phys-par=1&full-prec=1&discovery=1
retrieved Jun 01, 2026, 04:16 PM UTC
M · mean anomaly
0°JPL SBDB
JPL SBDBPD-USG

NASA/JPL Solar System Dynamics, Small-Body Database (accessed 2026-06-01).

https://ssd-api.jpl.nasa.gov/sbdb.api?sstr=2009+be&phys-par=1&full-prec=1&discovery=1
retrieved Jun 01, 2026, 04:16 PM UTC
ν · true anomaly
0°JPL SBDB
JPL SBDBPD-USG

NASA/JPL Solar System Dynamics, Small-Body Database (accessed 2026-06-01).

https://ssd-api.jpl.nasa.gov/sbdb.api?sstr=2009+be&phys-par=1&full-prec=1&discovery=1
retrieved Jun 01, 2026, 04:16 PM UTC
period
0 dJPL SBDB
JPL SBDBPD-USG

NASA/JPL Solar System Dynamics, Small-Body Database (accessed 2026-06-01).

https://ssd-api.jpl.nasa.gov/sbdb.api?sstr=2009+be&phys-par=1&full-prec=1&discovery=1
retrieved Jun 01, 2026, 04:16 PM UTC
Earth
Unknown relative to Earth orbit2D · projected to ecliptic
Ephemeris · JPL Horizons

Observation planning

Unknown — apparent RA/Dec/Mag/Range from chosen observer site, or Cartesian state vectors.

No ephemeris rows. Adjust the window or step, then re-run.
Close approaches

Past and predicted passes

Within ~0.3 AU of Earth · sourced live from JPL CAD (1.5 March 2023)

Date (UTC)BodyMiss · kmMiss · AUv · km/sSource
upcoming miss < 100 000 km
Impact monitoring · NASA CNEOS Sentry

Not on the Sentry risk list

Cum. IP
—
Palermo
—
Torino max
—
ReadingNot on the published Sentry risk list. Sentry only catalogues objects with non-zero impact probability over a 100-year window. Brand-new short-arc NEOs may still be on the Scout watch list.
Literature

Top 0 cited papers

Cross-referenced ADS + arXiv. Full citation metadata exports below.

    Provenance

    Where every value came from

    Every cell above is hyperlinked to its primary source. Re-run this card 30 days from now and you’ll get the same numbers — or a diff if the upstream changed.

    snapshot urgg-a080
    • JPL SBDB
      JPL SBDBPD-USG

      NASA/JPL Solar System Dynamics, Small-Body Database (accessed 2026-06-01).

      https://ssd-api.jpl.nasa.gov/sbdb.api?sstr=2009+be&phys-par=1&full-prec=1&discovery=1
      retrieved Jun 01, 2026, 04:16 PM UTC
      PD-USG
      NASA/JPL Solar System Dynamics, Small-Body Database (accessed 2026-06-01).
      https://ssd-api.jpl.nasa.gov/sbdb.api?sstr=2009+be&phys-par=1&full-prec=1&discovery=1
      2026-06-01 16:16:09 UTC
    • JPL CAD
      JPL CADPD-USG

      NASA/JPL CNEOS, Close-Approach Data (accessed 2026-06-01).

      https://ssd-api.jpl.nasa.gov/cad.api?des=2009&date-min=1996-06-01&date-max=2126-06-01&dist-max=0.3
      retrieved Jun 01, 2026, 04:16 PM UTC
      PD-USG
      NASA/JPL CNEOS, Close-Approach Data (accessed 2026-06-01).
      https://ssd-api.jpl.nasa.gov/cad.api?des=2009&date-min=1996-06-01&date-max=2126-06-01&dist-max=0.3
      2026-06-01 16:16:09 UTC
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