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(12538) 1998 OH: A CONTINUING NON-RESOLUTION.

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  • 1Center for Solar System Studies - Palmer Divide Station, 446 Sycamore Ave., Eaton, CO 80615 USA.

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Near-Earth asteroid 1998 OH exhibits unusual behavior, possibly a fast-rotating tumbler or an emerging asteroid pair. Further observations are needed to confirm its true nature.

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Area of Science:

  • Astronomy and astrophysics
  • Solar system studies
  • Near-Earth object research

Background:

  • Asteroid (12538) 1998 OH has ambiguous rotational period solutions from previous observations.
  • Understanding asteroid rotation is crucial for predicting their evolution and potential impact risks.

Purpose of the Study:

  • To obtain secure rotational period data for asteroid 1998 OH.
  • To resolve ambiguities in previous observational findings.
  • To characterize the physical properties of this near-Earth asteroid.

Main Methods:

  • Conducted CCD photometric observations of asteroid 1998 OH in November 2018.
  • Analyzed light curve data to determine rotational characteristics.
  • Compared new data with previous observations to resolve ambiguities.

Main Results:

  • The 2018 photometric data revealed unusual characteristics for asteroid 1998 OH.
  • Two primary possibilities emerged: a low-amplitude, fast-rotating tumbler or a nascent asteroid pair.
  • The asteroid's behavior deviates from typical rotational patterns.

Conclusions:

  • Asteroid 1998 OH presents a unique case requiring further investigation.
  • Its unusual rotational dynamics may indicate an early stage of binary formation or a rare tumbling state.
  • Future observations are essential to definitively determine the asteroid's true nature and rotational state.