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(20882) 2000 VH57: AN INNER MAIN-BELT BINARY ASTEROID.

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The inner main-belt asteroid (20882) 2000 VH57 was found to be a binary system. Its primary rotates every 2.5586 hours, and its satellite orbits every 32.81 hours.

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Area of Science:

  • Astronomy and astrophysics
  • Solar system exploration

Background:

  • Asteroid (20882) 2000 VH57 is located in the inner main belt.
  • Binary asteroids are crucial for understanding asteroid formation and evolution.

Purpose of the Study:

  • To investigate the physical and orbital characteristics of asteroid (20882) 2000 VH57.
  • To determine if the asteroid is a binary system and characterize its components.

Main Methods:

  • Conducted CCD photometric observations from September 15 to October 20, 2018.
  • Analyzed lightcurve data to identify rotational and orbital periods.
  • Utilized mutual eclipse/occultation events to estimate the size ratio of the components.

Main Results:

  • Confirmed asteroid (20882) 2000 VH57 is a binary system.
  • Determined a primary rotational period of 2.5586 hours.
  • Established a satellite orbital period of 32.81 hours.
  • Calculated a lower limit for the secondary-to-primary mean diameter ratio (Ds/Dp) of 0.23.
  • Observed changes in lightcurve depth, indicating evolving viewing aspect.

Conclusions:

  • Asteroid (20882) 2000 VH57 is a binary asteroid with well-defined rotational and orbital parameters.
  • The observed changes in lightcurve suggest dynamic interactions or aspect angle variations within the binary system.
  • Further observations could refine the understanding of this binary asteroid's properties.