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Perseids Results(2008)

In 2008, Perseids showed unusual activity profile. The annual peak time was earlier as λo139°.6. Around λo 140°.6, however, it was very high acvtivity since 2004. This activity was however very short FWHM (especially, after the peak).

Activity Level (using worldwide data)

Observed Peaks

Time(UT) Solar Long. Activity Level
Aug.12 02h 139°.646 1.38 ± 0.25
Aug.13 03h 140°.645 2.33 ± 0.46

Estimated Compornents of Perseid activity

Comp.No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
PER08C01 Aug.12 02h30m 139°.646 1.0 -10.0/+10.0
PER08C02 Aug.13 03h30m 140°.645 2.0 -4.0/+1.0

Parameter

  • Radiant : α = 46°.2, δ = +57°.4
  • Radian Elevation : 20° < h
  • Using data within ± 0.75 σ in all observed data.

Reference

  • Structure of meteor activity is estimated by "Lorentz profile".
  • Observed data provided by RMOJ and RMOB