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Perseids Results(2009)

In 2009, the peak time was around 20h 12th(UT), λo140°.12. The activity level was same as annual year.

Activity Level (using worldwide data)

Observed Peaks

Time(UT) Solar Long. Activity Level
Aug.12 20h 140°.116 1.90 ± 0.81

Estimated Compornents of Perseid activity

Comp.No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
PER09C01 Aug.12 14h00m 139°.876 0.6 -18.0/+3.0
PER09C02 Aug.13 20h00m 140°.116 1.7 -2.5/+4.0

Parameter

  • Radiant : α = 46°.2, δ = +57°.4
  • Radian Elevation : 20° < h
  • Using data within ± 1.00 σ in all observed data.

Reference

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