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Perseids Results(2011)

The activity level in 2011 was higher than 2010. The estimated ZHR:Zenithal Hourly Rate was around 96. The FWHM of main activity was narrow as two hours.This means unusual activity(not annual activity) or error.

Activity Level (using worldwide data)

2011Perseids結果

Observed Peaks

Time(UT) Solar Long. Activity Level
Aug.13 01h 139°.829 2.00 ± 0.34
Aug.13 04h 139°.949 2.23 ± 0.17

Estimated Compornents of Perseid activity

Comp.No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
PER11C01 Aug.13 02h30m 139°.869 1.0 -2.0/+2.0
PER11C02 Aug.13 02h30m 139°.869 0.9 -18.0/+24.0

Parameter

  • Radiant : α = 46°.2, δ = +57°.4
  • Radian Elevation : 20° < h
  • Using data within ± 0.50 σ in all observed data.

Reference

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