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Perseids Results(2015)

2015 Perseids showed high activity since 2011. Maximum activiy levels were over 2.0. The peak time was around λo140°.00.
This main peak was not annual compornent because FWHM of this activity was very short. The annual compornet was code:PER15C01 with A(max)=2.0 at λo139°.8. Code:PER15C02 means the sub-peak activity.

Activity Level (using worldwide data)

2015Perseids結果

Observed Peaks

Time(UT) Solar Long. Activity Level
Aug.13 01h 139°.802 2.14 ± 0.38
Aug.13 06h 140°.002 3.40 ± 0.38

Estimated Compornents of Perseid activity

Comp.No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
PER15C01 Aug.13 01h30m 139°.802 2.0 -10.0/+18.0
PER15C02 Aug.13 06h30m 140°.002 1.5 -1.0/+2.0

Parameter

  • Radiant : α = 46°.2, δ = +57°.4
  • Radian Elevation : 20° < h
  • Using data within ± 0.60 σ in all observed data.

Reference

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