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Result of Leonids (2009)

Leonids 2009 was expected by many osbervers since many researchers published its predictions. The predicted peak time was around 22h(UT) on 17th.
The main peak was over around 21h(UT) on 17th with A(t)=2.9. This peak had a narrow FWHM such as 1 - 1.5 hours. Besides, some sub-peak and base-activity compornents were observed.
The estimated ZHR using radio meteor osebervations was ZHRR=43 (main peak).

Activity Graph (using worldwide data)

Observed Peaks

Time(UT) Solar Long. Activity Level
Nov.15 16h 233°.309 0.72 ± 0.37
Nov.17 21h 235°.536 2.93 ± 0.53
Nov.18 21h 236°.545 1.64 ± 0.73

Estimated Compornents of Leonids activity

Comp.-No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
LEO09C01 Nov.15 18h30m 233°.393 0.5 -2.5 / +1.0
LEO09C02 Nov.17 21h30m 235°.536 2.5 -1.5 / +1.0
LEO09C03 Nov.18 21h30m 236°.545 1.0 -1.0 / +2.0
LEO09C04 Nov.17 14h 235°.2 0.5 -24.0 / +24.0

Reference

  • 15° < R.P. < 80°
  • Structure of meteor activity is estimated by "Lorentz profile".
  • Observed data provided by RMOJ and RMOB