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δ-Aquarids Results(2009)

In 2009, the beginning of activity was around λo118°. The maximum activity level was higher than annual year. The activity profile in this year was very complex. Estimated profiles were three compornents.

Activity Level (using worldwide data)

Observed Peaks

Time(UT) Solar Long. Activity Level
Jul. 24 13h 121°.652 4.19 ± 0.99
Jul. 28 14h 125°.513 6.24 ± 0.13
Aug. 1 15h 129°.376 3.43 ± 0.67

Estimated Compornents of Quadrantid activity

Trail-No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
C09T1 Jul. 24 13h30m 121°.65 2.0 -12.0/+18.0
C09T2 Jul. 27 18h30m 124°.72 5.0 -42.0/+72.0
C09T3 Aug. 1 12h30m 129°.26 2.0 -12.0/+18.0

Parameter

  • Radiant : α = 339°, δ = -16°
  • Radian Elevation : 15° < h < 80°
  • 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