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δ-Aquarids Results(2006)

In 2006, the main peak was same as annual year around λo125°. The activity level was also same as annual year. Before the main peak, on the other hand, the sub peak around λo122° was clearly. After the main peak, the decrease of activity was slowly around λo128°.
The increse of λo136° means the beginning of Perseid main activity.

Activity Level (using worldwide data)

Observed Peaks

Time(UT) Solar Long. Activity Level
Jul. 24 17h 121°.584 2.62 ± 0.91
Jul. 28 15h 125°.331 4.81 ± 0.38

Estimated Compornents of Quadrantid activity

Trail-No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
C06T1 Jul. 24 18h30m 121°.63 1.0 -30.0/+12.0
C06T2 Jul. 28 12h30m 125°.22 4.0 -54.0/+60.0
C06T3 Aug.01 18h30m 129°.28 1.5 -36.0/+60.0

Parameter

  • Radiant : α = 339°, δ = -16°
  • Radian Elevation : 15° < h < 80°
  • Using data within ± 0.70 σ in all observed data.

Reference

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