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δ-Aquarids Results(2011)

In 2011, the beginning of activity was around λo120°. The activity profile was also same as annual year. On the other hand, the peak time was earlier than last year. The activity level was lower than 2010.
After tha main peak, the sub peak was seen around λo127°.9.

Activity Level (using worldwide data)

Aquarids

Observed Peaks

Time(UT) Solar Long. Activity Level
Jul. 28 15h 125°.066 4.28 ± 0.10
Jul. 31 14h 127°.895 4.87 ± 0.92

Estimated Compornents of Quadrantid activity

Trail-No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
C11T1 Jul. 25 12h30m 122°.08 1.5 -60.0/+42.0
C11T2 Jul. 29 00h30m 125°.42 3.0 -36.0/+36.0
C11T3 Jul. 31 18h30m 128°.05 2.0 -24.0/+60.0

Parameter

  • Radiant : α = 339°, δ = -16°
  • Radian Elevation : 15° < h < 70°
  • 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