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δ-Aquarids Results(2017)

δ-Aquarids in 2017 has a possibility that it showed the weakest activity in past 10 years. The increase of activity stopped around Solar Longitude 122°-123°. This is same profile as annual year. After the peak, the decrease stopped around Solar Longitude 132°-133° clearly.

Activity Level (using worldwide data)

δ-Aquarids

Observed Peaks

Time(UT) Solar Long. Activity Level
Jul. 29 07h 126°.143 4.07 ± 0.67

Estimated Compornents of Quadrantid activity

Comp.No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
DAC17C01 Jul. 24 15h30m 121°.683 0.6 -24.0/+24.0
DAC17C02 Jul. 29 16h30m 126°.502 2.5 -72.0/+84.0
DAC17C03 Aug. 05 12h30m 133°.040 1.0 -30.0/+48.0

Parameter

  • Radiant : α = 339°, δ = -16°
  • Radian Elevation : 20° < 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