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δ-Aquarids Results(2005)

The peak in 2005 was around λo129°.5 (29th Jul). The decrease after main peak around 129° was slowly. The beginning of activity was around 119°. The activity level and FWHM were same as annual year.

Activity Level (using worldwide data)

Observed Peaks

Time(UT) Solar Long. Activity Level
Jul. 25 13h 122°.624 3.05 ± 1.04
Jul. 28 17h 125°.643 3.98 ± 0.11
Aug. 1 19h 129°.555 2.58 ± 0.78

Estimated Compornents of Quadrantid activity

Trail-No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
C05T1 Jul. 24 06h30m 121°.39 0.5 -60.0/+30.0
C05T2 Jul. 29 00h30m 125°.93 3.5 -54.0/+54.0
C05T3 Aug. 2 00h30m 129°.76 1.0 -30.0/+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