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δ-Aquarids Results(2007)

In 2007, the peak time around λo=126°.3 was later than annual year. FWHM and activity level were same as annual year. Sub peak was also observed around λo=122°.5.
Although the increase of activity level was senn around λo=130°.228 again, this compornent was not estimated. This is because the FWHM is too short if this activity means sub peak of δ-Aquarids or Capricorninds. Therefore, this increase means the observed error or unknown meteor short outburst.

Activity Level (using worldwide data)

Observed Peaks

Time(UT) Solar Long. Activity Level
Jul. 25 20h 122°.420 2.63 ± 0.43
Jul. 29 23h 126°.355 4.72 ± 0.71
Aug. 3 00h 130°.228 3.20 ± 1.12

Estimated Compornents of Quadrantid activity

Trail-No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
C07T1 Jul. 26 00h30m 122°.58 1.0 -78.0/+24.0
C07T2 Jul. 30 00h30m 126°.40 3.5 -48.0/+66.0

Parameter

  • Radiant : α = 339°, δ = -16°
  • Radian Elevation : 15° < h < 80°
  • Using data within ± 0.95 σ in all observed data.

Reference

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