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δ-Aquarids Results(2015)

In 2015, the peak was seen around λo125° - 126°. The peak time and activity level was same as annual year. It is possible that the activity level was higher than observed data becase a lot of data that was under zeo value were seen before the peak time. (This means the usual activity level is lower than real activity)
Sub peak arounnd λo131°such as 2013 was not seen.

Activity Level (using worldwide data)

δ-Aquarids

Observed Peaks

Time(UT) Solar Long. Activity Level
Jul. 23 14h 120°.225 2.78 ± 0.16
Jul. 28 14h 125°.000 5.00 ± 1.06

Estimated Compornents of Quadrantid activity

Comp.No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
DAC15C01 Jul. 25 12h30m 122°.055 1.0 -30.0/+42.0
DAC15C02 Jul. 28 20h30m 125°.239 3.0 -36.0/+66.0

Parameter

  • Radiant : α = 339°, δ = -16°
  • Radian Elevation : 10° < 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