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δ-Aquarids Results(2016)

δ-Aquarids in 2016 showed annual activity level. The beginning of clear activity was seen around 20th July, which was λo=118°. It was earlier than last activity. It was same as 2008 and 2011.
Besids of this main peak, the inrease of activity level was seen around λo=131°.5 such as 2013.
Although it is possible to estimate one activity profile which has a peak around λo=131°.5, FWHM profile of main peak was unnatural(very short after tha main peak...). In this year, therefore, the estimated activity was only one activity profile.

Activity Level (using worldwide data)

δ-Aquarids

Observed Peaks

Time(UT) Solar Long. Activity Level
Jul. 27 23h 125°.147 4.35 ± 0.49
Jul. 29 14h 126°.661 4.68 ± 0.81

Estimated Compornents of Quadrantid activity

Comp.No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
DAC16C01 Jul. 28 20h30m 125°.944 3.5 -90.0/+96.0

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