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Result of η-Aquariids(2017)

The activity level in this year was higher than annual year. The latest higher activity was shown in 2013. The peak around Solar Longitude=44°.3 was predicted peak by several researchers.
The annual peak which has a peak around 45°.5 was shown around 45°.4-45°.6. The second graph in the next section shows the comparision between 2017 η-Aquariids and annual activity covering the period 2004-2017(red-line). This graph says 2017 η-Aqiariids was higher activity than annual year.

Activity Level (using worldwide data)

Graph of η-Aquariids

Observed Peaks

Time(UT) Solar Long. Activity Level
May 4th 20h 44°.321 2.10 ± 0.31
May 6th 06h 45°.693 1.56 ± 0.30

Estimated Compornents of ηAquariids activity

Trail-No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
EAQ17C01 May 4th 20h30m 44°.32 1.1 -3.0 / +3.0
EAQ17C02 May 5th 23h30m 45°.41 1.3 -48.0 / +42.0
EAQ17C03 May 10th 03h30m 49°.44 0.5 -18.0 / +24.0

Parameter

  • Radiant : α = 338°, δ = -1°
  • Radiant Drift: Δα = 1°, Δδ = +0°.4
  • Radian Elevation : 15° < h
  • 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