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Result of ηAquarids(2009)

The activity level around peak time was same as annual year. The observed peak was 2.0 and estimated peak was about 1.5. Beefore the peak time, the activity aroud λo50° was also seen higher than usuaal activity.The peak was over around λo47°.1. This peak time was earlier than official peak time by International Meteor Organization.
The estimated profile has two activities. One is main activity, one is sub-peak before peak time.

Activity Level (using worldwide data)

Graph of η-Aquarids

Observed Peaks

Time(UT) Solar Long. Activity Level
May 4th 23h 44°.494 1.75 ± 0.35
May 7th 20h 47°.196 2.08 ± 0.22

Estimated Compornents of ηAquarids activity

Trail-No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
EAQ09C01 May 4th 12h30m 44°.050 0.6 -30.0 / +18.0
EAQ09C02 May 7th 15h30m 47°.075 1.2 -42.0 / +66.0

Parameter

  • Radiant : α = 338°, δ = -1°
  • Radiant Drift: Δα = 1°, Δδ = +0°.4
  • Radian Elevation : 20° < 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