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Quadrantids Results(2011)

In 2011, Quadrantid peak was observed around λo=282°.875 (15h 3rd UT). This was earlier than annual peak time. The activity level was same as annual year. In addition, the sub peak was observed around λo=283°.003 (21h 3rd UT). Almost observing stations were caught. It is very interesting what this reason is.

Activity Level (using worldwide data)

Observed Peaks

Time(UT) Solar Long. Activity Level
Jan. 3 18h 282°.875 5.07 ± 0.88
Jan. 3 21h 283°.003 4.26 ± 1.11

Estimated Compornents of Quadrantid activity

Comp.No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
QUA11C01 Jan. 3 19h30m 282°.918 4.0 -4.0/+7.0

Parameter

  • Radiant : α = 230°.1, δ = +48°.5
  • Radian Elevation : 20° < h < 80°
  • Using data within ± 0.75 σ in all observed data.

Reference

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