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Quadrantids Results(2008)

In 2008, the main peak was provided around 283°.15 (06h 4th(UT)). The activity level was weaker than annual year. The clear activity started around 282°. Observed FWHM was same as annual year.
In addition, another peak was obseved around 18h 2nd(UT) 281°.62. It was impossible that this activity was provided by Quadrantids or not.

Activity Level (using worldwide data)

Observed Peaks

Time(UT) Solar Long. Activity Level
Jan. 4 06h 283°.152 3.87 ± 1.25

Estimated Compornents of Quadrantid activity

Comp.No. Peak Time(UT) Solar Long. A(max) FWHM(hr)
QUA08C01 Jan. 3 20h30m 282°.724 2.0 -4.5/+8.0
WQUA2008C02 Jan. 4 06h30m 283°.152 3.0 -4.0/+6.0

Parameter

  • Radiant : α = 230°.1, δ = +48°.5
  • Radian Elevation : 15° < 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