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Perseids Results(2011)
The activity level in 2011 was higher than 2010. The estimated ZHR:Zenithal Hourly Rate was around 96. The FWHM of main activity was narrow as two hours.This means unusual activity(not annual activity) or error.
Activity Level (using worldwide data)
Observed Peaks
Time(UT) | Solar Long. | Activity Level |
---|---|---|
Aug.13 01h | 139°.829 | 2.00 ± 0.34 |
Aug.13 04h | 139°.949 | 2.23 ± 0.17 |
Estimated Compornents of Perseid activity
Comp.No. | Peak Time(UT) | Solar Long. | A(max) | FWHM(hr) |
---|---|---|---|---|
PER11C01 | Aug.13 02h30m | 139°.869 | 1.0 | -2.0/+2.0 |
PER11C02 | Aug.13 02h30m | 139°.869 | 0.9 | -18.0/+24.0 |
Parameter
- Radiant : α = 46°.2, δ = +57°.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