Fig. 1 Distributions of the dust trails of Leonids in 2009
I calculated dust trails of Leonids in 2009. I report the simplest results.
Table 1 Data of dust trail of Leonids 2009
| Ej.Year | Date (UT) | Time | Sol. Lon. (2000) | D-r (AU) | Ej.V (m/s) | D-a (AU) | fM | Alp. | Del. | Vg (km/s) | Notice |
| 1466 | 2009/11/17.88 | 21:12 | 235.524 | -0.00085 | +10.10 | 0.101 | 0.085 | 153.97 | +22.11 | 70.61 | ZHR=60 |
| 1533 | 2009/11/17.90 | 21:30 | 235.536 | +0.00031 | +12.68 | 0.134 | 0.083 | 154.30 | +22.89 | 70.44 | ZHR=160 |
| 1466 | 2009/11/17.91 | 21:52 | 235.552 | -0.00066 | +10.25 | 0.103 | 0.031 | 153.97 | +22.08 | 70.61 | ZHR=30 |
Fig. 1 Distributions of the dust trails of Leonids in 2009
Mainly, three trails will encounter the earth.
The expected peak time is at about 21:30 (UT) on Nov 17. However, this prediction include the error of about one hour.
And the value of ZHR is roughly estimated.