Zero. That's not even in the true atmosphere at that point. The kerosene droplets will rapidly evaporate into free molecules and then diffuse around the mesosph

Zero. That's not even in the true atmosphere at that point. The kerosene droplets will rapidly evaporate into free molecules and then diffuse around the mesosphere/thermosphere for months/years until radiation breaks it down into first lighter hydrocarbons, then carbon dioxide and water.