As far as meteor showers go, this one is as reliable and predictable as they get. Most comets follow highly elliptical orbits that can take many years to complete, while meteor showers happen around the same time every year. The result is a trail of dust and debris along the trajectory of the comet’s orbit, like a line of chalk left in space. In the case of comets linked to meteor showers, the Earth passes close enough to this trail for its gravity to capture some of the lost material. The Earth’s orbit doesn’t really change from year to year, and the comet’s trail is already there, waiting for us.