2025 Perseids Shower

The annual Perseid meteor shower occurs when debris from Comet Swift-Tuttle intercepts the Earth at a high velocity (59 km/s, 133,000 mph). This debris is somewhat diffuse, so we see activity for many days on either side of the peak. Like most meteor showers, this is named for the constellation its members appear to originate in: Perseus.

This is a composite image of 106 meteors collected on 11/12 August, 86 meteors on 12/13 August, and 43 meteors on 13/14 August. Since the images were collected over many hours, the radiant of the shower is not in a fixed location. However, because most of the meteors occurred between 1 am and 5 am, and because the radiant's high declination means it doesn't move fast, most of the meteors appear to point back to the same general area of the sky - just above the left center of the image. Note also that meteors farther from the radiant tend to make longer trails, since they have a smaller component of their velocity towards the camera.

Most of the meteors in this image are Perseids, but several other showers are also active (Alpha Capricornids, Southern Delta Aquarids, Kappa Cygnids), and those have not been removed from the composite.

The southwest monsoon pattern was active, resulting in reduced transparency and partly cloudy weather. This shower occurred during a full Moon, which reduced the total number of meteors detected. The Moon has been removed from the composite above.