| Proper Name | Swift-Tuttle | | Designation | 109P | | Orbital inclination to the Ecliptic | 113.45° | | Orbital Period | 133.3 years | | Distance from the Sun | Semi-Major Axis: 3,903,308,600 km (26.09 AU)
Perihelion: 143,641,700 km (0.96 AU)
Aphelion: 7,662,973,500 km (51.22 AU) | | Eccentricity | 0.9632 | | Notes | This comet was discovered independently in 1862 by Lewis Swift and Horace Parnell Tuttle, and bears both of their names. In common with many comets, it is the source of a regular meteor shower, specifically the prominent Perseid shower see on Earth during late July and early August each year. |
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