Halleytype
Halleytype (also Halley-type) is a designation used in cometary astronomy to classify short-period comets with orbital periods typically between about 20 and 200 years. The class is named after Halley's Comet (1P/Halley), the best-known member and the prototype of the group.
Orbits of Halley-type comets are generally highly elliptical and can have a wide range of orbital inclinations,
Most Halley-type comets are believed to originate from the Oort cloud, from which planetary perturbations can
Notable Halley-type comets include 1P/Halley and 109P/Swift-Tuttle. The study of HTCs contributes to understanding cometary nuclei