177P/Barnard

Comet 177P/Barnard, also known as Barnard 2, is a [List of List of periodic comets|periodic comets|periodic] comet with an orbital period of 122 years. It fits the classical definition of a Halley-type comet with. It orbits near the ecliptic plane and has aphelion near the Kuiper cliff at.
The comet, also designated P/2006 M3, was discovered by Edward Emerson Barnard on June 24, 1889, and was re-discovered after 116 years. On July 19, 2006, 177P came within of Earth. From late July through September 2006 it was slightly brighter than expected at 8th magnitude in the constellations Hercules and then Draco. Perihelion was August 28, 2006. It was last observed in December 2006 when it was about from the Sun.
The only numbered comets with an orbital period longer than 177P/Barnard are: 153P/Ikeya–Zhang, 273P/Pons–Gambart, 35P/Herschel–Rigollet, and 109P/Swift-Tuttle.
Of Barnard's other two periodic comets, the first, D/1884 O1 was last seen on November 20, 1884, and is thought to have disintegrated. The last, 206P/Barnard-Boattini marked the beginning of a new era in cometary astronomy, as it was the first to be discovered by photography. It was a lost comet after 1892, until accidentally rediscovered on October 7, 2008, by Andrea Boattini.