Long-Period Comets
Comets on orbits longer than ~200 years, arriving from the Oort cloud.
- Hale–BoppC/1995
The 'Great Comet of 1997', a long-period comet with an exceptionally large, active nucleus that remained visible to the naked eye for a record 18 months.
TypeLong-period cometDiscovered1995Great cometYes - HyakutakeC/1996
The 'Great Comet of 1996', which passed very close to Earth and displayed one of the longest comet tails ever recorded.
TypeLong-period cometDiscovered1996Great cometYes - McNaughtC/2006
The 'Great Comet of 2007', the brightest comet in decades, whose vast fanned dust tail was a spectacular sight from the Southern Hemisphere.
TypeLong-period cometDiscovered2006Great cometYes - NEOWISEC/2020
The brightest comet visible from the Northern Hemisphere since Hale–Bopp, a naked-eye spectacle in July 2020 discovered by the NEOWISE space telescope.
TypeLong-period cometDiscovered2020Great cometYes - Siding SpringC/2013
A long-period comet that made an exceptionally close pass of Mars in October 2014, observed up close by the fleet of Mars orbiters and rovers.
TypeLong-period cometDiscovered2013 - ThatcherC/1861
A long-period comet on a roughly 415-year orbit, the parent body of the Lyrid meteor shower seen each April.
TypeLong-period cometPeriod415 yrDiscovered1861