20D/Westphal
Comet
20D/Westphal was a periodic comet with an orbital period of 61 years. It fits the classical definition of a Halley-type comet. The comet appeared to disintergrate during the 1913 apparition and hasn't been observed since then.
The comet was... Wikipedia
Discovered: July 24, 1852
Orbits: Sun
Discoverer: Justus Georg Westphal
Last perihelion: January 3, 1976? (unobserved)
Next perihelion: May 4, 2038?; (lost since 1913)