COMETS A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site Donati's Comet (C/1858 L1) Donati's Comet, as seen above Paris, October 1858. Contemporary engraving One of the brightest and most visible comets of the 19th century; it was discovered by Giovanni Donati on June 2, 1858, brightened to magnitude -1 in September 1858, reached perihelion on September 30, came closest to Earth (0.5 AU) on October 9, and was last seen on March 4, 1859. Around the time of closest approach the Earth, the comet developed a prominent dust tail, up to 60° long and curved like a scimitar, for which it is best remembered. perihelion 0.58 AU eccentricity 0.996 inclination 117.0° period about 2,000 years Related category     • COMETS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP