84 Klio is a quite large and very dark main-belt asteroid

Asteroid

Asteroids are a class of small Solar System bodies in orbit around the Sun. They have also been called planetoids, especially the larger ones...

. It was discovered by R. Luther

Karl Theodor Robert Luther

Karl Theodor Robert Luther , normally published as Robert Luther, was a German astronomer who searched for asteroids while working in Düsseldorf....

 on August 25, 1865, and named after Clio

Clio

thumb|Clio—detail from [[The Art of Painting|The Allegory of Painting]] by [[Johannes Vermeer]]In Greek mythology, Clio or Kleio, is the muse of history. Like all the muses, she is a daughter of Zeus and Mnemosyne...

, the Muse

Muse

The Muses in Greek mythology, poetry, and literature, are the goddesses who inspire the creation of literature and the arts. They were considered the source of the knowledge, related orally for centuries in the ancient culture, that was contained in poetic lyrics and myths...

 of history

History

History is the discovery, collection, organization, and presentation of information about past events. History can also mean the period of time after writing was invented. Scholars who write about history are called historians...

 in Greek mythology

Greek mythology

Greek mythology is the body of myths and legends belonging to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices. They were a part of religion in ancient Greece...

. The name Clio had previously been suggested by the discoverer of 12 Victoria

12 Victoria

12 Victoria is a large main-belt asteroid.It was discovered by J. R. Hind on September 13, 1850.Victoria is officially named after the Roman goddess of victory, but the name also honours Queen Victoria. The goddess Victoria was the daughter of Styx by the Titan Pallas...

, and that is the name B. A. Gould

Benjamin Apthorp Gould

Benjamin Apthorp Gould was a pioneering American astronomer. He is notable for creating the Astronomical Journal, discovering the Gould Belt, and for founding of the Argentine National Observatory and the Argentine National Weather Service.-Biography:He was born in Boston, Massachusetts, son of...

, editor of the prestigious Astronomical Journal

Astronomical Journal

The Astronomical Journal is a peer-reviewed monthly scientific journal owned by the American Astronomical Society and currently published by Institute of Physics Publishing. It is one of the premier journals for astronomy in the world...

, adopted for that asteroid, because of the controversy over the name Victoria.
An occultation

Occultation

An occultation is an event that occurs when one object is hidden by another object that passes between it and the observer. The word is used in astronomy . It can also refer to any situation wherein an object in the foreground blocks from view an object in the background...

 by Klio over a dim star

Star

A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...

 was observed on April 2, 1997.

Perturbation

Perturbations

Perturbation (astronomy)

Perturbation is a term used in astronomy in connection with descriptions of the complex motion of a massive body which is subject to appreciable gravitational effects from more than one other massive body....

 of asteroid 52 Europa

52 Europa

52 Europa is one of the larger asteroids in the asteroid belt, having a diameter of 300 km. It was discovered on February 4, 1858, by Hermann Goldschmidt from his balcony in Paris...

by 84 Klio suggest that 52 Europa would have a mass as high as 1.68 kg. But this would require Europa to have an unrealistic density of 10.6 g/cm³. Further observations of Klio will be needed to properly refine the mass of both asteroid Europa and Klio.