Klio (
minor planet designation: 84 Klio) is a fairly large and very dark
main-belt
The asteroid belt is a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies, of many sizes, but much smaller than planets, called ...
asteroid. It was discovered by
R. Luther on August 25, 1865, and named after
Clio
In Greek mythology, Clio ( , ; el, Κλειώ), also spelled Kleio, is the muse of history, or in a few mythological accounts, the muse of lyre playing.
Etymology
Clio's name is etymologically derived from the Greek root κλέω/κλεί ...
, the
Muse
In ancient Greek religion and mythology, the Muses ( grc, Μοῦσαι, Moûsai, el, Μούσες, Múses) are the inspirational goddesses of literature, science, and the arts. They were considered the source of the knowledge embodied in the ...
of
history
History (derived ) is the systematic study and the documentation of the human activity. The time period of event before the invention of writing systems is considered prehistory. "History" is an umbrella term comprising past events as well ...
in
Greek mythology
A major branch of classical mythology, Greek mythology is the body of myths originally told by the ancient Greeks, and a genre of Ancient Greek folklore. These stories concern the origin and nature of the world, the lives and activities ...
. The name Clio had previously been suggested by the discoverer of
12 Victoria, and that is the name
B. A. Gould, editor of the prestigious
Astronomical Journal
''The Astronomical Journal'' (often abbreviated ''AJ'' in scientific papers and references) is a peer-reviewed monthly scientific journal owned by the American Astronomical Society (AAS) and currently published by IOP Publishing. It is one of th ...
, adopted for that asteroid, because of the controversy over the name Victoria.
An
occultation
An occultation is an event that occurs when one object is hidden from the observer by another object that passes between them. The term is often used in astronomy, but can also refer to any situation in which an object in the foreground blocks ...
by Klio over a dim
star was observed on April 2, 1997.
Photometric observations of this asteroid during 2007 at the Organ Mesa Observatory in
Las Cruces, New Mexico
Las Cruces (; "the crosses") is the second-largest city in the U.S. state of New Mexico and the seat of Doña Ana County. As of the 2020 census the population was 111,385. Las Cruces is the largest city in both Doña Ana County and southern Ne ...
were used to create a
light curve
In astronomy, a light curve is a graph of light intensity of a celestial object or region as a function of time, typically with the magnitude of light received on the y axis and with time on the x axis. The light is usually in a particular frequ ...
plot. This showed a
synodic rotation period of 23.562 ± 0.001 hours and a brightness variation of 0.21 ± 0.02
magnitude
Magnitude may refer to:
Mathematics
*Euclidean vector, a quantity defined by both its magnitude and its direction
*Magnitude (mathematics), the relative size of an object
*Norm (mathematics), a term for the size or length of a vector
*Order of ...
during each cycle.
Perturbation
Perturbations of asteroid
52 Europa by 84 Klio suggest that 52 Europa would have a mass as high as 1.68 kg.
[(High estimate for mass of asteroid Europa 0.851 / Mass of Ceres 4.75) * Mass of Ceres 9.43E+20 = 1.689E+20] But this would require Europa to have an unrealistic density of 10.6 g/cm
3.
[ Further observations of Klio will be needed to properly refine the mass of both asteroid Europa and Klio.
]
References
External links
*
*
Klio asteroids
Klio
Klio
G-type asteroids (Tholen)
Ch-type asteroids (SMASS)
18650825
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