466 Tisiphone
Encyclopedia
466 Tisiphone is an 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...

 which orbits among the Cybele family
Cybele asteroid
Cybele asteroids are a group of asteroids in the outer main belt with a semi-major axis between 3.27 AU and 3.7 AU, an eccentricity less than 0.3, and an inclination less than 25°. The group is named for the asteroid 65 Cybele...

 of asteroids.

Discovery

It was discovered by Max Wolf
Max Wolf
Maximilian Franz Joseph Cornelius Wolf was a German astronomer and a pioneer in the field of astrophotography...

 and Luigi Carnera
Luigi Carnera
Luigi Carnera was an Italian astronomer.In his early career he worked as Max Wolf's assistant at Heidelberg, Germany and discovered a number of asteroids...

 on January 17, 1901, and was assigned the provisional designation 1901 FX. It was named after Tisiphone
Tisiphone
Tisiphone is the name of two figures in Greek mythology.-Erinyes:Tisiphone was one of the Erinyes or Furies, and sister of Alecto and Megaera. She was the one who punished crimes of murder: parricide, fratricide and homicide...

 of 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...

.

Physical properties

A number of positional observations of Tisiphone were carried out in 1907, 1913, and 1914.

In 1992 a simple check of 466 Tisiphone's position was made by the Association of Lunar and Planetary Observers
Association of Lunar and Planetary Observers
The Association of Lunar and Planetary Observers is an international scientific and educational organization established in March, 1947 in the United States by Walter H. Haas, and later incorporated in 1990...

 (ALPO). The asteroid was found to be in the expected position to within observational errors. Further checks were carried out in 1996, and 2006 with the asteroid in its expected position both times.

In 1997 Tisiphone was studied by Worman and Christianson at the Feder Observatory located near Minnesota State University, Moorhead, with the goal of determining its rotational period. A period of 8.824 ± 0.009 was arrived at, with the lightcurve data showing two distinct maxima and minima in its rotation.

In 2001 Lagerkvist et al. published their results on a study of the Cybele asteroid family, which includes 466 Tisiphone. Relative photometric
Photometry (astronomy)
Photometry is a technique of astronomy concerned with measuring the flux, or intensity of an astronomical object's electromagnetic radiation...

 observations of Tisiphone were carried out in 1998 and 1999 using the 1.2 m telescope at the Calar Alto Observatory
Calar Alto Observatory
The Calar Alto Observatory is an astronomical observatory owned and operated jointly by the Max-Planck-Institut für Astronomie in Heidelberg, Germany, and the Instituto...

 located at the Max-Planck-Institut für Astronomie in Heidelberg
Heidelberg
-Early history:Between 600,000 and 200,000 years ago, "Heidelberg Man" died at nearby Mauer. His jaw bone was discovered in 1907; with scientific dating, his remains were determined to be the earliest evidence of human life in Europe. In the 5th century BC, a Celtic fortress of refuge and place of...

, Germany
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

. They were able to confirm the 8.8 hour rotation period obtained by Worman and Christianson.

In 2006 Fornasier et al. published polarimetric
Polarimetry
Polarimetry is the measurement and interpretation of the polarization of transverse waves, most notably electromagnetic waves, such as radio or light waves...

data for a number of asteroids, including 466 Tisiphone.
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