271 Penthesilea is a mid-sized main belt

asteroid An asteroid is a minor planet—an object larger than a meteoroid that is neither a planet nor an identified comet—that orbits within the Solar System#Inner Solar System, inner Solar System or is co-orbital with Jupiter (Trojan asteroids). As ...

that was discovered by Viktor Knorre on 13October 1887 in

Berlin Berlin ( ; ) is the Capital of Germany, capital and largest city of Germany, by both area and List of cities in Germany by population, population. With 3.7 million inhabitants, it has the List of cities in the European Union by population withi ...

. It was his last asteroid discovery. The asteroid was named after

Penthesilea Penthesilea () was an Amazonian queen in Greek mythology, the daughter of Ares and Otrera and the sister of Hippolyta, Antiope, and Melanippe. She assisted Troy in the Trojan War, during which she was killed by Achilles or Neoptolemus. The ...

, the mythical

Greek Greek may refer to: Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group *Greek language, a branch of the Indo-European language family **Proto-Greek language, the assumed last common ancestor of all kno ...

queen of the

Amazons The Amazons (Ancient Greek: ', singular '; in Latin ', ') were a people in Greek mythology, portrayed in a number of ancient epic poems and legends, such as the Labours of Hercules, Labours of Heracles, the ''Argonautica'' and the ''Iliad''. ...

. Photometric observations of this asteroid were made in early 2009 at the Organ Mesa Observatory in

Las Cruces, New Mexico Las Cruces (; ; lit. 'the crosses') is the List of municipalities in New Mexico, second-most populous city in the U.S. state of New Mexico and the county seat, seat of Doña Ana County, New Mexico, Doña Ana County. As of the 2020 United States ce ...

. The resulting

light curve In astronomy, a light curve is a graph (discrete mathematics), graph of the Radiance, light intensity of a celestial object or region as a function of time, typically with the magnitude (astronomy), magnitude of light received on the ''y''-axis ...

shows a synodic

rotation period In astronomy, the rotation period or spin period of a celestial object (e.g., star, planet, moon, asteroid) has two definitions. The first one corresponds to the '' sidereal rotation period'' (or ''sidereal day''), i.e., the time that the objec ...

of 18.787 ± 0.001 hours with a brightness variation of 0.32 ± 0.04 in

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 ...

References

External links

* * Background asteroids

PC-type asteroids (Tholen) 18871013 {{Beltasteroid-stub