6377 Cagney, provisional designation , is a carbonaceous Eunomia

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 ...

from the central region of the

asteroid belt The asteroid belt is a torus-shaped region in the Solar System, centered on the Sun and roughly spanning the space between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies called asteroids ...

, approximately 9 kilometers in diameter. The asteroid was discovered on 25 June 1987, by Czech astronomer

Antonín Mrkos Antonín Mrkos () (27 January 1918 – 29 May 1996) was a Czech astronomer. Biography Mrkos entered the University in Brno in 1938. His studies were interrupted by the onset of World War II, and in 1945 he became a staff member at the Skalna ...

at South Bohemian

Kleť Observatory Kleť Observatory (; obs. code: 046) is an astronomical observatory in the Czech Republic. It is situated in South Bohemia, south of the summit of Mount Kleť, near the town of České Budějovice. Constructed in 1957, the observatory is at an ...

in the Czech Republic. It was named after American actor and dancer

James Cagney James Francis Cagney Jr. (; July 17, 1899March 30, 1986) was an American actor and dancer. On stage and in film, he was known for his consistently energetic performances, distinctive vocal style, and deadpan comic timing. He won acclaim and maj ...

Orbit and classification

''Cagney'' is a member of the

Eunomia family The Eunomia or Eunomian family () is a large asteroid family of S-type asteroids named after the asteroid 15 Eunomia. It is the most prominent family in the intermediate asteroid belt and the 6th-largest family with nearly six thousand known member ...

, the most prominent family of otherwise stony asteroids in the intermediate main-belt. It orbits the Sun at a distance of 2.2–3.0 AU once every 4 years and 3 months (1,550 days). Its orbit has an

eccentricity Eccentricity or eccentric may refer to: * Eccentricity (behavior), odd behavior on the part of a person, as opposed to being "normal" Mathematics, science and technology Mathematics * Off-Centre (geometry), center, in geometry * Eccentricity (g ...

of 0.16 and an

inclination Orbital inclination measures the tilt of an object's orbit around a celestial body. It is expressed as the angle between a reference plane and the orbital plane or axis of direction of the orbiting object. For a satellite orbiting the Eart ...

of 15 ° with respect to the

ecliptic The ecliptic or ecliptic plane is the orbital plane of Earth's orbit, Earth around the Sun. It was a central concept in a number of ancient sciences, providing the framework for key measurements in astronomy, astrology and calendar-making. Fr ...

. A first

precovery In astronomy, precovery (short for pre-discovery recovery) is the process of finding the image of a celestial object in images or photographic plates predating its discovery, typically for the purpose of calculating a more accurate orbit. This ha ...

was taken at

Palomar Observatory The Palomar Observatory is an astronomical research observatory in the Palomar Mountains of San Diego County, California, United States. It is owned and operated by the California Institute of Technology (Caltech). Research time at the observat ...

in 1951, extending the body's

observation arc In observational astronomy, the observation arc (or arc length) of a Solar System body is the time period between its earliest and latest observations, used for tracing the body's path. It is usually given in days or years. The term is mostly use ...

by 36 years prior to its official discovery observation at Klet.

Physical characteristics

''Cagney'' has been characterized as a carbonaceous

C-type asteroid C-type (carbonaceous ) asteroids are the most common variety, forming around 75% of known asteroids. They are volatile-rich and distinguished by a very low albedo because their composition includes a large amount of carbon, in addition to rocks ...

by PanSTARRS photometric survey.

Lightcurve

A rotational

lightcurve 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 ...

of ''Cagney'' was obtained by Slovak astronomer Adrián Galád at Modra Observatory in February 2008. Lightcurve analysis gave a well-defined

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 hours with a brightness variation of 0.20

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 ...

().

Diameter and albedo

According to the survey carried out by the

NEOWISE Wide-field Infrared Survey Explorer (WISE, observatory code C51, Explorer 92 and MIDEX-6) was a NASA infrared astronomy space telescope in the Explorers Program launched in December 2009.. . WISE discovered thousands of minor planets and nu ...

mission of NASA's

Wide-field Infrared Survey Explorer Wide-field Infrared Survey Explorer (WISE, List of observatory codes, observatory code C51, Explorer 92 and MIDEX-6) was a NASA infrared astronomy Space observatory, space telescope in the Explorers Program launched in December 2009.. . WISE L ...

, ''Cagney'' measures 9.38 kilometers in diameter and its surface has an

albedo Albedo ( ; ) is the fraction of sunlight that is Diffuse reflection, diffusely reflected by a body. It is measured on a scale from 0 (corresponding to a black body that absorbs all incident radiation) to 1 (corresponding to a body that reflects ...

of 0.16. The ''Collaborative Asteroid Lightcurve Link'' assumes an

of 0.21 (which is typical for stony asteroids) and calculates a diameter of 8.76 kilometers with an absolute magnitude of 12.6.

Naming

This

minor planet According to the International Astronomical Union (IAU), a minor planet is an astronomical object in direct orbit around the Sun that is exclusively classified as neither a planet nor a comet. Before 2006, the IAU officially used the term ''minor ...

was named in memory of American actor and dancer

(1899–1986), remembered best for playing multifaceted tough guys in movies such as ''

The Public Enemy ''The Public Enemy'' (''Enemies of the Public'' in the UK) is a 1931 American pre-Code gangster film produced and distributed by Warner Bros. The film was directed by William A. Wellman, and starring James Cagney, Jean Harlow, Edward Woods ...

'' (1931) and ''

Angels with Dirty Faces ''Angels with Dirty Faces'' is a 1938 American crime drama film directed by Michael Curtiz for Warner Brothers. It stars James Cagney, Pat O'Brien, The Dead End Kids, Humphrey Bogart, Ann Sheridan, and George Bancroft. The screenplay was wr ...

'' (1938). In 1942, Cagney won the Oscar for his energetic portrayal of

George M. Cohan George Michael Cohan (July 3, 1878November 5, 1942) was an American entertainer, playwright, composer, lyricist, actor, singer, dancer and theatrical producer. Cohan began his career as a child, performing with his parents and sister in a vaudev ...

in ''

Yankee Doodle Dandy ''Yankee Doodle Dandy'' is a 1942 American biographical musical drama film about George M. Cohan, known as "The Man Who Owned Broadway". It stars James Cagney, Joan Leslie, Walter Huston, and Richard Whorf, and features Irene Manning, Geo ...

''. The official naming citation was published by the

Minor Planet Center The Minor Planet Center (MPC) is the official body for observing and reporting on minor planets under the auspices of the International Astronomical Union (IAU). Founded in 1947, it operates at the Smithsonian Astrophysical Observatory. Funct ...

on 20 June 1997 ().

References

External links

Asteroid Lightcurve Database (LCDB)
query form

)
Dictionary of Minor Planet Names
Google books

– Observatoire de Genève, Raoul Behrend

– Minor Planet Center * * {{DEFAULTSORT:Cagney 006377 Discoveries by Antonín Mrkos Named minor planets 19870625