866 Fatme ('' prov. designation:'' ''or'' ) is a large background asteroid, approximately in diameter, located in the outer region of the asteroid belt. It was discovered by German astronomer

Max Wolf Maximilian Franz Joseph Cornelius Wolf (21 June 1863 – 3 October 1932) was a German astronomer and a pioneer in the field of astrophotography. He was the chairman of astronomy at the University of Heidelberg and director of the Heidelberg-K� ...

at the Heidelberg-Königstuhl State Observatory on 25 February 1917. The X-type asteroid has a short

rotation period The rotation period of a celestial object (e.g., star, gas giant, planet, moon, asteroid) may refer to its sidereal rotation period, i.e. the time that the object takes to complete a single revolution around its axis of rotation relative to the ...

of 5.8 hours. It was named after "Fatme", a character in the opera '' Abu Hassan'' by Carl Maria von Weber (1786–1826).

Orbit and classification

''Fatme'' is a non- family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. It orbits the Sun in the outer asteroid belt at a distance of 3.0–3.3 AU once every 5 years and 6 months (2,017 days;

semi-major axis In geometry, the major axis of an ellipse is its longest diameter: a line segment that runs through the center and both foci, with ends at the two most widely separated points of the perimeter. The semi-major axis (major semiaxis) is the long ...

of 3.12 AU). Its orbit has an eccentricity of 0.05 and an inclination of 9 ° with respect to the ecliptic. The body's observation arc begins at Heidelberg Observatory on 16 March 1917, or three weeks after its official discovery observation.

Naming

This minor planet was named after Fatme, a character in the opera '' Abu Hassan'' by German composer Carl Maria von Weber (1786–1826). The official was also mentioned in '' The Names of the Minor Planets'' by Paul Herget in 1955 (). Another asteroid 865 Zubaida, was also named after a character of this opera. The composer himself was honored with the naming of 4152 Weber.

Physical characteristics

In the Bus–Binzel SMASS classification, ''Fatme'' is an X-type asteroid.

Rotation period

In June 2018, a rotational lightcurve of ''Fatme'' was obtained from 5 nights of photometric observations by

Tom Polakis Tom or TOM may refer to: * Tom (given name), a diminutive of Thomas or Tomás or an independent Aramaic given name (and a list of people with the name) Characters * Tom Anderson, a character in ''Beavis and Butt-Head'' * Tom Beck, a character ...

at the Command Module Observatory in Arizona. Lightcurve analysis gave a

of hours with a brightness variation of magnitude (). The result supersedes previously reported period determinations of hours with an amplitude of magnitude by Robert Stephens at the Santana Observatory , California, in May 2001 (), hours with an amplitude of magnitude (tentative) by French amateur astronomer Laurent Bernasconi in December 2004 (), hours with an amplitude of magnitude (tentative) by French amateur astronomer René Roy in May 2012 (), and hours with an amplitude of magnitude by the Spanish group of asteroid observers, OBAS, in January 2016 ().

Diameter and albedo

According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), the Japanese Akari satellite, and the Infrared Astronomical Satellite IRAS, ''Fatme'' measures (), () and () kilometers in diameter and its surface has an albedo of (), () and (), respectively. The ''Collaborative Asteroid Lightcurve Link'' derives an albedo of 0.0361 and a diameter of 88.11 kilometers based on an absolute magnitude of 9.5. Alternative mean-diameter measurements published by the WISE team include (), () and () with corresponding albedos of (), () and ().

References

External links

Lightcurve Database Query
(LCDB), at ''www.minorplanet.info''
Dictionary of Minor Planet Names
Google books

– '' Geneva Observatory'', Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (1)-(5000)
– Minor Planet Center * * {{DEFAULTSORT:Fatme 000866 Discoveries by Max Wolf Named minor planets 000866 19170225