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5535 Annefrank

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Discovered by  K. Reinmuth
MPC designation  5535 Annefrank
Discovered  23 March 1942
Discoverer  Karl Wilhelm Reinmuth
Asteroid family  Augusta family
Discovery date  23 March 1942
Observation arc  26726 days (73.17 yr)
Orbits  Sun
Named after  Anne Frank
5535 Annefrank Jack39s Celestia Addons
Alternative names  1942 EM · 1978 EK6 1986 TV14 · 1991 BO2
Minor planet category  main-belt · Augusta family
Discovery site  Heidelberg-Königstuhl State Observatory
Similar  9969 Braille, Solar System, 253 Mathilde, 4769 Castalia, Sun

5535 Annefrank /ˌæn ˈfræŋk/ is an inner main-belt asteroid, and member of the Augusta family. It was discovered by Karl Reinmuth at Heidelberg State Observatory in 1942. In 1995 it was named after Anne Frank, the Dutch-Jewish diarist who died in a Nazi concentration camp (World War II). The asteroid was used as a target to practice the flyby technique that the Stardust space probe would later use on the comet Wild 2.

Contents

5535 Annefrank Jack39s Celestia Addons

Orbit

Annefrank orbits among the main-belt asteroids, with its shortest axis aligned roughly normal to its orbital plane.

Physical characteristics

5535 Annefrank The Physics of the Death Star Starts With A Bang Medium

On November 2, 2002, the Stardust space probe flew past Annefrank at a distance of 3079 km. Its images show the asteroid to be 6.6 × 5.0 × 3.4 km, twice as big as previously thought, shaped like a triangular prism, with several visible impact craters. From the photographs, the albedo of Annefrank was computed to be between 0.18 and 0.24. Preliminary analysis of the Stardust imagery suggests that Annefrank may be a contact binary, although other possible explanations exist for its observed shape.

Later ground based lightcurve data was used in an attempt to measure Annefrank's rotational period. Their data resulted in possible rotational periods of 0.5, 0.63 or 0.95 days, with 0.63 days fitting the data best. The lightcurve data also suggests that the asteroid is not Lambertian, meaning that surface features, such as shadows from boulders and craters, play a role in the object's perceived brightness and not just the asteroid's relative size when seen from that orientation.

5535 Annefrank httpsuploadwikimediaorgwikipediacommonsthu


5535 Annefrank Stardust 5535 Annefrank Flyby

References

5535 Annefrank Wikipedia


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