Apollo-planetoïden

De Apollo-planetoïden zijn een groep planetoïden genoemd naar de eerst ontdekte Apollo-planetoïde: (1862) Apollo. De banen van de Apollo-planetoïden kruisen de aardbaan: ze hebben een elliptische omloopbaan waarvan de halve hoofdas groter is dan deze van de aarde. Sommige kunnen zeer dicht tegen de aarde komen, waardoor ze een potentieel gevaar vormen voor de aarde (zie aardscheerder). Hoe dichter de waarde van de halve hoofdas van de planetoïde de waarde van de halve hoofdas van de aarde is, hoe kleiner de excentriciteit van de omloopbanen moet zijn om te kruisen. Waarschijnlijk stortte op 15 februari 2013 een 17 meter grote planetoïde uit de Apollo-groep neer in de Russische stad Tsjeljabinsk.[1]

De grootst bekende Apollo-planetoïde is (1866) Sisyphus, met een diameter van ongeveer 8,5 kilometer. De lijst van de Apollo-planetoïden wordt continu bijgehouden. Zie externe link Apollo-planetoïden. Op 4 december 2004 waren 1487 Apollo-planetoïden bekend.

Enkele Apollo-planetoïden

Naam Jaar Ontdekt door
2014 JO25 2014 Catalina Sky Survey
2013 TX68 2013 Catalina Sky Survey
2004 AS1 2004 LINEAR project
1998 KY26 1998 Spacewatch
1997 XR2 1997 LINEAR project
(69230) Hermes 1937 Karl Reinmuth
(53319) 1999 JM8 1999 LINEAR project
(52760) 1998 ML14 1998 LINEAR project
(35396) 1997 XF11 1997 Spacewatch
(29075) 1950 DA 1950 Carl A. Wirtanen
(25143) Itokawa 1998 LINEAR project
(6489) Golevka 1991 Eleanor F. Helin
(4769) Castalia 1989 Eleanor F. Helin
(4660) Nereus 1982 Eleanor F. Helin
(4581) Asclepius 1989 Henry E. Holt, Norman G. Thomas
(4486) Mithra 1987 Eric Walter Elst, Vladimir Shkodrov
(4197) 1982 TA 1982 Eleanor F. Helin, Eugene Shoemaker
(4183) Cuno 1959 Cuno Hoffmeister
(4179) Toutatis 1989 Christian Pollas
(4015) Wilson-Harrington 1979 Eleanor F. Helin
(3200) Phaethon 1983 Simon Green, John K. Davies / IRAS
(2101) Adonis 1936 Eugène Joseph Delporte
(2063) Bacchus 1977 Charles T. Kowal
(1866) Sisyphus 1972 Paul Wild
(1862) Apollo 1932 Karl Reinmuth
(1685) Toro 1948 Carl A. Wirtanen
(1620) Geographos 1951 Albert George Wilson, Rudolph Minkowski
(1566) Icarus 1949 Walter Baade

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