Samiksha Jaiswal (Editor)

1009 Sirene

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Discovered by  K. Reinmuth
MPC designation  1009 Sirene
Minor planet category  Mars-crosser
Discovered  31 October 1923
Discoverer  Karl Wilhelm Reinmuth
Asteroid group  Mars-crosser asteroid
Discovery date  31 October 1923
Alternative names  1923 PE
Observation arc  91.64 yr (33473 days)
Orbits  Sun
Named after  Siren
Discovery site  Landessternwarte Heidelberg-Königstuhl
Similar  1056 Azalea, 1002 Olbersia, 132 Aethra, 114 Kassandra, 1001 Gaussia

1009 Sirene is a Mars-crosser asteroid. It was discovered by Karl Wilhelm Reinmuth on October 31, 1923, and observed for 4 months. Its provisional designation was 1923 PE and it was named after the mythological Sirens. It became a lost asteroid until it was recovered in 1982 from exposures on the 48-inch (120 cm) Schmidt at Palomar Observatory.

Sirene's semi-major axis is 2.62 AU, well beyond that of Mars, but its highly eccentric orbit crosses Mars', allowing close approaches of the planet. On 8 June 1949 the asteroid passed 0.049 AU (7,300,000 km; 4,600,000 mi) from Mars. With an absolute magnitude of 13.9, the asteroid is about 5–10 km in diameter.


1009 Sirene Wikipedia