1009 Sirene
From Infogalactic: the planetary knowledge core
| Discovery [1][2] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. (024) |
| Discovery date | 31 October 1923 |
| Designations | |
| MPC designation | 1009 Sirene |
|
Named after
|
Siren (mythology)[3] |
| 1923 PE | |
| Mars-crosser | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 91.64 yr (33,473 days) |
| Aphelion | 3.8199 AU |
| Perihelion | 1.4248 AU |
| 2.6223 AU | |
| Eccentricity | 0.4566 |
| 4.25 yr (1551.1 days) | |
| 185.84° | |
| Inclination | 15.778° |
| 229.46° | |
| 186.38° | |
| Earth MOID | 0.4376 AU |
| Physical characteristics | |
| 5–10 km[4] | |
| 13.9 | |
1009 Sirene is a Mars-crosser asteroid. It was discovered by Karl Wilhelm Reinmuth on October 31, 1923, and observed for 4 months.[2] 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.[5]
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,[1] the asteroid is about 5–10 km in diameter.[4]
References
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- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
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External links
- Dictionary of Minor Planet Names, Google books
- 1009 Sirene at the JPL Small-Body Database
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