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Nysa family
From Wikipedia, the free encyclopedia
(Redirected from Polana family)
The Nysa asteroids (also known as the Hertha family or the Polana family) are a group of asteroids in the Main Belt orbiting the sun between 2.41 and 2.5 AU. Asteroids in this family have eccentricities between 0.12 and 0.21 and inclinations of 1.4 to 4.3.[1] The family derives it's name from its most massive member, 44 Nysa.
Asteroids in the Nysa family are typically divided into two, mineralogically different subgroups: Nysa and Polana. Aside from 44 Nysa and 135 Hertha, asteroids in the Nysa subgroup are S-type asteroids. Asteroids in the Polana subgroup, like 142 Polana, are F-type asteroids. [2]
| Name | a | e | i |
|---|---|---|---|
| 44 Nysa | 2.423 | 0.149 | 3.703° |
| 135 Hertha | 2.428 | 0.206 | 2.306° |
| 750 Oskar | 2.444 | 0.130 | 3.952° |
| 2984 Chaucer | 2.470 | 0.135 | 3.054° |
| 142 Polana | 2.418 | 0.136 | 2.238° |
| 3467 Bernheim | 2.409 | 0.149 | 4.112° |
- ^ http://www.easysky.de/eng/screenshots/index.htm
- ^ http://www.aas.org/publications/baas/v30n3/dps98/16.htm
- ^ http://ssd.jpl.nasa.gov/sbdb.cgi
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| Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Neptune Trojans · Comets · Trans-Neptunians (Kuiper belt • Scattered disc objects • Oort cloud) |
| For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons, meteoroids and the Solar System. For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names. |
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