準惑星
Sedna
Distant body in the outer Solar System
現在 · 時点
Sednaと地球の距離は？
123億 km (82 AU)
その光が地球に届くまで 11時間21分。
太陽から 124億 km (82.8 AU)。
3D で見る数字で見る
- 半径
- 500 km
- 太陽から
- 124億 km (82.8 AU)
位置と軌道：JPL Horizons
Sedna (dwarf planet)
Sedna is a dwarf planet in the outermost reaches of the Solar System, orbiting the Sun far beyond the orbit of Neptune. It was discovered in 2003, and is roughly 1,000 km in diameter. Spectroscopic analysis has revealed its surface to be a mixture of the solid ices of water, carbon dioxide, and ethane, along with sedimentary deposits of methane-derived, reddish-colored tholins, a chemical makeup similar to the surfac…
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