* Asteroids are rocky, irregularly shaped bodies that orbit the Sun, mainly found in the asteroid belt between Mars and Jupiter. They are typically smaller than planets, ranging in size from a few meters to hundreds of kilometers.
* Sedna is a trans-Neptunian object (TNO), meaning it orbits the Sun beyond Neptune. These objects are much further out than the asteroid belt, residing in the Kuiper Belt and beyond. Sedna is significantly larger than most asteroids, with a diameter estimated at around 995 kilometers.
Here's a table summarizing the key differences:
| Feature | Asteroid | Sedna |
|---|---|---|
| Location | Asteroid Belt (between Mars and Jupiter) | Kuiper Belt and beyond |
| Size | Smaller (meters to hundreds of kilometers) | Larger (around 995 kilometers) |
| Composition | Rocky | Likely rocky with a possible icy mantle |
| Orbit | Typically more circular | Highly elliptical, taking hundreds of years to orbit the Sun |
In essence, while both are celestial bodies orbiting the Sun, Sedna is a much larger and more distant object than most asteroids.
