Unfortunately, not many. We can accurately measure its location and orbit, by watching the object for several months or years. We can make a good guess of its size, based on the brightness, since we know the distance pretty accurately. We can calculate the composition of the surface based on the spectrum of light that we see.
A couple of things that are very difficult to determine from here are the mass and density of the object. We can calculate these very accurately if the asteroid has a satellite, or if we send a space probe there to orbit the object. We've done that only for a very few asteroids.
No, an asteroid cannot destroy earth, but a large enough asteroid can have devastating effects on the life on Earth
No, if the Earth was destroyed by an asteroid we would not be living today.
Yes, the asteroid belt starts properly after the orbit of Mars.
What asteroid? There were several.
Theory suggests that it is a remnant of a large asteroid that struck the Earth
you can measure its distance, size, shape, and composition from the Earth.
- francium is extremely radioactive- the total quantity of francium on the Earth is approx. 30 g- the chemical and physical properties of francium are only estimated, not measured
It doesn't. In an estimated 23 years, a belt of asteroids will collide with the earth.
No, an asteroid cannot destroy earth, but a large enough asteroid can have devastating effects on the life on Earth
A more specific question is required. There are an estimated 700,000 to 1.7 million asteroids more than 1 km in diameter in the asteroid belt between Mars and Jupiter alone. Obviously, their distances from Earth are quite varied.
No, if the Earth was destroyed by an asteroid we would not be living today.
Yes, the asteroid belt starts properly after the orbit of Mars.
Yes, if the asteroid is captured by the Earth's gravitational pull.
What asteroid? There were several.
Probably not. I haven't seen any news about an asteroid about to strike Earth.
Theory suggests that it is a remnant of a large asteroid that struck the Earth
Well there characteristics you can see with your eye.