|Pluto Mission||Comets||Kuiper Belt||Solar System||Asteroids|
Asteroids are categorized by where they appear in the Solar System:
Asteroid Belt: This is the main belt located between Mars and Jupiter.
They are sub-divided into: -
Near Earth Asteroids (NEA): They travel close to Earth: -
Trojans: These are located near Lagrange point in Jupiter. It has been observed and recorded that there are several hundred asteroids and may be more than a thousand unknown in the Trojan category. A few smaller ones are seen in the Lagrange points of Earth and Venus in the Trojan category.
There are a few asteroids found in the outer solar system known as Centaurs.
There are several types of asteroids categorized mainly conforming to their Spectra (an ordered array of the components of emission or wave) and Reflective Power (albedo).
í M – Type: They are bright. (Reflective Power 0.10 – 0.18). Chemical Composition – pure nickel-iron.
í S – Type: They are, compared to ‘C’ types, relatively bright. (Reflective Power 0.10 – 0.22). Chemical Composition – a mixture of iron silicates, magnesium with metallic nickel-iron.
í C – Type: A vast majority of asteroids belong to this type. Very dark (Reflective Power 0.03).
í Rare Type: It has been found that there are about 10 to 15 very rare types as well.
A number of Asteroids are visible only through Binoculars or small telescopes.
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