original: It is an F-type asteroid, which means that it is very dark in colouring (darker than soot) with a carbonaceous composition.
simplifications: It is a very dark F-type asteroid made of carbon. It's an F-type asteroid, which means that it's darker than soot and made of carbon. An F-type asteroid is a dark color. The structure is carbonaceous. It is an F-type asteroid. This means it is very dark coloured (darker than soot) with a carbonaceous composition. It is an F-type asteroid.  This means it's coloring is extremely dark and it has a carbonaceous composition. It is an F-type asteroid. That means  it is very dark in colouring. It is darker than soot. It has a carbonaceous composition. It is an F-type asteroid. This means it is very dark in color with a carbon-like composition. F-type asteroids are very dark in color with a carbon make-up. It is an F-type asteroid, which means that it is very dark in coloring (darker than soot) with a carbonaceous composition. It is an F-type asteroid, which means that it is very dark in color and rich in carbon.