DIAMETER v ABSOLUTE MAGNITUDE
The graph below shows the relationship between Absolute Magnitude
(H, x-axis) and Diameter in metres (D, y-axis) for asteroids with alb-
eidos of 0.05, 0.15, 0.25 and 0.35.
In practice asteroid albeidos vary widely, from 0.02 to 0.5, but 0.15 is
often used as a very approximate guide.