4:00 PM ET on Apr 13, 2017. The stock information provided is for informational purposes only and is not intended for trading purposes. The stock information is provided by eSignal, stock charts are provided by EDGAR Online, both third party services, and CenterPoint Energy, Inc. does not maintain or provide information directly to this service. Stock information is delayed approximately 20 minutes.
Asteroids can reach as large as Ceres, which is 940 km (about 583 miles) across. On the other hand, one of the smallest, discovered in 1991 and named 1991 BA, is only about 20 feet (6 meters) across. Nearly all asteroids are irregularly shaped, although a few are nearly spherical, such as Ceres.
(a) Compare the total mass of these asteroids to the mass of Earth. (b) Assuming a spherical shape and a density of rho, estimate the diameter of an asteroid ANSWER: The total mass of all asteroids would be 20,000 ï´ï 10 17 21kg = 2 ï´ï 10 kg.s we see them today, the asteroids would not make up much of a planet! A single body would have the following size. Use the formula for density: 317 (4/3)5103000 ï½ R = 20,000 m or 20 km, so the diameter would be 40 km.