Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 15, Problem 20Q
To determine
The diameter of the other members of the binary asteroid, when one of the members is 16 times brighter than the other and the larger member has a diamater of
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The Near Earth Asteroid Rendezvous (NEAR), after traveling 2.1 billion kmkm, is meant to orbit the asteroid Eros at a height of about 15 kmkm. Eros is roughly 40km×km× 6km×km×6kmkm. Assume Eros has a density (mass/volume) of about 2.3×103kg/m32.3×103kg/m3.
Part A
What will be the period of NEAR as it orbits Eros?
Suppose an asteroid has a semimajor axis of 4 AU. How long does it take the asteroid to go around the Sun? (a) 2 years (b) 4 years (c) 6 years (d) 8 years
The condensation sequence predicts that asteroids consisting of carbonaceous material would form
a.
in the inner solar system where it is warmer.
b.
at random locations then migrating to the outer asteroid belt due to the gravitational influence of Jupiter and Saturn.
c.
in the outer solar system where it is very cold.
d.
between the orbits of Jupiter and Saturn.
e.
in the outer asteroid belt where it is cooler.
Chapter 15 Solutions
Universe
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- How would studying the chemical composition of only the largest, brightest, and most easily observed asteroids yield potentially misleading information about asteroids in general? Why is this called a selection effect?arrow_forwardIf a single asteroid 1 km in diameter were to be fragmented into meteoroids 1 m in diameter, how many would it yield? (Hint: The volume of a sphere 43r3 )arrow_forwardWhat is the difference between a meteoroid and an asteroid? Is there a sharp distinction?arrow_forward
- The mass of the asteroids is found mostly in the larger asteroids, so to estimate the total mass we need to consider only the larger objects. Suppose the three largest asteroids-Ceres (1000 km in diameter), Pallas (500 km in diameter), and Vesta (500 km in diameter)-account for half the total mass. Assume that each of these three asteroids has a density of 3 g/cm3 and calculate their total mass. Multiply your result by 2 to obtain an estimate for the mass of the total asteroid belt. How does this compare with the mass of the Oort cloud?arrow_forwardWhat is the asteroid's orbital radius? What is the asteroid's orbital speed?arrow_forwardIf a trillion (1012) asteroids, each 9 km in diameter, were assembled into one spherical body, how large (in km) would it be? (Note: The volume of a sphere = 4 3 ?r3.) km Compare that body's size to the size of Earth given in its celestial profile. d dEarth =arrow_forward
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