In 2014, a space probe approached the rocky core of the comet Churyumov-Gerasimenko, which is only a few km in diameter. The probe then entered the orbit around the comet at a distance of 30 km. The comet was found to have a mass of 1.0Γ—1013kg.
What is the orbital period of the probe around the comet, in days?

Relax

Respuesta :

Answer:

738.39 days.

Explanation:

To find the orbital period

T of the probe around the comet, we can use Kepler's third law of planetary motion, which relates the orbital period of a celestial body to its distance from the body it is orbiting and the mass of the body being orbited.

Kepler's third law can be expressed as:

2

=

4

2

β‹…

β‹…

3

T

2

=

Gβ‹…M

4Ο€

2

​

β‹…r

3

Where:

T is the orbital period (in seconds)

G is the gravitational constant (

6.674

Γ—

1

0

βˆ’

11

 

m

3

/

kg

β‹…

s

2

6.674Γ—10

βˆ’11

m

3

/kgβ‹…s

2

)

M is the mass of the comet (

1.0

Γ—

1

0

13

 

kg

1.0Γ—10

13

kg)

r is the distance between the probe and the center of the comet (

30

 

km

=

30

,

000

 

m

30km=30,000m)

First, let's convert the distance from kilometers to meters:

=

30

,

000

 

m

r=30,000m

Now, we can plug the values into the equation:

2

=

4

2

(

6.674

Γ—

1

0

βˆ’

11

 

m

3

/

kg

β‹…

s

2

)

β‹…

(

1.0

Γ—

1

0

13

 

kg

)

β‹…

(

30

,

000

 

m

)

3

T

2

=

(6.674Γ—10

βˆ’11

m

3

/kgβ‹…s

2

)β‹…(1.0Γ—10

13

kg)

4Ο€

2

​

β‹…(30,000m)

3

2

=

4

2

6.674

Γ—

1

0

βˆ’

11

β‹…

1.0

Γ—

1

0

13

β‹…

(

27

Γ—

1

0

9

)

T

2

=

6.674Γ—10

βˆ’11

β‹…1.0Γ—10

13

4Ο€

2

​

β‹…(27Γ—10

9

)

2

=

4

2

β‹…

27

Γ—

1

0

9

6.674

Γ—

1

0

2

T

2

=

6.674Γ—10

2

4Ο€

2

β‹…27Γ—10

9

​

2

β‰ˆ

4.0732

Γ—

1

0

14

T

2

β‰ˆ4.0732Γ—10

14

Now, take the square root of both sides to find

T:

β‰ˆ

4.0732

Γ—

1

0

14

Tβ‰ˆ

4.0732Γ—10

14

​

β‰ˆ

6.3832

Γ—

1

0

7

 

seconds

Tβ‰ˆ6.3832Γ—10

7

seconds

Now, let's convert the orbital period from seconds to days:

days

=

seconds

86400

T

days

​

=

86400

T

seconds

​

​

days

=

6.3832

Γ—

1

0

7

86400

T

days

​

=

86400

6.3832Γ—10

7

​

days

β‰ˆ

738.39

 

days

T

days

​

β‰ˆ738.39days

So, the orbital period of the probe around the comet is approximately 738.39 days.