A comet has a very elliptical orbit with a period of 137.6 y. If the closest approach of the comet to the Sun is 0.09 AU, what is its greatest distance from the Sun

Respuesta :

Answer:

53.35 AU

Explanation:

Using Kelper's third law

The relation between  the time period (T) and the semi-major axis  of the comet can be expressed as:

T²∝a³

T² = Ka³

where;

(a) = length of the semi-major axis

Making (a) the subject of the axis

a³ [tex]=\frac{T^2}{K}[/tex]

[tex]a = \sqrt[3]{\frac{T^2}{K} }[/tex]

[tex]a = \sqrt[3]{\frac{((137.6y)(\frac{3.16*10^7sec}{1year})^2}{2.96*10^{-19}s^2/m^3} }[/tex]

[tex]a =(3.997*10^{12}m)(\frac{1AU}{149597870700m} )[/tex]

a = 26.72 AU

Finally, the greatest distance from the Sun is:

[tex]d = 2a -[/tex] [tex]d_{approach}[/tex]

d = 2(26.72) - 0.09

d =53.44 - 0.09

d = 53.35 AU

Thus, the greatest distance from the Sun = 53.35 AU