Question

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The Cygnus OA-7 Mission was launched on April 18, 2017 to the International Space Station (ISS)...

The Cygnus OA-7 Mission was launched on April 18, 2017 to the International Space Station (ISS) to deliver supplies. The ISS is at a 409 altitude circular orbit. The resupply spacecraft performed the following mission (not exactly but good for this problem):

- launched into a 210 by 298 km altitude elliptical orbit and completed 1 orbit.

- performed a Hohmann transfer from the apoapsis of the insertion orbit to the 409 km altitude ISS orbit

- circularized at the 409 km altitude

- μ of Earth is 398600 km3/sec2 and radius of Earth is 6378.0 km.

Compute the DV required to circularize at the final ISS altitude.   

a. DV = 31.65765998 m/sec

b. DV = 76.65765998 m/sec

c. DV = 78.65765998 m/sec

d. DV = 44.65765998 m/sec

Solutions

Expert Solution

total amount of change in velocity = 63.3 m/s

Amount of Change in velocity to circularize the ISS orbit = 63.3/2 = 31.65 ms

So the answer is option (a)

genius_generous answered 2 years ago
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