Question

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 orbit velocity at the apoapsis of the initial launch insertion orbit.

a. 7.7013 km/sec

b. 7.3678 km/sec

c. 7.9587 km/sec

d. 7.6318 km/sec

Answer 1