Circular orbit plane change (1)

Your spacecraft is on an equatorial circular orbit (EO) around a spherical planet at 1 k m / s 1\ \mathrm{km/s} relative to the center of the planet. You want to get to a polar orbit of same radius (PO, forming an angle of π / 2 \pi/2 with the EO), yet the basic maneuver consisting of thrusting normally until you reach a polar orbit isn't the most efficient. For information, its required Δ v \Delta v is 1.414 k m / s 1.414\ \mathrm{km/s} .

Instead, you're going for a bi-elliptical transfer . Your flight plan is the following:

  • Maneuver 1: Transfer from the EO to an equatorial transfer orbit .
  • Maneuver 2: Plane change at apogee, now on a polar transfer orbit .
  • Maneuver 3: Slowing down at perigee to reach the PO .

According to this procedure, what is the theoretical minimum Δ v \Delta v required ( ( in k m / s ) ? \mathrm{km/s})?


The answer is 0.82842712474.

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