What is the angle of the right ascension?

Angle between ascending node and perigee

Angle between the orbital and equatorial plane

Angle between the perigee and satellite in orbital plane

Angle between vernal equinox and ascending node on equatorial plane

Correct Answer : Angle between vernal equinox and ascending node on equatorial plane

Explanation : Right ascension is the angle formed between the vernal equinox vector to the ascending node on the equatorial plane. Angle between ascending node and perigee is known as Argument of perigee, angle between the orbital and equatorial plane is called Inclination and finally the perigee and satellite in orbital plane’s angle is known as True anomaly.

Recently Updated in Spaceflight Mechanics Questions

How many rotations are required to transform the ECI coordinate system to the perifocal system?

Correct Answer : Option (D) : 3

Explanation : The coordinate transformation from XYZ frame to X’Y’Z’ frame is carried out by a single rotation about one axis. The other two axes remain in the same plane. But to transform from the ECI coordinate system to the perifocal system, there have to be successive 3 rotations. The first rotation is about Z axis, second is through X’ axis and the final rotation is bout Z’’ axis.