Note how OSIRIS REx was speeding away from Earth at high speed last September inside Earth's orbit around the Sun and how ISIRIS REx is now slowing down (!) in its strange orbit (trajectory!) now outside the Earth that is catching up from behind at constant speed. Earth and spacecraft OSIRIS REx will meet again in September. It is really MAGIC!
More proof from Heiwa that he doesn't understand orbital mechanics.
Well - let's test your understanding of orbital mechanics or dynamics. It seems planet Earth orbits the Sun at almost constant speed in an almost cirkel -
green in the figure above. The 360° orbit Earth takes a year. The Sun is the
yellow spot in the middle.
Spacecraft OSIRIS REx was launched from Earth orbiting the Sun on 8 September 2016 into an ellpitical or hyperbolic (!) orbit around the Sun -
red in the figure above.
The Atlas V rocket launched OSIRIS-REx with a hyperbolic escape velocity (!) of 5.4 km/s (over 12,000 mph). In space, OSIRIS-REx performs a series of Deep Space Maneuvers (DSM), changing velocity by another 0.52 km/s (1,163 mph).
See -
http://www.asteroidmission.org/mission/#cruiseAfter a year and two weeks orbiting (!) the sun, OSIRIS-REx will make a flyby of Earth. Earth's gravitational field will pull the spacecraft towards the planet Earth where it can "borrow" a small amount of Earth's orbital energy. This additional energy is used to increase OSIRIS-REx's orbital inclination and sling it back into space for a rendezvous with Bennu.
The flyby will take place September 22, 2017 and the spacecraft will reach Bennu November 2018. Bennu is an asteroid orbiting around the Sun in the
blue elliptical orbit inclined to the Earth orbit.
Now, what kind of trajectory is OSIRIS REx doing? It took off from Earth heading towards the Sun on 8 September 2016 leaving Earth behind in a hyperbolic orbit inside Earth's orbit. What is a hyperbolic orbit? Ever heard of one? What is OSIRIS REx orbiting around? The Sun?
1 May 2017 OSIRIS REx is still far ahead of planet Earth - actually 5.91 light minutes - outside Earth's orbit but now Earth is getting closer every day. OSIRIS REx will collide with Earth September 22, 2017.
But NO! There will only be a flyby.
Anyway - to show that you are clever - what was/is the OSIRIS REx speeds (relative Sun and Earth) the first of every month since launch until flyby? It is basic orbital dynamics!