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Hayabusa had performed the ion engine cruise by December 27th, when it stopped the
propulsion until January 1st in order that the precise orbit determination was to be
conducted. The task designated as Orbit Determination was participated not only by JAXA
antenna but also by NASA Deep Space Network (DSN) antenna which provided
the Delta-VLBI (Very Long Baseline Interferometry) measurements gathering the accurate
information as to position and velocity of the spacecraft.
On January 1st, Hayabusa successfully restarted its ion engine again in a new combined
mode that was established last November.
The distance to the Hayabusa from Earth has now been lower than 0.5 AU,
and next week, the project team is sure to state that the Hayabusa is on a return path
coming into the sphere of Earth's gravity.


Fig.1: Closest distance to Earth when Hayabusa flies ballistically from the moment designated.

Fig.2: The plane is normal to the approach velocity to Earth, and the horizontal axis corresponds to a crossing line with the equatorial plane. Sun is in the left hand side. Plots show the points where Hayabusa flies through this plane.

Fig.3: Trajectories relative to Earth in inertial frame. The plane corresponds to the ecliptic plane.

Notes: Dates designated in the left figure do not indicate the return dates.

 

Hayabusa completed the correction TCM-2
Jun 8, 2010 Up!!

Hayabusa completed the correction TCM-2
Jun 1, 2010 Up!!

Hayabusa Caotured its Home Earth
May 17, 2010 Up!!

Hayabusa completed the correction TCM-1
May 10, 2010 Up!!

Hayabusa successfully completed its initial correction(TCM-0)
May 6, 2010 Up!!

Hayabusa about to enter into Earth's gravity sphere
Apr121, 2010 Up!!

Hayabusa about to enter into Earth's gravity sphere
Apr 1, 2010 Up!!

Hayabusa traversed over south pole and will fly-by at night side of Earth
Mar 26, 2010 Up!!

Hayabusa will skim the geosynchronous orbit
Mar 23, 2010 Up!!

Hayabusa now at the Final Guidance Phase
Mar 12, 2010 Up!!

Hayabusa, passes within half of the Moon's distance
Mar 8, 2010 Up!!

Hayabusa, now will pass within Moon's distance
Feb 26, 2010 Up!!

Hayabusa is skimming the Moon
Feb 18, 2010 Up!!

Hayabusa, Right on the Course
Feb 15, 2010 Up!!

Hayabusa will will pass at two times as far distance as to the Moon
Feb 9, 2010 Up!!

Hayabusa will approach within 1 million km from Earth
Feb 1, 2010 Up!!

Hayabusa Approach in Order with Two More Months of Ion Engines Burn Left
Jan 21, 2010 Up!!

Hayabusa on a path passing through Earth's gravity sphere
Jan 14, 2010 Up!!

Hayabusa about to enter into Earth's gravity sphere
Jan 8, 2010 Up!!

Hayabusa about to enter into Earth's gravity sphere
Jan 4, 2010 Up!!

more detail

 
 
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