The exposure occurred during 15:10 - 15:15UTC on September 3rd, 2005, when
Hayabusa completed its first half of deceleration maneuvers. The field of view of
each picture above is 11.4 by 16.3 arc minutes. The vertical axis approximately
coincides with the north direction of the ecliptic plane.
Hayabusa carries the AMICA instrument that uses the Optical Navigation Camera
sensor-head with the Filter Wheel consisting seven bands filters as well as one
wide-band filter. What filter was used is annotated at lower-right in each picture.
They are ul (380nm), b (420nm), v (540nm), w (700nm), x (860nm), p (940nm),
zs (1,000nm) bands respectively.
Hayabusa will perform the calibration observation using standard stars and plans to
conclude Itokawafs spectral results soon.
In addition to AMICA, Hayabusa performed its on-orbit health check of its Laser
Altimeter (LIDAR) aboard, which detects the distance to Itokawa in order to trigger
stop maneuver, when Hayabusa reaches the Gate Position box located 20 kilometers
toward the Earth. The laser transmission test was successful.
Hayabusa, on September 7th morning, is about 350 kilometers from Itokawa with
the approach speed of still 7 kilometers per hour. Hayabusa will reach Itokawa
almost one week ahead.