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Hayabusa2 Earth Swing-by Result
by Staff Writers
Tokyo, Japan (SPX) Dec 15, 2015

This shot was taken at 09 p.m. on Dec. 4 (Japan Standard Time), about 340,000 km from the center of the Earth. You can see the Australian continent on the upper right, and Antarctica on the lower right.

The Japan Aerospace Exploration Agency (JAXA) confirmed that the Asteroid Explorer "Hayabusa2" is cruising on its target orbit after measuring and calculating the post-Earth-swing-by orbit.

The Hayabusa2 performed the Earth swing-by on the night of December 3 (Thu.), 2015 (Japan Standard Time).

The Hayabusa2 flew closest to the Earth at 7:08 p.m. (JST) and passed over the Pacific Ocean near the Hawaii islands at an altitude of about 3,090 km.

With the swing-by, the explorer's orbit turned by about 80 degrees and its speed increased by about 1.6 km per second to about 31.9 km per second (against the Sun) thus the orbit achieved the target numbers.

According to the operation supported by the NASA Deep Space Network stations and European Space Agency deep space ground station, the Hayabusa2 is in good health.

Message from Project Manager Yuichi Tsuda: "I would like to express my deep gratitude to all pertinent parties and people and those who are supporting our operation.

All the Hayabusa2 project team members have been working together and will continue our challenging voyage. The Hayabusa2 gained orbit energy through the swing-by to leave the Earth. The target is the asteroid 'Ryugu.' 'See you later, people on Earth!'"

As of 0:00 a.m. on Dec. 14, 2015, the Hayabusa2 is flying at about 4.15 million km from the Earth, and about 144.85 million km from the Sun. Its cruising speed is 32.31 km per second (against the Sun).

The Hayabusa2 is increasing its speed under the influence of the Sun's gravity after the swing-by.

After the swing-by, the Hayabusa2 took images of the Earth using its onboard Optical Navigation Camera - Telescopic (ONC-T). The ONC-T can shoot color images using seven filters.

The accompanying image is composed by using three of these filters. You can see the Australian continent and Antarctica in the image.

The South Pole is not lit by the Sun during the summer, and meteorological satellites also do not cover the Antarctic area to take its images, hence the shot this time is precious.


Related Links
Japan Aerospace Exploration Agency
Asteroid and Comet Mission News, Science and Technology

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Previous Report
Japan asteroid probe enters 'target orbit' in space quest
Tokyo (AFP) Dec 14, 2015
A Japanese space probe successfully entered "target orbit" and is on its way to rendezvousing with a far away asteroid, in a quest to study the origin of the solar system, authorities said Monday. Earlier this month the unmanned explorer, Hayabusa 2, passed by Earth to harness the planet's gravitational pull in a bid to switch its orbital path to continue toward tiny Ryugu asteroid. "The ... read more

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