Japan’s space agency Sunday successfully launched its new flagship H3 rocket carrying an unmanned cargo spacecraft for its first mission to deliver supplies to the International Space Station.

The Japan Aerospace Exploration Agency said the HTV-X1 spacecraft successfully lifted off atop the No. 7 H3 rocket from Japan’s Tanegashima Space Center in southern Japan.

The spacecraft was separated and placed into a planned orbit, JAXA said. If everything goes smoothly, it is expected to arrive at the ISS in a few days to deliver supplies. Japanese astronaut Kimiya Yui, currently at the ISS, is set to catch the craft with a robot arm in the early hours of Thursday.

The HTV-X is the successor to JAXA’s unmanned H-II Transfer Vehicle known as Kounotori, or stork in Japanese, which flew nine missi

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