|Mission duration||2 hours|
|Launch mass||865 kilograms (1,907 lb)|
|Landing mass||761 kilograms (1,678 lb)|
|Start of mission|
|Launch date||3 February 1994, 22:20UTC|
|Launch site||Tanegashima Yoshinobu 1|
|End of mission|
|Landing date||4 February 1994, 00:30UTC|
|Landing site||Pacific Ocean|
|Perigee||448 kilometres (278 mi)|
|Apogee||458 kilometres (285 mi)|
|Epoch||3 February 1994|
OREX (Orbital Re-entry Experiment) was a NASDA re-entry demonstrator prototype which was launched in 1994 on the H-II launcher; the satellite was renamed Ryūsei (りゅうせい Shooting star?). It was a precursor for the Japanese space Shuttle Hope.
OREX tested various communications systems, heating profiles and heat shielding components for Hope.
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