OREX

Ryusei
Spacecraft properties
1:1 scale model of OREX and the Vehicle Evaluation Payload within the H-II fairing, at the Kakamigahara Air and Space Museum

Mission type	Technology
Operator	NASDA
COSPAR ID	1994-007A
SATCAT no.	22978
Website	www.jaxa.jp/projects/rockets/orex/index_e.html
Mission duration	2 hours


Manufacturer	NASDA
Launch mass	865 kilograms (1,907 lb)
Landing mass	761 kilograms (1,678 lb)


Start of mission
Launch date	3 February 1994, 22:20 (1994-02-03UTC22:20Z) UTC^[1]
Rocket	H-II
Launch site	Tanegashima Yoshinobu 1


End of mission
Landing date	4 February 1994, 00:30 (1994-02-04UTC00:31Z) UTC^[2]
Landing site	Pacific Ocean


Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee altitude	448 kilometres (278 mi)
Apogee altitude	458 kilometres (285 mi)
Inclination	30.5 degrees
Period	93.64 minutes
Epoch	3 February 1994^[3]

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.

References

^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 9 November 2013.
^ McDowell, Jonathan (7 February 1994). "Issue 183". Jonathan's Space Report. Retrieved 9 November 2013.
^ McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 9 November 2013.

External links

Description of OREX on JAXA web site

Japanese space program

Italics indicates projects in development.
Symbol ^† indicates failed projects.
~~Strikethrough lines~~ indicate cancelled projects.

Space agencies

National space agencies	JAXA former ISAS NAL NASDA NICT JSS
Joint development partners	NASA¹ ESA² ASI³ CSA⁴ Roscosmos⁵ AEB⁶ INPE⁷ ISRO⁸

Astronomical observation

Past	Akari ASCA ASTRO-E^† ~~Astro-G~~ CORSA^† Ginga Hakucho HALCA Hinotori Hitomi^† ~~SPICA~~ Suzaku Tenma Yohkoh
Active	Hinode Hisaki XRISM¹
Future	ATHENA² SOLAR-C¹ GREX-PLUS [ja] HiZ-GUNDAM [ja] LAPYUTA LiteBIRD Nancy Grace Roman Space Telescope¹ Nano-JASMINE Small-JASMINE

Communications satellites, broadcasting satellites and satellite navigation systems

Past	BS 2X 3H 3N Kakehashi Kirari Kizuna Kodama MBSat N-STAR a b Sakura (1 2a 2b 3a 3b) Yuri 1 2a 2b 3a 3b
Active	Kirameki 1 2 Michibiki 1 2 3 4 1R MTSAT N-STAR c d JDRS
Future	DSN 3 QZS 5 6 7

Earth observation

Past	Akebono Daichi 1 3^† Denpa Fuyo-1 Jikiken Kyokko Midori I II Momo 1 1b Ohozora Taiyo TRMM¹ Ume 1 b Geotail¹
Active	Aqua^1,7 Arase ASNARO 1 2 Daichi-2 GPM¹ Himawari Ibuki original 2 Shikisai Shizuku
Future	ALOS-4 EarthCARE² GOSAT-GW PMM

Engineering tests

Past	Ayame 1 2 DASH EXPRESS IKAROS Jindai Kiku 1 2 3 4 5 6 7 8 LDREX 1 2 LRE Micro LabSat-1 Myojo Ohsumi Orizuru RAISE 2 3^† ~~PETSAT~~ RAPIS-1 Ryusei SERVIS-1 SERVIS-2 SDS-1 SFU Shinsei ~~SmartSat-1~~ Tansei 1 2 3 4 Tasuki Tsubame Tsubasa USERS
Active	Ajisai Reimei SDS-4
Future	BEAK ETS-IX G-SATELLITE SERVIS-3

Human spaceflight

Past	~~Fuji crewed spacecraft~~ ~~HOPE-X~~ H-II Transfer Vehicle
Active	International Space Station (ISS) & Japanese Experiment Module (Kibō)^1,2,3,4,5,6
Future	HTV-X Japanese Space Station Module (Mitsui) Lunar Gateway^1,2,4

Space probes

The Moon

Past	Hakuto-R Mission 1^† Hiten ~~Lunar-A~~ Kaguya (SELENE) OMOTENASHI^† ~~SELENE-2~~
Active	EQUULEUS Smart Lander for Investigating Moon (SLIM)
Future	Hakuto-R Mission 2 HERACLES^2,4 Lunar Cruiser Lunar Polar Exploration Mission⁸ (LUPEX) Yaoki

Others

Past	Hayabusa ~~Hayabusa Mk2~~ Nozomi^† PROCYON^† Sakigake Shin'en^† Suisei
Active	Akatsuki BepiColombo (MMO/Mio)² Hayabusa2 Jupiter Icy Moons Explorer²
Future	Comet Interceptor² DESTINY+ Dragonfly¹ Hera² MELOS Martian Moons eXploration Next Generation Small-Body Sample Return TEREX

Reconnaissance satellites

Past	IGS-Optical 1 2 Experimentally 3 IGS-Radar 1 2
Active	IGS-Optical 3 4 5 6 Experimentally 5 IGS-Radar 3 4 Spare 5 6
Future	IGS-Optical 7 8 IGS-Radar 7 8

Private small satellites

Past	CosMoz CUTE 1.7+APD Fuji 1 2 Hayato HIBARI HIT-SAT Kagayaki Kanta-kun (WEOS) Kūkai Maido-1 Negai☆″ Niwaka RAIKO Waseda-SAT2 WE WISH
Active	CUTE 1 1.7+APDII Fuji-3 Hitomi Hodoyoshi 1 2 3 4 Horyu 2 Kiseki PROITERES Raijin Raijin-2 SEEDS SOCRATES XI IV V
Future	DRUMS KITSUNE OPUSAT-II QSAT-EOS RSP-01 SOMESAT SpaceTuna1 SPROUT TSUBAME WNI satellite

v t e ← 1993 Orbital launches in 1994 1995 →
January	Soyuz TM-18 Gals 1 Eutelsat II F5, Türksat 1A Meteor-3 #7, Tubsat-B Clementine, ISA Progress M-21
February	STS-60 (WSF, ODERACS A, ODERACS B, ODERACS C, ODERACS D, ODERACS E, ODERACS F, BremSat) Myojo, Ryusei Globus #13L USA-99 Shijian 4, Kua Fu 1 Kosmos 2268, Kosmos 2269, Kosmos 2270, Kosmos 2271, Kosmos 2272, Kosmos 2273 Gran' #40L Galaxy 1RR
March	Koronas-I STS-62 USA-100, SEDS-2 USA-101, USA-102 Kosmos 2274 Progress M-22
April	STS-59 Kosmos 2275, Kosmos 2276, Kosmos 2277 GOES 8 Kosmos 2278 Kosmos 2279 Kosmos 2280
May	USA-103 SROSS-C2 MSTI-2 STEP-2 Rimsat 2 Progress M-23 Tselina-D
June	Kosmos 2281 Foton #9 Intelsat 702, STRV 1A, STRV 1B USA-104 STEP-1
July	Soyuz TM-19 FSW-16 Kosmos 2282 STS-65 PAS-2, Yuri 3n Nadezhda #104 Kosmos 2283 Apstar 1 Kosmos 2284
August	Kosmos 2285 APEX DirecTV-2 Kosmos 2286 Brasilsat B1, Türksat 1B Kosmos 2287, Kosmos 2288, Kosmos 2289 Molniya 3-60 Progress M-24 Kosmos 2290 USA-105 Optus B3 Kiku 6 USA-106
September	Telstar 402 STS-64 (SPARTAN-201) Kosmos 2291 Kosmos 2292 STS-68
October	Soyuz TM-20 Intelsat 703 Solidarad 2 Thaicom 2 Okean-O1 #7 Ekspress-2 IRS-P2 Elektro #1L
November	Astra 1D Wind Kosmos 2293 STS-66 (CRISTA-SPAS) Resurs-O1 #3L Progress M-25 Kosmos 2294, Kosmos 2295, Kosmos 2296 Kosmos 2297 Geo-IK #24 Orion 1 Chinasat-6
December	PAS-3 Molniya 1-88 Altair #13L Kosmos 2298 USA-107 Radio-ROSTO Kosmos 2299, Kosmos 2300, Kosmos 2301, Kosmos 2302, Kosmos 2303, Kosmos 2304 Gran' #43L Kosmos 2305 NOAA-14
Launches are separated by dots ( • ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ). CubeSats are smaller. Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).