Ohsumi (satellite)

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Mission type Earth science
Operator Institute of Space and Aeronautical Science, University of Tokyo (now part of JAXA)
COSPAR ID 1970-011A
SATCAT no. 04330
Spacecraft properties
Launch mass 24.0 kilograms (52.9 lb)[1]
Power 10.3 watt[1]
Start of mission
Launch date February 11, 1970, 04:25 (1970-02-11UTC04:25Z) UTC
Rocket Lambda-4S
Launch site Kagoshima LA-L
Contractor ISAS
End of mission
Last contact February 12, 1970 (1970-02-13)[2]
Decay date August 2, 2003[3]
Orbital parameters
Reference system Geocentric
Regime Medium Earth
Eccentricity 0.262379[4]
Perigee 350 kilometres (220 mi)
Apogee 5,140 kilometres (3,190 mi)
Inclination 31.0 degrees[5]
Period 144.0 minutes
Epoch 10 February 1970, 23:25:00 UTC[4]

Ōsumi (or Ohsumi) is the name of the first Japanese satellite put into orbit, named after the Ōsumi Province in the southern islands of Japan. It was launched on February 11, 1970 at 04:25 UTC with a Lambda 4S-5 rocket from Uchinoura Space Center by Institute of Space and Aeronautical Science, University of Tokyo, now part of the Japan Aerospace Exploration Agency (JAXA). Japan became the fourth nation after the USSR, United States and France to release an artificial satellite into successful orbit on its own.

See also


  1. ^ a b "Ohsumi". NASA NSSDC Master Catalog. NSSDC, NASA. Retrieved 2008-02-12.
  2. ^ "ohsumi". Archived from the original on 11 May 2013. Retrieved 14 August 2015.
  3. ^ "SPX-598". SPACEWARN Bulletin. NSSDC, NASA. Archived from the original on 2008-01-05. Retrieved 2008-03-02.
  4. ^ a b "Trajectory Details". NASA NSSDC Master Catalog. NSSDC, NASA. Retrieved 2008-02-12.
  5. ^ "Osumi". Encyclopedia Astronautica. Astronautix. Retrieved 2008-03-02.

External links

  • Kiwi-Osumi-image

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