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Hayato (satellite)

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Hayato (satellite)

Mission type Technology
Remote sensing
Operator Kagoshima University
COSPAR ID 2010-020A
SATCAT № 36573
Website .html/index.jpkasat
Mission duration 39 days
Spacecraft properties
Spacecraft type 1U CubeSat
Launch mass 1.5 kilograms (3.3 lb)[1]
Dimensions 10-centimetre (3.9 in) cube
Start of mission
Launch date 20 May 2010, 21:58:22 (2010-05-20T21:58:22Z) UTC
Rocket H-IIA 202
Launch site Tanegashima Yoshinobu 1
Contractor Mitsubishi
End of mission
Decay date 14 July 2010[2]
Orbital parameters
Reference system Geocentric
Regime Low Earth
Perigee 283 kilometres (176 mi)
Apogee 306 kilometres (190 mi)
Inclination 29.9 degrees
Period 90.4 minutes
Epoch 23 May 2010[2]

Hayato,[3] known before launch as K-Sat, or the Kagoshima Satellite, is a Japanese satellite which was launched in May 2010. It is a student-built spacecraft, which is operated by Kagoshima University, and is being used for technology demonstration and remote sensing.[1] The satellite is a single unit CubeSat, and carries equipment to study water vapour in the Earth's atmosphere, microwave imagery and spacecraft communication.[1][4]

The launch was conducted by Mitsubishi Heavy Industries under contract to the Japan Aerospace Exploration Agency. In preparation for a planned launch on 17 May, the H-IIA rocket was rolled out to Pad 1 of the Yoshinobu Launch Complex at the Tanegashima Space Centre on 16 May 2010. It departed the assembly building at 21:01 UTC and arriving at the launch pad 24 minutes later at 21:25 UTC.[5] The terminal countdown began at 11:30 UTC on 17 May and by 15:28, the loading of cryogenic propellant into the rocket's first and second stages had been completed.[5] The launch attempt was scrubbed a few minutes before liftoff due to bad weather, but took place successfully at 21:58:22 UTC on 20 May 2010.

Hayato was deployed from a JAXA Picosatellite Deployer attached to the second stage of the H-IIA 202 rocket used in the launch of the Akatsuki spacecraft towards Venus. K-Sat shared its dispenser with the Negai ☆ satellite, whilst a second dispenser contained Waseda-SAT2. The three CubeSats separated into low Earth orbit during a coast phase of the launch, between the first and second burns of the second stage. The rocket then continued to Heliocentric orbit, where it deployed Akatsuki, along with the IKAROS and UNITEC-1 spacecraft.[6]

See also


  1. ^ a b c Krebs, Gunter. "K-SAT". Gunter's Space Page. Retrieved 17 May 2010. 
  2. ^ a b Committee on the Peaceful Uses of Outer Space. "Information furnished in conformity with the Convention on Registration of Objects Launched into Outer Space". Retrieved 27 January 2014. 
  3. ^ "". MSN. 21 May 2010. Retrieved 22 May 2010. 
  4. ^ "鹿児島人工衛星開発部会 プロジェクト". Kagoshima University. Retrieved 17 May 2010. 
  5. ^ a b "Countdown Report". H-IIA Launch Services Flight 17. Mitsubishi Heavy Industries. Retrieved 17 May 2010. 
  6. ^ "Overview of Secondary Payloads". Akatsuki Special Site. JAXA. Retrieved 17 May 2010. 
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