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Haruka (meaning "far away") is the post-launch name of the Japanese Muses-B radio astronomy satellite. The spacecraft carries a wire mesh dish antenna 8 m in diameter as one part of a radio astronomy interferometer, with the other part being any one of a number of ground-based radio telescopes. It carries detectors which operate at 1.6, 5 and 22 GHz (18, 6, and 1.3 cm, respectively), and will be able to make radio images with very high spatial resolution (the highest yet in very-long baseline interferometry) and permit precise measurements of quasar jets and galactic maser sources. Its planned lifetime is 3-5 years.

Alternate Names

  • 24720
  • Haruka
  • Highly Advanced Laboratory for Communications and Astronomy
  • Muses-B

Facts in Brief

Launch Date: 1997-02-12
Launch Vehicle: M-5
Launch Site: Uchinoura Space Center, Japan
Mass: 830 kg
Nominal Power: 2.5 W

Funding Agency

  • Institute of Space and Aeronautical Science, U of Tokyo (Japan)


  • Astronomy

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office


Other Sources of HALCA Information/Data

HALCA mission page at ISAS
The VLBI Space Observatory Programme

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