The Japanese Institute of Space and Astronautical Science (ISAS) has
launched the MUSES B satellite early on Feb 12, 1997. (1350 JST or 1358 JST
according to different reports). It has been renamed 'Haruka', which
means 'far-away'.
Haruka is the space
segment of the VSOP (VLBI Space Observatory Programme), and will unfurl
an 8-meter radiotelescope antenna to make joint observations with ground
based radio observatories, simulating a telescope larger than the Earth.
Haruka carries detectors operating at 1.6, 5 and 22 GHz, and will be
able to make radio images with very high spatial resolution,
permitting precise measurements of quasar jets and galactic maser
sources. MUSES B is the second Mu Space Engineering Satellite; the
first was the MUSES A (Hiten) probe which pioneered use of advanced orbital
dynamics and aerobraking.
This was the first launch of the Japanese ISAS agency's three stage
solid fuel M-V (Mu-5) rocket. M-V-1 was launched from the Kagoshima
Space Center. The M-14 first stage separated 25s after launch, followed
by the M-24 second stage at T+3min:33s. The M-34 third stage continued
the ascent, separating at 5min 39sec after spinning up the payload
section. The KM-V1 solid kick motor ignited to raise apogee, and
separated 8 minutes after launch to leave Haruka in a 233 x 21527 km x
31.2 deg orbit. On-board RCS burns will raise the perigee over the next
week. The KM-V1 motor (1997-05B) is in a 230 x 21452 km x 31.3 deg
orbit.
All four of the stages involved in this launch had never flown before,
so this was a crucial test for the ISAS launch vehicle group.