Orbit Inclination: 51 degrees
Perigee: 436 km
Apogee: 630 km

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Solrad 10, known as Explorer 44 before launch, was the third in
a series of small satellites launched by the US Naval Research
Laboratory to study the Sun. It went into orbit on 8 July
1971. It was in ... an eccentric orbit, with apogee 630 km, perigee
436 km, and inclination 51 degrees. The orbital period was just
over 95 minutes. The satellite was spin stabilized at 60
rpm. The satellite spin axis was pointed toward the Sun. All of
the solar X-ray and UV sensors were located on the Sun-facing
end parallel to the spin axis. The satellite was 12 sided, with
a diameter of 0.76 m and a height of 0.59 m. It weighed about
118 kg. Solrad 10's scientific instruments were dedicated to
studying the solar electromagnetic radiation, specifically in
the UV/X-ray region. However, it could be commanded to study
radiations from other stellar sources. The spacecraft descended
into the atmosphere on 15 December 1979.

Additional information available at
http://heasarc.gsfc.nasa.gov/docs/heasarc/missions/solrad10.html

[Summary provided by NASA]

http://heasarc.gsfc.nasa.gov/docs/heasarc/missions/solrad10.html