Orbiter The orbiter's primary mission ended on October 5, 1976, at the beginning of solar conjunction. The extended mission commenced on December 14, 1976, after the solar conjunction. On December 20, 1976, the periapsis was lowered to 778 km, and the inclination raised to 80 degrees.
Orbiter The orbiter's primary mission ended on October 5, 1976, at th:e beginning of sol?ar conjunction. The extended mission commenced on December 14, 1976, after the solar conjunction. On December 20, 1976, the periapsi?s was lowered to 778 :km, and the inclination raised to 80 degrees.