Venera 13 Date: 10.30.1981 Venera 13 was one of the third pair of heavy Venus flyby/lander probes launched towards Venus by the Soviet Union in the 1970s (after Venera 9/10 and Venera 11/12).
The Soviets picked the landing site for Venera 13 based on information passed on by NASA from the Pioneer Venus Orbiter vehicle.
The Venera 13/14 combination had an improved set of instruments (such as the spectrophotometer, the gas chromatograph, and the mass spectrometer), including a redesigned soil sampler.
After two midcourse corrections on 10 November 1981 and 21 February 1982, the Venera 13 lander separated from its parent on 27 February 1982. The capsule entered the Venusian atmosphere and began relaying atmospheric data back to the flyby probe, which continued to fly past the planet after a 36,000-kilometer-range encounter.
After a roughly 1-hour-long descent, the lander set down on the Venusian surface at 03:57:21 UT on 1 March 1982. Landing coordinates were 7.5° south latitude and 303° longitude. The probe continued to transmit for another additional 127 minutes, far beyond the planned lifetime of 32 minutes.
The probe found temperature and pressure to be 465°C and 89.5 atmospheres, respectively. Venera 13 repeated the attempts at color surface photography (using red, green, and blue filters) that failed on Veneras 11 and 12 and succeeded by relaying to Earth the first color photographs of the surface of Venus. Venera 13 returned eight successive panoramas showing a field of orange-brown angular rocks and loose soil. Successful soil analysis (which failed on Veneras 11 and 12) showed soil similar to terrestrial leucitic basalt with a high potassium content.
The flyby module entered heliocentric orbit. Its engine was fired on 10 June 1982 as part of a test for the anticipated Halley's Comet flyby.
