Launch from the Baikonur Cosmodrome; landing
540 km northwest of Karaganda (53. latitude grade).
The launch was
scrubbed several times due of technical problems and excessive solar flare
activity. The cosmonaut was originally intended to stay in orbit for eight
days, but the spacecraft ended up in a lower than planned orbit. Combined with
increased atmospheric activity due to solar levels, Vostok 5 quickly decayed
and temperatures in the service module reached very high levels (up to
30°C) and turned down on the 3rd day to only 10°C. So the mission had
to be shortened.
Mission objectives were officially: further study of
the effect of various spaceflight factors in the human organism; extensive
medico-biological experiments under conditions of prolonged flight; further
elaboration and improvement of spaceship systems, but no results were
published. Unlike earlier missions, only a black and white film camera was
carried. Photometric measurements of the earth's horizon were made.
was a rendezvous flight with Vostok 6
(4,5 km distance) at time. There were directly communication between both
capsules during the closest approach. Later on the cosmonaut performed
communications experiments with submarines and airplanes.
with the spacecraft's wast collection system (probably a spill) made conditions
"unpleasant" in the capsule. Once again the Vostok service module failed to
separate cleanly from the reentry sphere. Wild gyrations ensued until the heat
of reentry burned through the non-separating retraining strap. But all in all
it was the longest flight duration of a spacecraft until that time.
Many errors occurred in the entire landing sequences, including actions of
recovery forces. Both spacecraft landed two
degrees of latitude north of the aim point. It was calculated that this could
have occurred by duplicate landing commands having been sent, but such a
failure could not be duplicated in postflight tests of ground
was originally intended to stay in orbit for eight
days, but the mission details changed many times due to elevated levels of
solar flare activity at the time and he was eventually ordered back after five
days. This remains the record for solo manned flight in Earth orbit.