2019 Russian uncrewed spaceflight to the ISS
Soyuz MS-14
was a
Soyuz
spaceflight to the
International Space Station
.
[1]
It carried no crew members, as it was intended to test a modification of the
launch abort system
for integration with the
Soyuz-2.1a
launch vehicle.
[8]
It launched successfully on 22 August 2019 at 03:38
UTC
.
[2]
It was the first mission of the Soyuz crew vehicle without a crew in 33 years, and the first ever unpiloted mission of Soyuz to the ISS.
[9]
Overview
[
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Unlike the traditional
Soyuz-FG
launcher which is turned on its launchpad to set
azimuth
of its flight, Soyuz-2 performs a roll maneuver during its flight to change direction. The maneuver would trigger the analog launch abort system designed for Soyuz-FG. Soyuz MS-14 tested a solution for this issue. The 14th flight of Soyuz MS is the 143rd flight of a Soyuz spacecraft. If all goes well, future crewed missions will use the new configuration starting with
Soyuz MS-16
in early 2020.
[10]
Besides testing the integration of the new launcher and the abort system Soyuz MS-14 is also testing an upgraded navigation and propulsion control system.
[11]
The results of the testing will be used in the design of
Soyuz GVK
, an uncrewed cargo delivery and return spacecraft, tentatively scheduled to be launched for the first time in 2022.
[11]
Unlike preceding and future Soyuz MS spacecraft, Soyuz MS-14 lacks various crew support systems.
The spacecraft carried cargo to the International Space Station, among other things a humanoid robot
Fedor
that travelled in the crew compartment of the Soyuz (which was available to use as the mission had no crew). The Fedor robot returned to Earth on 6 September 2019 in the landing crew capsule of Soyuz MS-14 (which was again uncrewed). According to NASA, 1,450 pounds (660 kg) of cargo were delivered to ISS.
[9]
The spacecraft delivered the
Mini-EUSO
telescope to the ISS.
[12]
Aftermath
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In August 2021, the descent module was handed over to
Magnitogorsk Iron and Steel Works
for placement in a museum.
[13]
Docking
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First attempt
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Following a flawless two-day-long free flight and rendezvous with the ISS, MS-14 was scheduled to dock with the station's
Poisk
module at 05:30 UTC on 24 August 2019. During the final phases of the spacecraft's approach to the ISS, its
Kurs rendezvous system
failed to lock onto the station and the spacecraft was not able to dock.
Expedition 60
commander
Aleksey Ovchinin
commanded MS-14 to abort its docking, after which the spacecraft backed away to a safe distance from the ISS.
[14]
Whereas most unmanned Russian spacecraft flying to ISS also feature a
TORU
backup system enabling cosmonauts to take manual control of the spacecraft from the ISS, this system was not fitted to MS-14.
[15]
The fault was located on the Kurs signal amplifier on ISS's
Poisk
docking module, and initial plans called for the cosmonauts to replace this amplifier ahead of a new docking attempt.
[16]
It was subsequently decided that, on 26 August, the crew of
Soyuz MS-13
would relocate their spacecraft from the aft port on the
Zvezda
module to perform a manual docking at the faulty
Poisk
port, freeing up a port for MS-14 to dock using Kurs on 27 August 2019.
[15]
Second attempt
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]
After trailing the ISS for several days at a distance of over 160 miles, Soyuz MS-14 successfully docked autonomously to the
Zvezda
aft port on 27 August 2019 at 03:08
UTC
.
[5]
References
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Past missions
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Uncrewed missions are designated as
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instead of
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; exceptions are noted "(uncrewed)".
The † sign designates failed missions.
Italics
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