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Soyuz MS-17 delivers fresh ISS crew

The second and final Russian crew mission of 2020 lifted off from Baikonur Cosmodrome in Kazakhstan on the morning of October 14 on a Soyuz-2-1a rocket. Just 3 hours, 3 minutes and 38 seconds after its launch, the Soyuz MS-17 spacecraft completed a successful docking at the International Space Station, ISS, setting a record for the fastest trip to the outpost. Onboard the ISS, two Russian cosmonauts and an American astronaut joined the 63rd long-duration expedition and they were scheduled to continue live and work on the ISS as Expedition 64 until April 2021.

Previous mission: Soyuz MS-16


Soyuz MS-17 mission at a glance:

Spacecraft designation Soyuz MS-17 (11F732) Production No. No. 747, ISS mission 63S
Launch vehicle Soyuz-2-1a No. 15000-045
Payload fairing 11S517A 3.1000A1-0 No. 15000-093
Launch Site Baikonur, Site 31, Pad No. 6
Launch date and time 2020 Oct. 14, 08:45:04 Moscow Time (05:45 UTC; 1:45 a.m. EDT)
Docking date and time 2020 Oct. 14, 11:48:53 Moscow Time (actual); 11:52:27 Moscow Time (planned)
Docking destination ISS, MIM1 Rassvet, Nadir port; to redock on March 17, 2021, to MIM2
Flight duration 185 days
Landing date 2021 April 17
Primary crew Sergei Ryzhikov, Sergei Kud'-Sverchkov, Kate Rubins
Backup crew Oleg Novitsky, Petr Dubrov, Mark T. Vande Hei

Soyuz MS-17 flight program

The Soyuz MS-17 (Production No. 747) is the 63rd vehicle in the Soyuz family slated for launch to the International Space Station.

In the 2014 version of the ISS flight manifest, launch of the Soyuz MS-17 was planned for September 13, 2020, but by the middle of 2019, the mission was re-scheduled for October 14 of the same year. At that time, Russian cosmonauts Anatoly Ivanishin and Ivan Vagner were planned for launch aboard Soyuz MS-17 and Roskosmos planned to add another cosmonaut in order to increase the Russian crew aboard the ISS from two to three people in anticipation of the MLM Nauka module launch, then planned in December 2020.

Also, continuous delays with the introduction of new American crew vehicles prompted NASA to negotiate the purchase of the third seat aboard Soyuz MS-17 for its astronaut. Initially, Stephen Bowen was considered as a candidate for that flight. In case a US astronaut had to be assigned to the mission and the Nauka ended up being ready for launch as previously planned at the end of 2020, Roskosmos would not have a large enough crew aboard the Russian Segment to receive and integrate the new module. But, anticipating another delay with Nauka as early as the Fall of 2019, Roskosmos had already taken steps to support the module's arrival in 2021. In early 2020, the launch of MLM was officially postponed until Spring of 2021.

In early May 2020, a press-release from the Zhukovsky airport disclosed that Russian cosmonauts Sergei Ryzhikov and Sergei Kud'-Sverchkov had been selected as primary members of the Soyuz MS-17 crew, with Oleg Novitsky and Petr Dubrov as their backups. For its part, NASA added astronaut Kate Rubins to the primary crew and Mark T. Vande Hei to the backup crew.

Due to additional risk associated with the coronavirus pandemic, Roskosmos assigned cosmonauts Anton Shkaplerov and Andrei Babkin to serve as another backup crew for the Soyuz MS-17 mission. The pair officially began their training on June 5, 2020.

Flight preparations


Soyuz MS-17 is being erected on the launch pad on October 11, 2020.

The active campaign for the launch of Soyuz MS-17 started in Baikonur on August 4, 2020, when the spacecraft was taken out of storage and installed at its processing work site to begin preparations starting with autonomous tests of various systems. Next, the spacecraft was placed into the vacuum chamber for leak checks which were completed on September 18, 2020.

On September 23, the solar panels of the Soyuz MS-17 spacecraft were exposed to an array of electric lights to test their performance and at the same time, specialists completed the outfitting of the ship's Descent Module and preparation of personal crew equipment, RKK Energia announced.

After the completion of their formal training at Star City, the primary and backup crews departed for Baikonur on the morning of September 27, 2020, for familiarization training with the actual spacecraft, which took place on September 28. The exercise included donning the flight suits and their leak checks, as well as a review of the flight equipment and the flight program. On the same day, a meeting of technical management cleared Soyuz MS-17 for the loading of propellant components and pressurized gases, and the same evening, the spacecraft was delivered to the fueling facility at Site 31. Fueling operations were completed as scheduled on October 1, with the return of the spacecraft to its processing facility at Site 254. The spacecraft was installed back into its dynamic stand for further processing, including the loading of cargo, the installation of thermal shielding, weight measurements and integration with the launch vehicle adapter. The latter operation took place on October 2.

On October 5, 2020, specialists conducted the final visual inspection of the vehicle, after which it was lowered in horizontal position and rolled inside its payload fairing. The entire assembly was then returned into vertical position in its processing rig for the simulation of launch readiness.

On October 7, the primary and backup crews conducted the second and final familiarization training inside the flight-ready spacecraft, this time without wearing safety pressure suits. The payload section with the Soyuz MS-17 spacecraft was then lowered in horizontal position and loaded onto the railway platform, which transported it from the spacecraft processing building at Site 254 to the vehicle assembly building at Site 31 on October 8, 2020, where integration with the Soyuz-2-1a launch vehicle which took place on October 9. On the morning of October 11, the launch vehicle with the spacecraft was rolled out from the assembly building and installed on the launch pad at Site 31, where specialists began autonomous tests of the rocket, the spacecraft and launch systems.

During a traditional pre-launch press-conference on October 13, the Soyuz commander Sergei Ryzhikov said that the crew would deliver new equipment to the station to help with the search for an elusive air leak aboard the Zvezda Service Module, SM. which has bugged the station's inhabitants and mission control in recent weeks.

The fueling of the rocket was scheduled to take place from 04:05 to 06:00 Moscow Time on October 14, 2020.

How Soyuz MS-17 will be launched


A Soyuz-2-1a rocket carrying the Soyuz MS-17 spacecraft lifted off from Site 31 in Baikonur on October 14, 2020, at 08:45:04.536 Moscow Time (1:45 a.m. EDT).

Propelled by the simultaneous thrust of the four engines of the first stage and the single engine of the second stage, the rocket headed east to align its ascent trajectory with an orbital plane inclined 51.6 degrees toward the Equator. Slightly less than two minutes into the flight, at an altitude of around 45 kilometers and a velocity of 1.75 kilometers per second, the ship's main emergency escape rocket was jettisoned, immediately followed by the separation of the four boosters of the first stage. Around 35 seconds later, as the vehicle exited the dense atmosphere at an altitude of 79 kilometers and a velocity of 2.2 kilometers per second, the payload fairing protecting the spacecraft split into two halves and fell away.

The second (core) stage of the booster continued firing until 4.8 minutes into the flight. Moments before the second stage completed its work, the four-chamber engine of the third stage ignited, firing through the lattice structure connecting the two stages. Moments after the separation of the core booster at an altitude of 157 kilometers and a velocity of 3.8 kilometers per second, the tail section of the third stage split into three segments and separated as well.

Following an 8 minute 49 second climb to orbit, the third stage of the rocket successfully released Soyuz MS-17 into a parking orbit at 08:53:53 Moscow Time (1:53 a.m. EDT).

According to Roskosmos the parameters of the initial orbit should be as following:

200 kilometers, +/–2.0 kilometers
242 kilometers, +/–5.0 kilometers
Orbital period
88.63 minutes, +/–0.05 minutes
Orbital inclination
51.67 degrees toward the Equator, +/–0.033 degrees

At the time, the ISS will be orbiting the Earth at an average altitude of around 419 kilometers.

Fast rendezvous achieved


Soyuz MS-17 followed a two-orbit, three-hour rendezvous profile to reach the International Space Station, ISS, for the first time. During its autonomous flight, the crew vehicle was scheduled to perform three major maneuvers to transfer from its initial orbit to a point for a fully automated rendezvous, flyaround and linkup with the station. The first maneuver was to be conducted around 20 minutes after reaching orbit, followed by another engine firing around 30 minutes later.

Summary of the Soyuz MS-17 orbit-correction maneuvers:

Velocity change
Impulse 1
11.2 meters per second
Impulse 2
50.9 meters per second
Impulse 3
48.6 meters per second

The docking of the Soyuz MS-17 at the nadir (Earth-facing) port of the MIM1 Rassvet module, a part of the Russian Segment was scheduled for 11:52:27 Moscow Time (08:52 UTC, 4:52 a.m. EDT) with a projected accuracy of around three minutes. In reality, the contact between the crew vehicle and the station took place ahead of schedule at 11:48:53 Moscow Time, as the two spacecraft were flying over the Mediterranean Sea, and despite some issue with the Kurs rendezvous antenna early in flight, according to NASA TV.

The actual time from launch to docking ended up to be 3 hours 3 minutes and 38 seconds. The two-orbit rendezvous process was previously tested during the flight of the Progress MS-15 cargo ship which reached the outpost 3 hours and 18 minutes after its liftoff.

Following a series of leak checks, the hatches between Soyuz MS-17 and the ISS were scheduled to be open around 13:45 Moscow Time (6:45 a.m. EDT). However, the operation took somewhat longer, with the opening of the hatch on the station's side around 13:50 Moscow Time, followed by opening of the Soyuz' hatch at 14:07 Moscow Time (6:07 a.m. EDT) on October 14, 2020.

Evolution of the Soyuz MS-17 flight program


Soyuz MS-17 (right) photographed aboard the ISS on October 18, 2020.

According to the initial flight program in early 2020, following its launch on October 14, 2020, the Soyuz MS-17 was to remain docked at the MIM1 Rassvet module until April 1, 2021. The spacecraft would then re-dock to the MIM2 Poisk module to make way for the arrival of Soyuz MS-18, then scheduled for launch on April 9, 2021. After the overlapping presence at the ISS of the two Russian crew vehicles, Soyuz MS-17 was scheduled to depart the station and land on April 17, 2021, after 185 days in space.

However, in the provisional flight manifest prepared by Roskosmos by the end of Summer 2020, the redocking date for the Soyuz MS-17 mission was advanced to March 10, 2021, and the landing date moved to April 9, 2021, preserving around a week-long overlap with the Soyuz MS-18 mission at the station, whose launch was advanced to April 1, 2021. As a result, the flight duration for the Soyuz MS-17 crew was cut to 177 days. Roskosmos officially confirmed the new flight duration for the Soyuz MS-17 mission ahead of the ship's launch on October 14, 2020.

In the November 2020 draft of the ISS flight manifest, the redocking of Soyuz MS-17 was pushed back from March 10 to March 17, 2021, and its landing was re-scheduled for April 17, 2021, after 185 days in space. The overlap with the Soyuz MS-18 mission would now expected to be around eight days.

Cosmonauts conduct VKD-47 spacewalk

On November 18, 2o20, Sergei Ryzhikov and Sergei Kyd-Sverchkov from the Soyuz MS-17 crew performed the 47th Russian spacewalk, VKD-47, in the history of the ISS project. Their primary goal was to lay the groundwork for the addition of the MLM Nauka module to the Russian Segment in 2021.



Soyuz MS-17 crews:

Primary crew
Backup crew
Soyuz commander
Sergei Ryzhikov
(Roskosmos, Expedition 64 commander)
Oleg Novistky
(Roskosmos, ISS flight engineer)
Soyuz flight engineer 1
Sergei Kud'-Sverchkov
(Roskosmos, Expedition 64 flight engineer)
Petr Dubrov
(Roskosmos, ISS flight engineer)
Soyuz flight engineer 2
Kate Rubins
(NASA, Expedition 64 flight engineer)
Mark Vande Hei
(NASA, ISS flight engineer)


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This page is maintained by Anatoly Zak; Last update: December 3, 2020

Page editor: Alain Chabot; Last edit: October 12, 2020

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The official logo of the Soyuz MS-17 mission. Credit: Roskosmos


Soyuz MS-17 (left) returns to its processing facility after vacuum tests on September 18, 2020. Click to enlarge. Credit: Roskosmos


Soyuz MS-17 (right) undergoes solar panels testing on September 23, 2020, at Site 254 in Baikonur, with the MLM Nauka module on the foreground and a pair of Progress-MS cargo ships on the background. The launch vehicle adapter, connecting the MLM to the third stage of the Proton rocket, can be seen on the right. Click to enlarge. Credit: Roskosmos


Soyuz MS-17 arrived at the fueling facility in Baikonur on the evening of September 28, 2020. Click to enlarge. Credit: Roskosmos


Soyuz MS-17 (background) returns to spacecraft processing building at Site 254 on October 1, 2020, after the completion of the fueling operations. Click to enlarge. Credit: Roskosmos


Soyuz MS-17 (left) was integrated with its launch vehicle adapter on October 2, 2020. Click to enlarge. Credit: Roskosmos


Sergei Ryzhikov boards Soyuz MS-17 during crew familiarization training on October 7, 2020. Click to enlarge. Credit: Roskosmos


Soyuz MS-17 is being transferred to the vehicle assembly building on October 8, 2020. Click to enlarge. Credit: Roskosmos


Soyuz MS-17 is being integrated with its launch vehicle on October 9, 2020. Click to enlarge. Credit: Roskosmos


Soyuz MS-17 crew during suiting-up operations few hours before launch on October 14, 2020. Left to right: Kate Rubins, Sergei Ryzhikov, Sergei Kud'-Sverchkov. Click to enlarge. Credit: Roskosmos


Due to coronavirus pandemic, the crew and launch personell were wearing masks during most of boarding operations. Click to enlarge. Credit: Roskosmos


Soyuz MS-17 lifts off on October 14, 2020. Click to enlarge. Credit: Roskosmos


Soyuz MS-17 approaches the MIM1 Rassvet module on October 14, 2020. Click to enlarge. Credit: Roskosmos