Baikonur Cosmodrome Site 31

45°59′46″N 63°33′51″E / 45.99611°N 63.56417°E / 45.99611; 63.56417

Site 31/6

A Soyuz 2 rocket at LC-31/6
Launch site	Baikonur Cosmodrome
Location	Kazakhstan
Time zone	UTC+5 (AQTT)
Operator	Strategic Missile Forces, Russian Aerospace Forces, Roscosmos
Launch pad(s)	1
Orbital inclination range	49–99°
Launch history Status Active Launches 437 First launch 14 January 1961 R-7A Last launch 21 November 2024 Soyuz 2.1a (Progress MS-29) Associated rockets Current: Soyuz 2 Retired: R-7A, Vostok, Voskhod, Polyot, Molniya, Soyuz, Soyuz-L, Soyuz-U, Soyuz-U2, Soyuz-FG/Fregat

Baikonur Site 31, also known as Site 31/6 at the Baikonur Cosmodrome, in Kazakhstan, is a launch site used by derivatives of the R-7 Semyorka missile. Since Roscosmos' change from flying crew on the Soyuz-FG to the Soyuz-2 launch vehicle for crewed flights in 2020, it has served as the primary launch site for Soyuz flights to the International Space Station. It took over from Site 1/5 (Gagarin's Start) after the latter failed to receive funding to modernize it for the slightly larger Soyuz-2 rocket.^{[1][verification needed]}

Before that, it only saw a handful of crewed flights when Site 1/5 was unavailable (Soyuz TMA-06M, Soyuz TMA-15M, Soyuz MS-02).

It was first used on 14 January 1961, for an R-7A ICBM test mission. As of 2023 it is currently used for Soyuz-2 launches. In the 1970s and early 1980s, several crewed missions were launched from the site.

A panorama of the Baikonur Cosmodrome Site 31 taken from atop the Soyuz support structure. A Zenit facility can be seen in the distance.