Kosmos 1686 (top) docked to Salyut 7, imaged by Range-Doppler radar.
Salyut program insignia
Station statistics
COSPAR ID
1985-086A
SATCAT no.
16095
Call sign
Salyut 7
Launch
1985-09-27 02:01:00 UTC Docked to Salyut 7 on 1985-10-02.
Launch pad
Baikonur Cosmodrome, USSR
Reentry
February 7, 1991
Mass
20,000 kg
Length
15 m
Width
16 m
Diameter
4.15 m
Periapsis altitude
219 km (118.25 nmi)
Apoapsis altitude
278 km (150.1 nmi)
Orbital inclination
51.6 degrees
Orbital period
89.2 minutes
Orbits per day
16.14
Days in orbit
1959 days
Statistics as of deorbit & reentry References:[1][2]
Configuration
Combined Kosmos 1686-Salyut 7 space station complex
Kosmos 1686 (Russian: Космос 1686 meaning Cosmos 1686), also known as TKS-4, was a heavily modified TKS spacecraft which docked unmanned to the Soviet space station Salyut 7 as part of tests to attach scientific expansion modules to stations in Earth orbit. The module which docked to the station was the FGB component of a TKS vehicle launched on September 27, 1985, and was designed to test systems planned for use on the Mir Core Module. The spacecraft docked with Salyut 7 on October 2, 1985, during the long-duration stay of the cosmonauts of its fifth principal expedition, which arrived on Soyuz T-14.[2] It was the last flown TKS spacecraft.
^"COSMOS 1686 DEB Satellite details 1985-086C NORAD 16128". n2yo.com. June 29, 2007. Retrieved June 29, 2007.
^ abPortree, David (March 1995). Mir Hardware Heritage. Lyndon B. Johnson Space Center, United States of America: NASA.
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