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Sfera-53 (TEKh-44, Vektor-T)


Sfera-53 (also known as TEKh-44 or Vektor-T) is a small, passive satellite to measure the atmospheric density. The 53 cm diameter sphere (hence the name) was transported on 1 August 2012 on Progress-M 16M to the ISS.

Release of Sfera was made during a spacewalk (EVA) in the aft-nadir from ISS utilizing a mechanism that was attached to it prior to the EVA. Deployment occurred on 20 August 2012 at 18:29 UTC. It re-entered in late November 2012.

Nation: Russia
Type / Application: Atmosphere density
Configuration: 53 cm sphere
Propulsion: None
Power: None
Lifetime: 3 months
Mass: 13 kg
Satellite COSPAR Date LS Launch Vehicle Remarks
Sfera 53 (TEKh-44, Vektor-T) 1998-067CM 01.08.2012 Ba LC-1/5 Soyuz-U with Progress-M 16M


  • NSSDC Master Catalog: Sfera