|Mission type||Spacecraft imaging|
|Launch mass||40 kilograms (88 lb)|
|Start of mission|
|Launch date||25 September 2008, 13:10UTC|
|Rocket||Chang Zheng 2F|
|Launch site||Jiuquan LA-4/SLS-1|
|Deployed from||Shenzhou 7|
|Deployment date||27 September 2008, 11:27 UTC|
Banxing or BX-1 (Chinese: 伴星; lit. 'Companion Satellite'), is a small Chinese technology development satellite which was deployed from the Shenzhou 7 spacecraft at 11:27 GMT on 27 September 2008. Prior to deployment, the satellite was mounted on top of the Shenzhou 7 orbital module.
Banxing was used to relay images of the Shenzhou 7 spacecraft. Weighing some 40 kilograms, and containing two cameras and communication equipment, it was maneuvered using an ammonia gas-based propulsion system. Following the re-entry of Shenzhou 7, Banxing remained in orbit as part of a formation-flying experiment with the discarded Shenzhou orbital module.
A few hours after Banxing was launched it and the Shenzhou 7 orbital module passed unusually close to the International Space Station. This provoked some speculation that the experiment was intended to test military anti-satellite interception technology.