The satellite's orbit and mission are officially classified; however, it has been located by amateur observers in a retrogradelow Earth orbit. As of 23 January 2015 it was in an orbit with a perigee of 1,105 kilometres (687 mi), an apogee of 1,116 kilometres (693 mi) and 122.99 degrees of inclination.
Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).