Spektr-R (RadioAstron), a Russian scientific satellite, has a radio telescope of 10 m (33 ft) diameter.
| Name of Satellite | Spektr-R (RadioAstron) |
| Purpose | Space Science |
| Contractor | Lavochkin |
| Country of Contractor | Russia |
| Launch Mass (kg.) | 3 660 |
| Class of Orbit | Elliptical |
| Perigee (km) | 1 000 |
| Expected Lifetime (yrs.) | 5 |
| Date of Launch | 18.07.2011 |
| Launch Site | Baikonur Cosmodrome |
| Launch Vehicle | Zenit 3SLBF/Fregat SB |
| COSPAR Number | 2011-037A |
| NORAD Number | 37755 |
It designed Spektr-R for studying structure and dynamics of radio sources inside as well as outside the Milky Way.
