| Name of Satellite, Alternate Names | TDRS-12 (Tracking and Data Relay Satellite, TDRS L) |
| Country of Operator/Owner | USA |
| Operator/Owner | National Aeronautics and Space Administration (NASA) |
| Users | Government |
| Purpose | Communications |
| Class of Orbit | GEO |
| Type of Orbit | |
| Longitude of GEO (degrees) | |
| Perigee (km) | 35780 |
| Apogee (km) | 35785 |
| Eccentricity | 5.93084633177154E-05 |
| Inclination (degrees) | 6.99 |
| Period (minutes) | 1435.88 |
| Launch Mass (kg.) | 3454 |
| Dry Mass (kg.) | 1600 |
| Power (watts) | 3,500 (EOL) |
| Date of Launch | 23-01-2014 |
| Expected Lifetime | 15 yrs. |
| Contractor | Boeing Satellite Systems |
| Country of Contractor | USA |
| Launch Site | Cape Canaveral |
| Launch Vehicle | Atlas 5 |
| COSPAR Number | 2014-004A |
| NORAD Number | 39504 |
| Comments | New generation of tracking and commmunication satellites. |