Launch data:
| Designation | 00183 / 1961A-Alpha1 / 61025A |
| Launch date | 13 Sep 1961 - 14:04 UT |
| Launch site | CC, LC-14 |
| Launch vehicle | Atlas-D Mercury (#88D) |
| Payload | Spacecraft n° SC8A |
| Basic shape | Cone-frustum |
| Size (m) | 2.90 long - 1.83 dia |
| Mass at launch | 1225 kg |
| Mission | Unmanned, Robot astronaut |
| Earth orbit on Sep 13.6: | |
| - Perigee / Apogee | 156 x 248 km |
| - Eccentricity | 0.007 |
| - Inclination | 32.80° |
| - Period | 88.4 min |
| Distance | 26,047 statude miles |
| Velocity | 17,526 mph |
| Max Q | 975 psf |
| Max G | 7.7 |
| Landing date - time | 13 Sep 1961 (.66) |
| Landing location | Atlantic, near Bermuda island |
| Prime recovery ship | USS Plymouth Rock (LSD 29); capsule after 3h 10 min recovered by USS Decatur (DD 936) |
| Flight Duration (d:hr:min) | 1 hr, 49 min, 20 sec |
| Nbr orbits | 1 |
Mercury 4 cabine
