Mercury-Atlas 10
| Mission type | Test flight |
|---|---|
| Operator | NASA |
| Mission duration | 3 days (planned) |
| Spacecraft properties | |
| Spacecraft | Mercury No.15 |
| Manufacturer | McDonnell Aircraft |
| Launch mass | ~1,490 kilograms (3,284 lb) |
| Crew | |
| Crew size | 1 |
| Members | Alan Shepard |
| Callsign | Freedom 7 II |
| Start of mission | |
| Launch date | 1963 (cancelled) |
| Rocket | Atlas LV-3B |
| Launch site | Cape Canaveral LC-14 |
Mercury-Atlas 10 (MA-10) was a cancelled early crewed space mission, which would have been the last flight in NASA's Mercury program. It was planned as a three-day extended mission, to launch in late 1963; the spacecraft, Freedom 7-II, would have been flown by Alan Shepard, a veteran of the suborbital Mercury-Redstone 3 mission in 1961. However, it was cancelled after the success of the one-day Mercury-Atlas 9 mission in May 1963, to allow NASA to focus its efforts on the more advanced two-man Gemini program.