| Atlas MA-9 |
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 Last crewed Mercury-Atlas |
Mercury-Atlas was a subprogram of Project Mercury[1]: 1 that included most of the flights and tests using the Atlas LV-3B launch vehicle. The Atlas was also used for one Mercury flight under the Big Joe subprogram.[2]: 207
The Mercury mission numbering system was: a two-letter designation marking the launch vehicle type, followed by a dash, then a number designating the flight/test number. The Atlas launch vehicles used for Project Mercury were given a two- or three-digit number followed by a "-D", indicating that they were the "D" version of the Atlas.
The missions flown in Mercury-Atlas were:
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| General |
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| Missions |
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| Flown non-human |
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| Astronauts |
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| Subprograms |
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| Contractors |
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| Rockets |
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| Launch sites and Control Center |
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| Related programs |
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| Related |
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