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Discovery
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| Discovered by | Cornelis Johannes van Houten, Ingrid van Houten-Groeneveld and Tom Gehrels |
| Discovery date | September 24, 1960 |
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Designations
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| Named after | Ptah |
| Alternate name(s) | 6743 P-L |
| Minor planet category |
Apollo Mars crosser |
| Epoch January 1, 2007 (JD 2488070.5) | |
| Aphelion | 2.450 AU (366.546 Gm) |
| Perihelion | 0.818 AU (122.318 Gm) |
| Semi-major axis | 1.634 AU |
| Eccentricity | 0.500 |
| Orbital period | 2.092 a (763.949 d) |
| Average orbital speed | 45.471 km/s |
| Mean anomaly | 159.679° |
| Inclination | 7.425° |
| Longitude of ascending node | 9.556° |
| Argument of perihelion | 107.247° |
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Physical characteristics
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| Dimensions | 1.1 - 2.6 km |
| Rotation period | h |
| Absolute magnitude (H) | 17.1 |
5011 Ptah is a highly eccentric Mars crossing and Apollo asteroid, discovered in 1960 and named after an Egyptian god, Ptah. It passes within 30 Gm (0.2 AU) of Earth 15 times between 1900 and 2100, most recently on January 21, 2007, at 29.6 Gm. The next one will be in 2027 at 28.6 Gm
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