5011 Ptah
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| Discovery A | |
|---|---|
| Discoverer | C. J. van Houten, I. van Houten-Groeneveld, T. Gehrels |
| Discovery date | September 24, 1960 |
| Alternate designations B |
6743 P-L |
| Category | Apollo Mars crosser |
| Orbital elements C | |
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| Eccentricity (e) | 0.500 |
| Semi-major axis (a) | 1.634 AU |
| Perihelion (q) | 0.818 AU (122.318 Gm) |
| Aphelion (Q) | 2.450 AU (366.546 Gm) |
| Orbital period (P) | 2.092 a (763.949 d) |
| Mean orbital speed | 45.471 km/s |
| Inclination (i) | 7.425° |
| Longitude of the ascending node (Ω) |
9.556° |
| Argument of perihelion (ω) |
107.247° |
| Mean anomaly (M) | 159.679° |
| Physical characteristics D | |
| Dimensions | 1.1 - 2.6 km |
| Mass | |
| Density | |
| Surface gravity | |
| Escape velocity | |
| Rotation period | h |
| Spectral class | |
| Absolute magnitude | 17.1 |
| Albedo (geometric) | |
| Mean surface temperature |
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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
[edit] References
- main NeoDys
- NASA JPL Small-Body Database Browser on 5011 Ptah
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