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Discovery and designation
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| Discovered by | H. E. Holt | |||||||||
| Discovery date | August 7, 1991 | |||||||||
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Designations
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| MPC designation | (9955) 1991 PU11 | |||||||||
| Alternate name(s) | 1967 RG1, 1974 SE3, 1998 SP121 | |||||||||
| Epoch October 27, 2007 | ||||||||||
| Ap | 2.6816502 AU | |||||||||
| Peri | 1.8657544 AU | |||||||||
| Semi-major axis | 2.2737023 AU | |||||||||
| Eccentricity | 0.1794201 | |||||||||
| Orbital period | 1252.2724397 d | |||||||||
| Mean anomaly | 238.56974° | |||||||||
| Inclination | 4.98738° | |||||||||
| Longitude of ascending node | 343.21114° | |||||||||
| Argument of peri | 24.23728° | |||||||||
| Dimensions | ~37.1 km[1] | |||||||||
| Geometric albedo | ~0.01 | |||||||||
| Surface temp. Kelvin Celsius |
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| Absolute magnitude (H) | 14.6 | |||||||||
(9955) 1991 PU11 is a main belt asteroid. It orbits the Sun once every 3.43 years.[2]
Discovered on August 7, 1991 by H. E. Holt, it was given the provisional designation "1991 PU11".[3]
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