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Discovery[1]
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|---|---|
| Discovered by | David Rabinowitz |
| Discovery date | December 17, 2009(?) |
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Designations
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| MPC designation | 2009 YE7 |
| Minor planet category |
TNO Cubewano[2] Haumea family?[3] |
| Epoch December 15, 2009 (2455180.5) | |
| Aphelion | 51.1 AU (Q) |
| Perihelion | 35.9 AU (q) |
| Semi-major axis | 43.5 AU (a) |
| Eccentricity | 0.17 |
| Orbital period | 287 yr |
| Mean anomaly | 180° (M) |
| Inclination | 29.2° |
| Longitude of ascending node | 138° |
| Argument of perihelion | 96° |
| Satellites | ? |
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Physical characteristics
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| Dimensions | 440[4]-945[5] km[2][6] |
| Albedo | assume 0.7 to 0.15 |
| Apparent magnitude | ~20(?)(JPL Horizons) |
| Absolute magnitude (H) | 2.8[2] |
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2009 YE7 is a trans-Neptunian object with an absolute magnitude of 2.8.[2] This qualifies it as a dwarf planet candidate. It was discovered by David Rabinowitz on December 17, 2009 at the La Silla Observatory in Chile. 2009 YE7 is the first bright KBO found from the southern hemisphere.