(26375) 1999 DE9
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- The correct title of this article is (26375) 1999 DE9. It features superscript or subscript characters that are substituted or omitted because of technical limitations.
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Discovery
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| Discovered by | Chadwick A. Trujillo and Jane X. Luu |
| Discovery date | 20 February 1999 |
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Designations
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| MPC designation | (26375) 1999 DE9 |
| Alternative names | none |
| Minor planet category |
TNO |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 11816.233 Gm (78.987 AU) |
| Perihelion | 4835.563 Gm (32.324 AU) |
| Semi-major axis | 8325.898 Gm (55.655 AU) |
| Eccentricity | 0.419 |
| Orbital period | 151655.072 d (415.21 a) |
| Average orbital speed | 3.81 km/s |
| Mean anomaly | 17.891° |
| Inclination | 7.620° |
| Longitude of ascending node | 322.993° |
| Argument of perihelion | 159.961° |
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Physical characteristics
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| Dimensions | 461 ±45 km[1] |
| Mass | 1.3×1020? kg |
| Mean density | 2.0? g/cm³ |
| Escape velocity | 0.2670? km/s |
| Sidereal rotation period |
? d |
| Albedo | 0.06-0.08[1] |
| Temperature | ~37 K |
| Spectral type | ? |
| Absolute magnitude | 4.7 |
(26375) 1999 DE9 (also written (26375) 1999 DE9) is an object of the solar system located beyond the orbit of Neptune. It was discovered in 1999 by Chad Trujillo and Jane X. Luu.
It is classified as a resonant as its 417-year orbit is in 2:5 resonance with Neptune's orbit. Spectral analysis has shown traces of ice.
[edit] References
- ^ a b Stansberry, Grundy, Brown, Spencer, Trilling, Cruikshank, Luc Margot Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope (2007) [Preprint arXiv]
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