(26375) 1999 DE9

Trans-Neptunian object October 2012 yes #C2E0FF (26375) 1999 DE 9 Chadwick A. Trujillo andJane X. Luu 20 February 1999 (26375) 1999 DE 9 TNO2:5 resonanceMarc W. Buie Marc W. Buie 2008-03-14 Orbit Fit and Astrometric record for 26375 SwRI (Space Science Department) http://www.boulder.swri.edu/~buie/kbo/astrom/26375.html 2008-09-24 5 May 2025 (JD 2460800.5) 55.370 AU Tm on 32.159 AU Tm on 78.581 AU Tm on on 0.41919 412.02 yr (150493 d) 7.6148° 322.908° 159.154° 34.314° 3.81 km/s 0 461 ± 45 kmStansberry, Grundy, Brown, Spencer, Trilling, Cruikshank, Luc Margot Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope (2007) astro-ph/0702538 CO 2-type ("double-dip")etal Noemí Pinilla-Alonso Rosario Brunetto Mário N. De Prá Bryan J. Holler Elsa Hénault Ana Carolina de Souza Feliciano A JWST/DiSCo-TNOs portrait of the primordial Solar System through its trans-Neptunian objects https://hal.science/hal-04961629v1/file/s41550-024-02433-2.pdf Nature Astronomy December 2024 9 2 230–244 10.1038/s41550-024-02433-2 2025NatAs...9..230P 274932942 4.89 0.06–0.08 48.1 K (perihelion) etal R. Brunetto E. Hénault S. Cryan N. Pinilla-Alonso J. P. Emery A. Guilbert-Lepoutre Spectral Diversity of DiSCo's TNOs Revealed by JWST: Early Sculpting and Late Irradiation The Astrophysical Journal Letters March 2025 982 1 L8 free 10.3847/2041-8213/adb977 2025ApJ...982L...8B 25928742210 0.0023921 ms / day https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=26375 JPL Small-Body Database Browser: 26375 (1999 DE9) NASA/Jet Propulsion Laboratory 17 August 2025 24 h d on on 12873 days (35.24 yr) 2 31.176 AU Tm on 26.8847 AU Tm on (26375) 1999 DE 9 is a trans-Neptunian object. Light-curve-amplitude analysis shows only small deviations, suggesting 1999 DE 9 is a spheroid with small albedo spots.Tancredi, G., & Favre, S. (2008) Which are the dwarfs in the Solar System?. Depto. Astronomía, Fac. Ciencias, Montevideo, Uruguay; Observatorio Astronómico Los Molinos, MEC, Uruguay. Retrieved August 10, 2011 Measurements by the Spitzer Space Telescope estimate that it is 461 ± 45 km in diameter. It was discovered in 1999 by Chad Trujillo and Jane X. Luu. 1999 DE 9's orbit is in 2:5 resonance with Neptune's. Spectral analysis has shown traces of ice.Fig 3 for 1999 DE9September 2025 References External links 26375 (26374) 1999 CP106 26375 (26375) 1999 DE 9 26376 Roborosa Category:Trans-Neptunian objects in a 2:5 resonance 1999 DE9 1999 DE9 19990220