| 词条 | (26375) 1999 DE9 |
| 释义 |
| minorplanet=yes | background=#C2E0FF | name={{mp|(26375) 1999 DE|9}} | discoverer=Chadwick A. Trujillo and Jane X. Luu | discovered=20 February 1999 | mpc_name={{mp|(26375) 1999 DE|9}} | alt_names= | mp_category=TNO 2:5 resonance[1] | epoch=13 January 2016 (JD 2457400.5) | semimajor={{Convert|56.002|AU|Tm|abbr=on}} | perihelion={{Convert|32.342|AU|Tm|abbr=on}} | aphelion={{Convert|79.663|AU|Tm|abbr=on|lk=on}} | eccentricity=0.42249 | period=419.10 yr (153075 d) | inclination=7.6076° | asc_node=322.909° | arg_peri=160.236° | mean_anomaly=25.385° | avg_speed=3.81 km/s | dimensions=461 ± 45 km[2] | mass= | density= | gravity= | escape_velocity= | sidereal_day= | spectral_type= | abs_magnitude=5.0 | albedo=0.06–0.08[2] | single_temperature=≈37 K | mean_motion={{Deg2DMS|0.0023518|sup=ms}} / day | orbit_ref=[3] | rotation={{Convert|24|h|d|abbr=on|lk=on}} | observation_arc=6619 days (18.12 yr) | uncertainty=2 | moid={{Convert|31.3582|AU|Tm|abbr=on}} | jupiter_moid={{Convert|27.062|AU|Tm|abbr=on}} }}{{mp|(26375) 1999 DE|9}} (also written (26375) 1999 DE9) is a trans-Neptunian object. Light-curve-amplitude analysis shows only small deviations, suggesting {{mp|(26375) 1999 DE|9}} is a spheroid with small albedo spots.[4] Measurements by the Spitzer Space Telescope estimate that it is 461 ± 45 km in diameter.[2] It was discovered in 1999 by Chad Trujillo and Jane X. Luu. It is possibly a dwarf planet.[5]{{mp|(26375) 1999 DE|9}} orbit is in 2:5 resonance with Neptune's.[1] Spectral analysis has shown traces of ice.[6] References1. ^1 {{cite web |author=Marc W. Buie |author-link=Marc W. Buie |date=2008-03-14 |title=Orbit Fit and Astrometric record for 26375 |publisher=SwRI (Space Science Department) |url=http://www.boulder.swri.edu/~buie/kbo/astrom/26375.html |accessdate=2008-09-24}} 2. ^1 2 Stansberry, Grundy, Brown, Spencer, Trilling, Cruikshank, Luc Margot Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope (2007) {{arxiv|astro-ph/0702538}} 3. ^{{cite web |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=26375;cad=1 |title=JPL Small-Body Database Browser: 26375 (1999 DE9) |publisher=NASA/Jet Propulsion Laboratory |access-date=5 April 2016}} 4. ^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 5. ^Icy Dwarf Planets and TNOs 6. ^Fig 3 for 1999 DE9 External links
5 : 2:5 resonance|Discoveries by Chad Trujillo|Discoveries by Jane Luu|Possible dwarf planets|Astronomical objects discovered in 1999 |
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