(26375) 1999 DE9

(26375) 1999 DE₉
Discovery
Discovered by	Chadwick A. Trujillo and Jane X. Luu
Discovery date	20 February 1999
Designations
MPC designation	(26375) 1999 DE₉
Minor planet category	TNO 2:5 resonance^[1]
Orbital characteristics^[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 2
Observation arc	6619 days (18.12 yr)
Aphelion	79.663 AU (11.9174 Tm)
Perihelion	32.342 AU (4.8383 Tm)
Semi-major axis	56.002 AU (8.3778 Tm)
Eccentricity	0.42249
Orbital period	419.10 yr (153075 d)
Average orbital speed	3.81 km/s
Mean anomaly	25.385°
Mean motion	0° 0^m 8.466^s / day
Inclination	7.6076°
Longitude of ascending node	322.909°
Argument of perihelion	160.236°
Earth MOID	31.3582 AU (4.69112 Tm)
Jupiter MOID	27.062 AU (4.0484 Tm)
Physical characteristics
Dimensions	461 ± 45 km^[3]
Rotation period	24 h (1.0 d)
Geometric albedo	0.06–0.08^[3]
Temperature	≈37 K
Absolute magnitude (H)	5.0

(26375) 1999 DE₉ (also written (26375) 1999 DE9) is a trans-Neptunian object. Light-curve-amplitude analysis shows only small deviations, suggesting (26375) 1999 DE₉ is a spheroid with small albedo spots.^[4] Measurements by the Spitzer Space Telescope estimate that it is 461 ± 45 km in diameter.^[3] It was discovered in 1999 by Chad Trujillo and Jane X. Luu. It is possibly a dwarf planet.^[5]

(26375) 1999 DE₉ orbit is in 2:5 resonance with Neptune's.^[1] Spectral analysis has shown traces of ice.^[6]

References

1 2 Marc W. Buie (2008-03-14). "Orbit Fit and Astrometric record for 26375". SwRI (Space Science Department). Retrieved 2008-09-24.
↑ "JPL Small-Body Database Browser: 26375 (1999 DE9)". NASA/Jet Propulsion Laboratory. Retrieved 5 April 2016.
1 2 3 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
↑ 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
↑ Icy Dwarf Planets and TNOs
↑ Fig 3 for 1999 DE9

External links

Orbital simulation from JPL (Java) / Horizons Ephemeris
(26375) 1999 DE9 at the JPL Small-Body Database

Discovery · Orbit diagram · Orbital elements · Physical parameters

Minor planets navigator

(26374) 1999 CP106 (26375) 1999 DE₉ 26376 Roborosa

Small Solar System bodies

Minor planets

Designation Groups Moons Meanings of names Pronunciation of names

Asteroids	Aten asteroid Families Jupiter Trojans Main-belt Near-Earth Spectral types

Distant minor planets	Centaurs Damocloids Neptune trojans Trans-Neptunian objects Detached Kuiper belt Oort cloud Scattered disc

Comets

Meteoroids

Lists / categories

Asteroid groups and families
Asteroid moons
Binary asteroids
Minor planets

The Solar System

Planets	Terrestrial planets Mercury Venus Earth Mars Giant planets Jupiter Saturn Uranus Neptune Dwarf planets Ceres Pluto Haumea Makemake Eris

Rings	Jovian Saturnian (Rhean) Charikloan Chironean Uranian Neptunian

Moons	1 Terrestrial (Moon) Other near-Earth objects 2 Martian Phobos Deimos 67 Jovian Ganymede Callisto Io Europa all 62 Saturnian Titan Rhea Iapetus Dione Tethys Enceladus Mimas Hyperion Phoebe all 27 Uranian Titania Oberon Umbriel Ariel Miranda all 14 Neptunian Triton Proteus Nereid all 5 Plutonian Charon Nix Hydra Kerberos Styx 2 Haumean Hiʻiaka Namaka 1 Makemakean (S/2015 (136472) 1) 1 Eridian (Dysnomia)

Lists	Solar System objects By size By discovery date Minor planets Gravitationally rounded objects Possible dwarf planets Natural satellites Comets

Small Solar System bodies	Meteoroids Minor planets moons Comets Damocloids Mercury-crossers Venus-crossers Venus trojans Near-Earth objects Earth-crossers Earth trojans Mars-crossers Mars trojans Asteroid belt Asteroids first discovered: Ceres Pallas Juno Vesta Notable asteroids Kirkwood gap Main-belt comets Jupiter trojans Jupiter-crossers Centaurs Saturn-crossers Uranus trojans Uranus-crossers Neptune trojans Cis-Neptunian objects Trans-Neptunian objects Neptune-crossers Plutoids Kuiper belt Plutinos Cubewanos Scattered disc Detached objects Sednoids Hills cloud Oort cloud

Hypothetical objects	Vulcan Vulcanoids Phaeton Planet V Theia Fifth giant Planets beyond Neptune Tyche Nemesis Planet Nine

Portals	Solar System Astronomy Earth sciences Mars Jupiter Uranus Cosmology

Solar System → Local Interstellar Cloud → Local Bubble → Gould Belt → Orion Arm → Milky Way → Milky Way subgroup → Local Group → Virgo Supercluster → Laniakea Supercluster → Observable universe → Universe
Each arrow (→) may be read as "within" or "part of".

This article is issued from Wikipedia - version of the Friday, April 08, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.