(26375) 1999 DE9 - Asteroid - astro.wikisort.org

astro.wikisort.org - Asteroid

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

References

Marc W. Buie (March 14, 2008). "Orbit Fit and Astrometric record for 26375". SwRI (Space Science Department). Retrieved September 24, 2008.
"JPL Small-Body Database Browser: 26375 (1999 DE9)". NASA/Jet Propulsion Laboratory. Retrieved April 5, 2016.
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

(26375) 1999 DE9 at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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

Small Solar System bodies

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Dwarf planets

List of possible dwarf planets
Former dwarf planets
- Phoebe
- Triton
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Planemo

Asteroid belt

Consensus	Ceres
Possible	Hygiea Interamnia

Centaurs

Possible	Chariklo Chiron 2010 TY₅₃

Plutinos

Consensus	Orcus Pluto
Possible	Huya Ixion 2001 QF₂₉₈ 2002 VR₁₂₈ 2002 XV₉₃ 2003 AZ₈₄ 2003 UZ₄₁₃ 2003 VS₂ 2007 JH₄₃ 2017 OF69

Twotinos

Possible	2002 WC₁₉

Cubewanos and
other Kuiper belt

Consensus	Haumea Makemake Quaoar
Possible (cubewanos)	Chaos Salacia Varda Varuna 1998 SN₁₆₅ 2002 AW₁₉₇ 2002 CY248 2002 KX₁₄ 2002 MS₄ 2002 UX₂₅ 2003 QW₉₀ 2004 GV₉ 2004 NT₃₃ 2004 PF₁₁₅ 2004 TY₃₆₄ 2004 UX₁₀ 2005 RN₄₃ 2005 UQ₅₁₃ 2007 JJ₄₃ 2010 FX86
Possible (other)	1999 CD₁₅₈ 1999 DE₉ 2000 YW₁₃₄ 2002 XW₉₃ 2010 JO₁₇₉ 2010 VK₂₀₁ 2011 FW62 2011 GM₂₇ 2013 FZ₂₇ 2014 UM₃₃ 2015 AM₂₈₁ 2015 RR₂₄₅

Scattered disc

Consensus	Eris Gonggong
Possible	Gǃkúnǁʼhòmdímà Dziewanna 1996 GQ₂₁ 1996 TL₆₆ 2001 UR₁₆₃ 2002 TC₃₀₂ 2004 XA₁₉₂ 2005 QU₁₈₂ 2005 RM₄₃ 2006 QH181 2008 OG₁₉ 2010 KZ39 2010 RE₆₄ 2010 RF₄₃ 2010 TJ 2010 VZ₉₈ 2013 FY₂₇ 2014 AN₅₅ 2014 WK₅₀₉ 2018 AG37 2018 VG18 2021 DR15 2021 LL37

Detached objects

Possible	2003 FY₁₂₈ 2003 QX₁₁₃ 2004 XR₁₉₀ 2005 TB₁₉₀ 2007 JJ₄₃ 2008 ST₂₉₁

Sednoids

Consensus	Sedna
Possible	2012 VP113

Category

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На других языках

[de] (26375) 1999 DE9

(26375) 1999 DE9 ist ein großes transneptunisches Objekt im Kuipergürtel, das bahndynamisch als resonantes Kuipergürtel-Objekt (2:5–Resonanz) oder als Scattered Disk Object (SDO) eingestuft wird. Aufgrund seiner Größe ist der Asteroid ein Zwergplanetenkandidat.

- [en] (26375) 1999 DE9

[ru] (26375) 1999 DE9

(26375) 1999 DE9 объект Солнечной системы, расположенный за орбитой Нептуна. Он был открыт в 1999 году Чадом Трухильо и Джейн Х. Лю.

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