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26375 (1999 DE9)
Classification: TransNeptunian Object          SPK-ID: 2026375
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4138331073624185 1.0922e-05  
a 55.01825157978817 0.0013525 au
q 32.24987756687714 0.00020783 au
i 7.637147976831601 2.3601e-05 deg
node 323.1348964327916 0.00015335 deg
peri 158.9949346944894 0.0011949 deg
M 31.36033840941953 0.0015603 deg
tp 2446411.652784930518
(1985-Dec-12.15278493)
0.16931 TDB
period 149059.137576811
408.10
5.4964
0.01505
d
yr
n .002415148818464686 8.9056e-08 deg/d
Q 77.7866255926992 0.0019122 au
  Orbit Determination Parameters
   # obs. used (total)      468  
   data-arc span      11423 days (31.27 yr)  
   first obs. used      1990-01-29  
   last obs. used      2021-05-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      2  
   norm. resid. RMS      .45352  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 19:17:09  

Additional Information
 Earth MOID = 31.2673 au 
 Jupiter MOID = 26.9637 au 
 T_jup = 5.962 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 4.94   n/a MPCxxxxx  
rotation period rot_per 24. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 [lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.]

26375 (1999 DE9)          Discovered 1999-Feb-20 by Trujillo, C. A., Luu, J. at Kitt Peak
Reference: 20010705/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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