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JPL Small-Body Database Browser
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13831 (1999 XD8)
Classification: Main-belt Asteroid          SPK-ID: 2013831
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | 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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1689667516453744 4.3903e-08  
a 2.305287723878365 8.8759e-09 au
q 1.915770745566679 1.0364e-07 au
i 6.025939846093623 3.5306e-06 deg
node 108.3141083215928 3.8307e-05 deg
peri 252.9140519733045 3.9427e-05 deg
M 259.226036379711 9.9544e-06 deg
tp 2458958.375504239543
(2020-Apr-18.87550424)
3.5922e-05 TDB
period 1278.457023003279
3.50
7.3835e-06
2.021e-08
d
yr
n .2815894422123852 1.6263e-09 deg/d
Q 2.694804702190051 1.0376e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1469  
   data-arc span      13873 days (37.98 yr)  
   first obs. used      1981-09-03  
   last obs. used      2019-08-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48883  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:16:08  

Additional Information
 Earth MOID = .921903 au 
 Jupiter MOID = 2.76411 au 
 T_jup = 3.562 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6   n/a MPO492905  

13831 (1999 XD8)          Discovered 1999-Dec-03 by Kobayashi, T. at Oizumi
Reference: 20000222/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XD8 = 1981 RV7 = 1991 LN4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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