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JPL Small-Body Database Browser
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439877 (1999 XM141)
Classification: Apollo [NEO, PHA]          SPK-ID: 2439877
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3693039981330402 1.1992e-07  
a 1.236346112538861 3.5354e-09 au
q .7797585501020181 1.4754e-07 au
i 21.62069425709083 2.402e-05 deg
node 73.0217283911705 2.0311e-05 deg
peri 105.7177839241582 2.9841e-05 deg
M 270.5356196121052 2.5111e-05 deg
tp 2459125.283219330725
(2020-Oct-02.78321933)
3.5378e-05 TDB
period 502.1211655889263
1.37
2.1538e-06
5.897e-09
d
yr
n .7169584249207347 3.0753e-09 deg/d
Q 1.692933674975704 4.841e-09 au
  Orbit Determination Parameters
   # obs. used (total)      137  
   data-arc span      5708 days (15.63 yr)  
   first obs. used      1999-12-13  
   last obs. used      2015-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4909  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:19:22  

Additional Information
 Earth MOID = .033321 au 
 Jupiter MOID = 3.39983 au 
 T_jup = 5.051 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 19.5   n/a MPO189190  

439877 (1999 XM141)          Discovered 1999-Dec-13 by LINEAR at Socorro
Reference: Last Updated: 2015-09-02

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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