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71017 (1999 XW55)
Classification: Main-belt Asteroid          SPK-ID: 2071017
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08595457499872072 5.3724e-08  
a 2.767436092759707 1.6284e-08 au
q 2.529562299570426 1.5017e-07 au
i .4513154269981977 5.0547e-06 deg
node 334.8966944468098 0.00058889 deg
peri 50.10925939489583 0.0005894 deg
M 198.1230256919758 2.5246e-05 deg
tp 2459756.631629710903
(2022-Jun-26.13162971)
0.0001208 TDB
period 1681.569524384368
4.60
1.4842e-05
4.064e-08
d
yr
n .2140857067041566 1.8896e-09 deg/d
Q 3.005309885948988 1.7684e-08 au
  Orbit Determination Parameters
   # obs. used (total)      544  
   data-arc span      9390 days (25.71 yr)  
   first obs. used      1994-10-08  
   last obs. used      2020-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52139  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:58:09  

Additional Information
 Earth MOID = 1.53323 au 
 Jupiter MOID = 2.39133 au 
 T_jup = 3.333 
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Orbital Elements at Epoch 2457354.5 (2015-Nov-28.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08561892053419665 5.3587e-08  
q 2.530691036277771 1.4962e-07 au
tp 2458078.074120257617
(2017-Nov-20.57412026)
0.00011567 TDB
node 334.9397764711501 0.00058865 deg
peri 50.81667775859675 0.00058917 deg
i .4514216089191766 5.0552e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      544  
   data-arc span      9390 days (25.71 yr)  
   first obs. used      1994-10-08  
   last obs. used      2020-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52139  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:58:09  

Additional Information
 Jupiter MOID = 2.39133 au 
 T_jup = 3.333 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.871570992873671E-15 -7.977962254178754E-15 -9.222657097178115E-13 1.627542914493382E-14 -2.777340476006932E-13 1.372505946475219E-16
q -7.977962254178754E-15 2.238586687856438E-14 3.129081466268177E-12 -5.246356210616676E-14 8.770128132620649E-13 -3.873685389144342E-16
tp -9.222657097178115E-13 3.129081466268177E-12 1.337943492644137E-8 -4.618919375888341E-11 2.871202739378245E-9 -2.819986712416644E-13
node 1.627542914493382E-14 -5.246356210616676E-14 -4.618919375888341E-11 3.46508304217643E-7 -3.465073325477578E-7 1.007525159178675E-9
peri -2.777340476006932E-13 8.770128132620649E-13 2.871202739378245E-9 -3.465073325477578E-7 3.471173614610727E-7 -1.007558571904567E-9
i 1.372505946475219E-16 -3.873685389144342E-16 -2.819986712416644E-13 1.007525159178675E-9 -1.007558571904567E-9 2.555478863705972E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO436279  

71017 (1999 XW55)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XW55 = 1998 ME5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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