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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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08595457926890201 5.61e-08  
a 2.767436093454673 1.653e-08 au
q 2.529562288388203 1.5596e-07 au
i .4513178758054329 5.5078e-06 deg
node 334.8966737863226 0.00058951 deg
peri 50.1092774088986 0.00059011 deg
M 198.1230277905311 2.6606e-05 deg
tp 2459756.631620193318
(2022-Jun-26.13162019)
0.00012665 TDB
period 1681.569525017789
4.60
1.5066e-05
4.125e-08
d
yr
n .2140857066235139 1.9181e-09 deg/d
Q 3.005309898521144 1.7951e-08 au
  Orbit Determination Parameters
   # obs. used (total)      519  
   data-arc span      9333 days (25.55 yr)  
   first obs. used      1994-10-08  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52584  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 13:42:31  

Additional Information
 Earth MOID = 1.53323 au 
 Jupiter MOID = 2.39133 au 
 T_jup = 3.333 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457144.5 (2015-May-02.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08535489713433758 5.5838e-08  
q 2.532048360960633 1.5501e-07 au
tp 2456396.395878120220
(2013-Apr-13.89587812)
0.0001206 TDB
node 334.9616260756894 0.00058894 deg
peri 50.86798046895853 0.00058956 deg
i .451558098108425 5.5084e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      519  
   data-arc span      9333 days (25.55 yr)  
   first obs. used      1994-10-08  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52584  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 13:42:31  

Additional Information
 Jupiter MOID = 2.39133 au 
 T_jup = 3.333 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.117876642607223E-15 -8.614286244732869E-15 -1.599088661921544E-12 1.925908524901294E-14 -4.520344125179462E-13 2.691403112482465E-17
q -8.614286244732869E-15 2.402873575839324E-14 4.642599909109891E-12 -5.856037218279188E-14 1.323244259751864E-12 -9.526067033864308E-17
tp -1.599088661921544E-12 4.642599909109891E-12 1.454319395976041E-8 -4.685581321803024E-11 3.275123621872334E-9 -2.848086769950016E-13
node 1.925908524901294E-14 -5.856037218279188E-14 -4.685581321803024E-11 3.468487580907101E-7 -3.468495372126221E-7 9.586245287195706E-10
peri -4.520344125179462E-13 1.323244259751864E-12 3.275123621872334E-9 -3.468495372126221E-7 3.475826516366936E-7 -9.586599329839198E-10
i 2.691403112482465E-17 -9.526067033864308E-17 -2.848086769950016E-13 9.586245287195706E-10 -9.586599329839198E-10 3.034198909423129E-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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