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103157 (1999 XU223)
Classification: Main-belt Asteroid          SPK-ID: 2103157
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1406547993986633 5.2561e-08  
a 2.640485129296485 1.4421e-08 au
q 2.269088223120134 1.4569e-07 au
i 8.53118831396548 4.8351e-06 deg
node 282.1461806994016 3.4818e-05 deg
peri 165.0654921637726 4.1027e-05 deg
M 332.8901787215073 1.941e-05 deg
tp 2459318.517977986968
(2021-Apr-14.01797799)
8.455e-05 TDB
period 1567.198530704236
4.29
1.2839e-05
3.515e-08
d
yr
n .2297092505811822 1.8819e-09 deg/d
Q 3.011882035472836 1.645e-08 au
  Orbit Determination Parameters
   # obs. used (total)      656  
   data-arc span      7757 days (21.24 yr)  
   first obs. used      1999-11-16  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50979  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:35:34  

Additional Information
 Earth MOID = 1.28641 au 
 Jupiter MOID = 2.18854 au 
 T_jup = 3.366 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457438.5 (2016-Feb-20.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1392105773003959 5.1949e-08  
q 2.274227563671016 1.4374e-07 au
tp 2457745.429316402800
(2016-Dec-22.92931640)
8.6836e-05 TDB
node 282.2691862214031 3.4932e-05 deg
peri 163.9486818736622 4.1356e-05 deg
i 8.51345567627024 4.8275e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      656  
   data-arc span      7757 days (21.24 yr)  
   first obs. used      1999-11-16  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50979  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:35:34  

Additional Information
 Jupiter MOID = 2.18854 au 
 T_jup = 3.366 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.698665487124425E-15 -7.446439821224433E-15 2.366592827268962E-13 -3.985387322017591E-15 1.757793225633768E-13 -5.111174752557693E-15
q -7.446439821224433E-15 2.065978126652709E-14 -7.011297713976109E-13 1.320712848000834E-14 -5.05922308646137E-13 1.432472470421319E-14
tp 2.366592827268962E-13 -7.011297713976109E-13 7.540404550741413E-9 1.950539982479003E-11 1.938927541709376E-9 9.842050517968411E-12
node -3.985387322017591E-15 1.320712848000834E-14 1.950539982479003E-11 1.22025894016256E-9 -1.202015229172507E-9 -1.799634344543947E-11
peri 1.757793225633768E-13 -5.05922308646137E-13 1.938927541709376E-9 -1.202015229172507E-9 1.710289807457091E-9 2.008366405785573E-11
i -5.111174752557693E-15 1.432472470421319E-14 9.842050517968411E-12 -1.799634344543947E-11 2.008366405785573E-11 2.330445302640655E-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 15.46   n/a E2021B55  

103157 (1999 XU223)          Discovered 1999-Dec-13 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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