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338847 (2003 XZ21)
Classification: Mars-crossing Asteroid          SPK-ID: 2338847
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3236571014288198 9.6121e-08  
a 2.107204510430801 1.4851e-08 au
q 1.425192806467033 2.0888e-07 au
i 5.099300629742408 3.2991e-06 deg
node 122.3979465935451 4.9841e-05 deg
peri 193.3578678052371 5.0965e-05 deg
M 224.7928698146241 1.2143e-05 deg
tp 2459420.119393554138
(2021-Jul-24.61939355)
3.625e-05 TDB
period 1117.270823457126
3.06
1.1811e-05
3.234e-08
d
yr
n .3222137304955898 3.4062e-09 deg/d
Q 2.78921621439457 1.9657e-08 au
  Orbit Determination Parameters
   # obs. used (total)      614  
   data-arc span      5894 days (16.14 yr)  
   first obs. used      2003-12-14  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46035  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 22:08:40  

Additional Information
 Earth MOID = .412111 au 
 Jupiter MOID = 2.52297 au 
 T_jup = 3.669 
[ 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 16.8   n/a MPO353079  

338847 (2003 XZ21)          Discovered 2003-Dec-14 by NEAT at Palomar
Reference: 20121029/Numbers.arcLast Updated: 2012-11-08

[ show close-approach data ]
Alternate Designations
 2003 XZ21 = 2008 CH92 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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