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469674 (2004 XK21)
Classification: Main-belt Asteroid          SPK-ID: 2469674
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2957984489371294 2.0006e-07  
a 2.578556248632323 6.3193e-08 au
q 1.815823309789739 5.5843e-07 au
i 4.473345970258944 6.248e-06 deg
node 248.9352427890268 0.00012262 deg
peri 132.5990734885964 0.00013152 deg
M 297.2472022771862 5.8017e-05 deg
tp 2459264.129455868938
(2021-Feb-18.62945587)
0.00025321 TDB
period 1512.38841225902
4.14
5.5596e-05
1.522e-07
d
yr
n .2380340903711873 8.7503e-09 deg/d
Q 3.341289187474906 8.1885e-08 au
  Orbit Determination Parameters
   # obs. used (total)      149  
   data-arc span      5706 days (15.62 yr)  
   first obs. used      2004-12-02  
   last obs. used      2020-07-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6071  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 04:18:57  

Additional Information
 Earth MOID = .822714 au 
 Jupiter MOID = 2.14231 au 
 T_jup = 3.359 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.3   n/a MPO437769  

469674 (2004 XK21)          Discovered 2004-Dec-08 by LINEAR at Socorro
Reference: Last Updated: 2016-08-22

Alternate Designations
 2004 XK21 = 2008 US203 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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