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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2954054067141101 1.7386e-07  
a 2.57725020556163 5.2302e-08 au
q 1.815916560383673 4.8275e-07 au
i 4.472365121313093 6.1221e-06 deg
node 248.9141272695477 0.00012219 deg
peri 132.6538842452476 0.00012886 deg
M 344.8143626109389 5.047e-05 deg
tp 2459264.247598086381
(2021-Feb-18.74759809)
0.00021374 TDB
period 1511.239516862727
4.14
4.6003e-05
1.259e-07
d
yr
n .2382150519378593 7.2514e-09 deg/d
Q 3.338583850739588 6.7753e-08 au
  Orbit Determination Parameters
   # obs. used (total)      152  
   data-arc span      5845 days (16.00 yr)  
   first obs. used      2004-12-02  
   last obs. used      2020-12-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60893  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 16:19:56  

Additional Information
 Earth MOID = .821525 au 
 Jupiter MOID = 2.14603 au 
 T_jup = 3.360 
[ 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 17.31   n/a E2021B25  

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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