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JPL Small-Body Database Browser
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393724 (2004 XB21)
Classification: Main-belt Asteroid          SPK-ID: 2393724
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1306649949088273 7.0871e-07  
a 2.546388284340293 8.4084e-08 au
q 2.213664472131071 1.874e-06 au
i 13.54875318187307 1.8462e-05 deg
node 255.5598746424766 5.2687e-05 deg
peri 181.1122453080655 0.00033564 deg
M 288.8299275016267 0.00032771 deg
tp 2459293.913624055496
(2021-Mar-20.41362406)
0.0013649 TDB
period 1484.175875504311
4.06
7.3513e-05
2.013e-07
d
yr
n .242558854339062 1.2014e-08 deg/d
Q 2.879112096549515 9.507e-08 au
  Orbit Determination Parameters
   # obs. used (total)      181  
   data-arc span      4443 days (12.16 yr)  
   first obs. used      2004-11-20  
   last obs. used      2017-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62854  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 21:10:42  

Additional Information
 Earth MOID = 1.22896 au 
 Jupiter MOID = 2.38924 au 
 T_jup = 3.392 
[ 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 16.6   n/a MPO397435  

393724 (2004 XB21)          Discovered 2004-Dec-08 by LINEAR at Socorro
Reference: Last Updated: 2014-05-15

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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