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21879 (1999 UH13)
Classification: Main-belt Asteroid          SPK-ID: 2021879
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08695858784159095 4.416e-08  
a 2.554846564838747 9.1692e-09 au
q 2.33268071540843 1.1474e-07 au
i 2.241785061544278 4.8462e-06 deg
node 329.3735424366233 9.0985e-05 deg
peri 25.06871718170905 9.4124e-05 deg
M 82.62126322389089 2.3392e-05 deg
tp 2458858.177857642929
(2020-Jan-09.67785764)
9.6613e-05 TDB
period 1491.576943269373
4.08
8.0298e-06
2.198e-08
d
yr
n .2413552995871064 1.2993e-09 deg/d
Q 2.777012414269064 9.9666e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1423  
   data-arc span      8744 days (23.94 yr)  
   first obs. used      1997-02-08  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53336  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:54:52  

Additional Information
 Earth MOID = 1.32594 au 
 Jupiter MOID = 2.58079 au 
 T_jup = 3.432 
[ 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 14.7   n/a MPO449113  

21879 (1999 UH13)          Discovered 1999-Oct-29 by CSS at Catalina
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 UH13 = 1997 EJ38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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