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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08700319750277026 4.3703e-08  
a 2.555150793941507 9.1604e-09 au
q 2.332844504766854 1.1351e-07 au
i 2.241762619038247 4.8285e-06 deg
node 329.3737779604965 9.0768e-05 deg
peri 25.1600234640523 9.3912e-05 deg
M 129.8200690652222 2.3431e-05 deg
tp 2458858.524416766702
(2020-Jan-10.02441677)		 9.6605e-05 TDB
period 1491.843374899808
4.08		 8.0225e-06
2.196e-08		 d
yr
n .241312195406691 1.2977e-09 deg/d
Q 2.77745708311616 9.9573e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1441  
   data-arc span      8851 days (24.23 yr)  
   first obs. used      1997-02-08  
   last obs. used      2021-05-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53257  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:14:35  

Additional Information
 Earth MOID = 1.32704 au 
 Jupiter MOID = 2.57974 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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