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442409 (2011 UJ81)
Classification: Main-belt Asteroid          SPK-ID: 2442409
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09507725445391942 5.4422e-08  
a 2.869175708011246 3.1928e-08 au
q 2.596382359147657 1.6755e-07 au
i 2.883799021502769 4.5865e-06 deg
node 63.34857832026514 0.00011488 deg
peri 258.9443735888694 0.00011813 deg
M 348.9232545280597 2.5886e-05 deg
tp 2459055.119009524317
(2020-Jul-24.61900952)
0.00012779 TDB
period 1775.1462718507
4.86
2.963e-05
8.112e-08
d
yr
n .2028001893188653 3.3851e-09 deg/d
Q 3.141969056874836 3.4963e-08 au
  Orbit Determination Parameters
   # obs. used (total)      196  
   data-arc span      6854 days (18.77 yr)  
   first obs. used      2001-10-23  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61441  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-26 00:52:29  

Additional Information
 Earth MOID = 1.58578 au 
 Jupiter MOID = 2.12076 au 
 T_jup = 3.290 
[ 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 16.8   n/a MPO437720  

442409 (2011 UJ81)          Discovered 2006-Sep-30 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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