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118442 (1999 UM54)
Classification: Main-belt Asteroid          SPK-ID: 2118442
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08489287698986893 5.1055e-08  
a 3.177916699654407 3.3479e-08 au
q 2.908134208186596 1.573e-07 au
i 9.762097347604263 7.1456e-06 deg
node 191.2542150355394 3.198e-05 deg
peri 287.9185794384005 5.2958e-05 deg
M 126.0258387381419 4.3801e-05 deg
tp 2458276.115270790888
(2018-Jun-06.61527079)
0.00024942 TDB
period 2069.2463158855
5.67
3.2699e-05
8.952e-08
d
yr
n .1739763880386294 2.7492e-09 deg/d
Q 3.447699191122219 3.6321e-08 au
  Orbit Determination Parameters
   # obs. used (total)      249  
   data-arc span      8955 days (24.52 yr)  
   first obs. used      1994-10-04  
   last obs. used      2019-04-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62103  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 11:21:38  

Additional Information
 Earth MOID = 1.94274 au 
 Jupiter MOID = 1.67235 au 
 T_jup = 3.172 
[ 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 15.6   n/a MPO436569  

118442 (1999 UM54)          Discovered 1999-Oct-19 by Spacewatch at Kitt Peak
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

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