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118439 (1999 UT20)
Classification: Main-belt Asteroid          SPK-ID: 2118439
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1513355186839339 3.8841e-08  
a 3.057955885783361 2.5577e-08 au
q 2.595178545695747 1.1951e-07 au
i 2.383342207615832 3.7907e-06 deg
node 90.22501167350234 0.00018017 deg
peri 191.3930786186564 0.00018337 deg
M 26.41452617213352 3.1143e-05 deg
tp 2458857.187004146535
(2020-Jan-08.68700415)
0.00016986 TDB
period 1953.193412254962
5.35
2.4505e-05
6.709e-08
d
yr
n .1843135440357542 2.3124e-09 deg/d
Q 3.520733225870975 2.9448e-08 au
  Orbit Determination Parameters
   # obs. used (total)      328  
   data-arc span      7700 days (21.08 yr)  
   first obs. used      1999-10-16  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55718  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:45:14  

Additional Information
 Earth MOID = 1.57876 au 
 Jupiter MOID = 1.62065 au 
 T_jup = 3.216 
[ 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 16.04   n/a E2021B55  

118439 (1999 UT20)          Discovered 1999-Oct-31 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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