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JPL Small-Body Database Browser
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393955 (2005 UJ221)
Classification: Main-belt Asteroid          SPK-ID: 2393955
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06077536695676448 1.0833e-07  
a 2.314687402124203 2.2631e-08 au
q 2.174011425869905 2.5736e-07 au
i 6.707162293235309 1.0647e-05 deg
node 17.46559596155529 5.024e-05 deg
peri 172.6285246810271 7.3717e-05 deg
M 265.7195347885198 5.9029e-05 deg
tp 2459337.365212830055
(2021-May-02.86521283)
0.00021426 TDB
period 1286.284240821213
3.52
1.8864e-05
5.165e-08
d
yr
n .2798759314427752 4.1045e-09 deg/d
Q 2.455363378378502 2.4006e-08 au
  Orbit Determination Parameters
   # obs. used (total)      98  
   data-arc span      7153 days (19.58 yr)  
   first obs. used      2000-03-27  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .508  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 04:53:14  

Additional Information
 Earth MOID = 1.1737 au 
 Jupiter MOID = 2.4997 au 
 T_jup = 3.570 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457144.5 (2015-May-02.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06049251366664805 1.0841e-07  
q 2.174665626191632 2.5737e-07 au
tp 2456766.669860363643
(2014-Apr-19.16986036)
0.0001926 TDB
node 17.48985339487162 5.0205e-05 deg
peri 173.0969561056834 7.4094e-05 deg
i 6.710219299280863 1.0651e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      98  
   data-arc span      7153 days (19.58 yr)  
   first obs. used      2000-03-27  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .508  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 04:53:14  

Additional Information
 Jupiter MOID = 2.4997 au 
 T_jup = 3.570 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.175221472477677E-14 -2.78125314541617E-14 -8.326437864029593E-12 -2.737219679030879E-14 -2.374051120650478E-12 3.816873028264738E-14
q -2.78125314541617E-14 6.623868644611267E-14 2.159283077046793E-11 6.271421851007339E-14 6.167831616161322E-12 -8.978489312294479E-14
tp -8.326437864029593E-12 2.159283077046793E-11 3.70959444542521E-8 -1.675672645417013E-11 1.052033604314392E-8 -3.468645807301904E-11
node -2.737219679030879E-14 6.271421851007339E-14 -1.675672645417013E-11 2.520573056314375E-9 -2.506737939845275E-9 -2.397544581911387E-10
peri -2.374051120650478E-12 6.167831616161322E-12 1.052033604314392E-8 -2.506737939845275E-9 5.489902878774972E-9 2.284672100960256E-10
i 3.816873028264738E-14 -8.978489312294479E-14 -3.468645807301904E-11 -2.397544581911387E-10 2.284672100960256E-10 1.134482282419783E-10

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 17.7   n/a MPO413429  

393955 (2005 UJ221)          Discovered 2005-Oct-25 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-05-15

[ show close-approach data ]
Alternate Designations
 2005 UJ221 = 2000 FT65 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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