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13955 (1990 UA2)
Classification: Main-belt Asteroid          SPK-ID: 2013955
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2685790795666292 4.7831e-08  
a 2.560351748264228 1.2404e-08 au
q 1.872694832348612 1.1698e-07 au
i 4.32925631535175 5.9004e-06 deg
node 113.509377211711 4.9403e-05 deg
peri 280.6844443953371 5.1152e-05 deg
M 78.93492353236175 1.3234e-05 deg
tp 2458672.393699782196
(2019-Jul-07.89369978)
5.423e-05 TDB
period 1496.400614488252
4.10
1.0874e-05
2.977e-08
d
yr
n .2405772869340306 1.7483e-09 deg/d
Q 3.248008664179844 1.5736e-08 au
  Orbit Determination Parameters
   # obs. used (total)      887  
   data-arc span      10698 days (29.29 yr)  
   first obs. used      1990-10-21  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53734  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:48:17  

Additional Information
 Earth MOID = .885124 au 
 Jupiter MOID = 2.20026 au 
 T_jup = 3.380 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456516.5 (2013-Aug-12.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2672695723382033 4.771e-08  
q 1.876691494268948 1.165e-07 au
tp 2457171.127286649200
(2015-May-28.62728665)
5.2381e-05 TDB
node 113.7621950736057 4.9414e-05 deg
peri 279.7947719506232 5.1211e-05 deg
i 4.328337070449964 5.9009e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      887  
   data-arc span      10698 days (29.29 yr)  
   first obs. used      1990-10-21  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53734  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:48:17  

Additional Information
 Jupiter MOID = 2.20026 au 
 T_jup = 3.380 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.276241402905804E-15 -5.548193353437326E-15 5.793345105025526E-13 -1.552196155402769E-14 -1.169118552452552E-14 -5.024927936210696E-16
q -5.548193353437326E-15 1.357201676790173E-14 -1.403744952128983E-12 3.7357985070762E-14 2.546761419339329E-14 1.155820134145259E-15
tp 5.793345105025526E-13 -1.403744952128983E-12 2.743764513729108E-9 -4.108974811414212E-11 6.927779124634702E-10 -2.813851943927978E-12
node -1.552196155402769E-14 3.7357985070762E-14 -4.108974811414212E-11 2.441737036938358E-9 -2.443014997617025E-9 4.077966532027058E-11
peri -1.169118552452552E-14 2.546761419339329E-14 6.927779124634702E-10 -2.443014997617025E-9 2.622539239866535E-9 -4.130687944451834E-11
i -5.024927936210696E-16 1.155820134145259E-15 -2.813851943927978E-12 4.077966532027058E-11 -4.130687944451834E-11 3.482059506071481E-11

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 15.3   n/a MPO452367  

13955 (1990 UA2)          Discovered 1990-Oct-21 by Urata, T. at Oohira
Reference: 20000320/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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