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66831 (1999 UJ44)
Classification: Main-belt Asteroid          SPK-ID: 2066831
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07435116005997028 5.5851e-08  
a 2.760390884427323 1.7815e-08 au
q 2.555152619951185 1.5593e-07 au
i 4.989538049607279 4.6372e-06 deg
node 268.4324364459552 7.0917e-05 deg
peri 99.1172700905361 7.7696e-05 deg
M 289.6265502436923 3.3622e-05 deg
tp 2459723.961799400061
(2022-May-24.46179940)
0.0001578 TDB
period 1675.152322249995
4.59
1.6217e-05
4.44e-08
d
yr
n .2149058298868385 2.0805e-09 deg/d
Q 2.965629148903462 1.914e-08 au
  Orbit Determination Parameters
   # obs. used (total)      636  
   data-arc span      7906 days (21.65 yr)  
   first obs. used      1999-10-22  
   last obs. used      2021-06-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .62276  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:30:43  

Additional Information
 Earth MOID = 1.55904 au 
 Jupiter MOID = 2.40742 au 
 T_jup = 3.332 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457426.5 (2016-Feb-08.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07349492499290525 5.5756e-08  
q 2.556550767708836 1.5493e-07 au
tp 2458054.547050665667
(2017-Oct-28.04705067)
0.0001532 TDB
node 268.4489691276557 7.0895e-05 deg
peri 100.2138700775232 7.7837e-05 deg
i 4.990654498460028 4.6384e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      636  
   data-arc span      7906 days (21.65 yr)  
   first obs. used      1999-10-22  
   last obs. used      2021-06-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .62276  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:30:43  

Additional Information
 Jupiter MOID = 2.40742 au 
 T_jup = 3.332 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.108690037827584E-15 -8.587527216662492E-15 1.210446200540902E-13 2.104387518809426E-14 -3.471112140303316E-14 -1.350933647690627E-15
q -8.587527216662492E-15 2.400184423588552E-14 5.115648945112102E-13 -6.122271497197166E-14 2.541060580441682E-13 4.303588822691389E-15
tp 1.210446200540902E-13 5.115648945112102E-13 2.346899316740472E-8 5.61165674341488E-12 4.972508119119977E-9 1.951742929417567E-12
node 2.104387518809426E-14 -6.122271497197166E-14 5.61165674341488E-12 5.026076756150169E-9 -5.005993712290898E-9 -4.071252480484147E-11
peri -3.471112140303316E-14 2.541060580441682E-13 4.972508119119977E-9 -5.005993712290898E-9 6.058648084833083E-9 4.097721134190023E-11
i -1.350933647690627E-15 4.303588822691389E-15 1.951742929417567E-12 -4.071252480484147E-11 4.097721134190023E-11 2.151439393679772E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.18   n/a MPCxxxxx  

66831 (1999 UJ44)          Discovered 1999-Oct-29 by CSS at Catalina
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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