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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07435115528581049 5.5405e-08  
a 2.760390883413614 1.7752e-08 au
q 2.555152632191393 1.5488e-07 au
i 4.989538057419294 4.6321e-06 deg
node 268.4324360726076 7.0504e-05 deg
peri 99.11726951525618 7.7313e-05 deg
M 289.626551689484 3.3554e-05 deg
tp 2459723.961792492120
(2022-May-24.46179249)
0.00015747 TDB
period 1675.152321327236
4.59
1.6159e-05
4.424e-08
d
yr
n .2149058300052197 2.0731e-09 deg/d
Q 2.965629134635835 1.9072e-08 au
  Orbit Determination Parameters
   # obs. used (total)      644  
   data-arc span      7941 days (21.74 yr)  
   first obs. used      1999-10-22  
   last obs. used      2021-07-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61985  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 17:43:14  

Additional Information
 Earth MOID = 1.55904 au 
 Jupiter MOID = 2.40742 au 
 T_jup = 3.332 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457434.5 (2016-Feb-16.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07350124826295366 5.5309e-08  
q 2.556524913285968 1.5389e-07 au
tp 2458054.536270324984
(2017-Oct-28.03627033)
0.00015296 TDB
node 268.4488432132297 7.0482e-05 deg
peri 100.2129651510789 7.7456e-05 deg
i 4.990667692514801 4.6333e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      644  
   data-arc span      7941 days (21.74 yr)  
   first obs. used      1999-10-22  
   last obs. used      2021-07-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61985  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 17:43:14  

Additional Information
 Jupiter MOID = 2.40742 au 
 T_jup = 3.332 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.059064657395675E-15 -8.461508764300293E-15 6.332975540920388E-14 2.056350328271953E-14 -4.319165765718146E-14 -1.342208988720759E-15
q -8.461508764300293E-15 2.368196773971E-14 6.589825795287005E-13 -5.991582103881102E-14 2.757372870549455E-13 4.282719607407534E-15
tp 6.332975540920388E-14 6.589825795287005E-13 2.339719884007384E-8 4.161837769376332E-12 4.962464390131635E-9 1.985509890940599E-12
node 2.056350328271953E-14 -5.991582103881102E-14 4.161837769376332E-12 4.96771244345689E-9 -4.948140106896191E-9 -3.906205126055178E-11
peri -4.319165765718146E-14 2.757372870549455E-13 4.962464390131635E-9 -4.948140106896191E-9 5.999440785518776E-9 3.93396114275941E-11
i -1.342208988720759E-15 4.282719607407534E-15 1.985509890940599E-12 -3.906205126055178E-11 3.93396114275941E-11 2.14676352137068E-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 15.19   n/a MPO636973  

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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