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181850 (1998 UA47)
Classification: Main-belt Asteroid          SPK-ID: 2181850
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1013680956951412 4.2134e-08  
a 2.421782129476858 1.3582e-08 au
q 2.176290686823265 9.7663e-08 au
i 5.594568241877378 3.7015e-06 deg
node 233.633862156366 4.9879e-05 deg
peri 30.54953283066601 5.5332e-05 deg
M 78.58439068731496 2.3305e-05 deg
tp 2458900.006680343473
(2020-Feb-20.50668034)
8.9372e-05 TDB
period 1376.578658054183
3.77
1.1581e-05
3.171e-08
d
yr
n .2615179291743968 2.2e-09 deg/d
Q 2.667273572130451 1.4959e-08 au
  Orbit Determination Parameters
   # obs. used (total)      480  
   data-arc span      8031 days (21.99 yr)  
   first obs. used      1998-10-24  
   last obs. used      2020-10-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53924  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:18  

Additional Information
 Earth MOID = 1.1612 au 
 Jupiter MOID = 2.38282 au 
 T_jup = 3.500 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457816.5 (2017-Mar-04.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1006156697998959 4.219e-08  
q 2.178626162389229 9.7735e-08 au
tp 2457523.880094961090
(2016-May-15.38009496)
9.2054e-05 TDB
node 233.6748655056894 4.9842e-05 deg
peri 30.80674605831523 5.5351e-05 deg
i 5.595939850622843 3.7027e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      480  
   data-arc span      8031 days (21.99 yr)  
   first obs. used      1998-10-24  
   last obs. used      2020-10-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53924  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:18  

Additional Information
 Jupiter MOID = 2.38282 au 
 T_jup = 3.500 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.779968484672121E-15 -4.09657480521981E-15 5.188987962000467E-13 1.144182116684633E-14 8.168779638993886E-14 -1.891350528352436E-15
q -4.09657480521981E-15 9.552168430691328E-15 -1.535845558471403E-12 -2.472162167931789E-14 -2.735730153351957E-13 4.742704968779044E-15
tp 5.188987962000467E-13 -1.535845558471403E-12 8.473873062832743E-9 1.379282129371998E-11 2.240136432538263E-9 -7.327605598756435E-12
node 1.144182116684633E-14 -2.472162167931789E-14 1.379282129371998E-11 2.484198556771558E-9 -2.468854632060066E-9 2.278299897229653E-12
peri 8.168779638993886E-14 -2.735730153351957E-13 2.240136432538263E-9 -2.468854632060066E-9 3.063747422617349E-9 -4.164526221260672E-12
i -1.891350528352436E-15 4.742704968779044E-15 -7.327605598756435E-12 2.278299897229653E-12 -4.164526221260672E-12 1.370972765476101E-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 16.55   n/a E2021B55  

181850 (1998 UA47)          Discovered 1998-Oct-24 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

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