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181840 (1998 TS12)
Classification: Main-belt Asteroid          SPK-ID: 2181840
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1604881195257904 3.9736e-08  
a 2.374159989415806 9.8612e-09 au
q 1.993135517261093 9.2387e-08 au
i 4.22978978871363 5.4853e-06 deg
node 33.22323445185947 4.6733e-05 deg
peri 307.3057718453198 4.9633e-05 deg
M 62.04888210902934 1.5955e-05 deg
tp 2458970.199510918943
(2020-Apr-30.69951092)
5.8762e-05 TDB
period 1336.175177555951
3.66
8.3248e-06
2.279e-08
d
yr
n .2694257504906578 1.6786e-09 deg/d
Q 2.755184461570519 1.1444e-08 au
  Orbit Determination Parameters
   # obs. used (total)      402  
   data-arc span      10176 days (27.86 yr)  
   first obs. used      1993-03-23  
   last obs. used      2021-01-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49399  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:16  

Additional Information
 Earth MOID = .986475 au 
 Jupiter MOID = 2.6359 au 
 T_jup = 3.521 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458074.5 (2017-Nov-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .161316348157249 3.9761e-08  
q 1.990867841220969 9.2551e-08 au
tp 2457634.869730509907
(2016-Sep-03.36973051)
5.6547e-05 TDB
node 33.25876537139639 4.6685e-05 deg
peri 307.4762406628992 4.9563e-05 deg
i 4.232655661613095 5.4885e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      402  
   data-arc span      10176 days (27.86 yr)  
   first obs. used      1993-03-23  
   last obs. used      2021-01-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49399  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:16  

Additional Information
 Jupiter MOID = 2.6359 au 
 T_jup = 3.521 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.580932296179854E-15 -3.666334448263665E-15 9.329608430541644E-13 -1.289099136915266E-14 2.519586662363228E-13 -4.652947379697577E-15
q -3.666334448263665E-15 8.565775794644936E-15 -2.14250737407315E-12 2.945858636598435E-14 -5.730071329911033E-13 1.106297463030766E-14
tp 9.329608430541644E-13 -2.14250737407315E-12 3.197514714067529E-9 -1.071620404575091E-11 9.476227034159037E-10 -4.55147436782975E-12
node -1.289099136915266E-14 2.945858636598435E-14 -1.071620404575091E-11 2.179478328402459E-9 -2.175529353022543E-9 -1.092856571291916E-12
peri 2.519586662363228E-13 -5.730071329911033E-13 9.476227034159037E-10 -2.175529353022543E-9 2.456508373413484E-9 -6.563203867212813E-14
i -4.652947379697577E-15 1.106297463030766E-14 -4.55147436782975E-12 -1.092856571291916E-12 -6.563203867212813E-14 3.012334946717755E-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 16.84   n/a MPCxxxxx  

181840 (1998 TS12)          Discovered 1998-Oct-13 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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