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201990 (2004 PC78)
Classification: Main-belt Asteroid          SPK-ID: 2201990
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07831577935855032 5.5099e-08  
a 2.536786419301202 1.6521e-08 au
q 2.338116013807443 1.4117e-07 au
i 3.454622796100703 3.9281e-06 deg
node 225.0159992241517 0.0001056 deg
peri 60.18896603748703 0.00011249 deg
M 3.847837799029829 3.7928e-05 deg
tp 2458984.726119777247
(2020-May-15.22611978)
0.00015552 TDB
period 1475.789047454911
4.04
1.4417e-05
3.947e-08
d
yr
n .243937302977578 2.383e-09 deg/d
Q 2.735456824794962 1.7815e-08 au
  Orbit Determination Parameters
   # obs. used (total)      291  
   data-arc span      7253 days (19.86 yr)  
   first obs. used      2000-09-19  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56367  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 14:35:00  

Additional Information
 Earth MOID = 1.32409 au 
 Jupiter MOID = 2.35835 au 
 T_jup = 3.441 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457675.5 (2016-Oct-14.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07729733962027663 5.5318e-08  
q 2.339894395177893 1.4144e-07 au
tp 2457511.421635000182
(2016-May-02.92163500)
0.00016071 TDB
node 225.0405525218547 0.00010553 deg
peri 60.58287212113166 0.00011253 deg
i 3.455713914560887 3.93e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      291  
   data-arc span      7253 days (19.86 yr)  
   first obs. used      2000-09-19  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56367  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 14:35:00  

Additional Information
 Jupiter MOID = 2.35835 au 
 T_jup = 3.441 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.060110646862461E-15 -7.779032302436474E-15 5.09633818729601E-12 8.475976692245176E-14 1.238912300043037E-12 -4.732584724040927E-15
q -7.779032302436474E-15 2.000656123434365E-14 -1.366870499871486E-11 -2.193434997650107E-13 -3.320063552277768E-12 1.228975227891522E-14
tp 5.09633818729601E-12 -1.366870499871486E-11 2.582627902940492E-8 2.809909537674801E-10 6.346353886330074E-9 -1.10141031614201E-11
node 8.475976692245176E-14 -2.193434997650107E-13 2.809909537674801E-10 1.11358952475949E-8 -1.10437348235941E-8 -4.761501248438024E-11
peri 1.238912300043037E-12 -3.320063552277768E-12 6.346353886330074E-9 -1.10437348235941E-8 1.266406316009116E-8 4.472441873929239E-11
i -4.732584724040927E-15 1.228975227891522E-14 -1.10141031614201E-11 -4.761501248438024E-11 4.472441873929239E-11 1.544470863759931E-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 16.4   n/a MPO433323  

201990 (2004 PC78)          Discovered 2004-Aug-09 by LINEAR at Socorro
Reference: 20081212/Numbers.arcLast Updated: 2008-12-12
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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