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201987 (2004 PA66)
Classification: Main-belt Asteroid          SPK-ID: 2201987
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2172792192394763 4.7917e-08  
a 2.321401664528962 1.4202e-08 au
q 1.817009323318889 1.1106e-07 au
i 2.221283684179863 5.3703e-06 deg
node 153.731488751358 0.00014824 deg
peri 160.4302665931608 0.00014881 deg
M 172.7516250173067 1.6182e-05 deg
tp 2458380.568784939017
(2018-Sep-19.06878494)
5.4434e-05 TDB
period 1291.885025102344
3.54
1.1856e-05
3.246e-08
d
yr
n .2786625690405233 2.5573e-09 deg/d
Q 2.825794005739036 1.7288e-08 au
  Orbit Determination Parameters
   # obs. used (total)      211  
   data-arc span      8182 days (22.40 yr)  
   first obs. used      1997-08-11  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57386  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 00:15:33  

Additional Information
 Earth MOID = .803346 au 
 Jupiter MOID = 2.46478 au 
 T_jup = 3.544 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456665.5 (2014-Jan-08.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2180540013802702 4.7844e-08  
q 1.814387663338421 1.1089e-07 au
tp 2457089.366383080385
(2015-Mar-07.86638308)
4.7882e-05 TDB
node 153.7647316595816 0.0001482 deg
peri 160.5127517601204 0.00014877 deg
i 2.221382029744583 5.3735e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      211  
   data-arc span      8182 days (22.40 yr)  
   first obs. used      1997-08-11  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57386  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 00:15:33  

Additional Information
 Jupiter MOID = 2.46478 au 
 T_jup = 3.544 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.289092752400868E-15 -5.279066482643487E-15 -1.788394424501159E-13 -5.410904755736665E-14 -3.567030848146372E-14 -9.529804084856828E-16
q -5.279066482643487E-15 1.229558297961744E-14 6.465769774919967E-13 1.278407546551061E-13 1.285800912728692E-13 2.205324034293585E-15
tp -1.788394424501159E-13 6.465769774919967E-13 2.292693742176398E-9 2.048547032455218E-11 6.486396187972008E-10 -1.014797611003465E-12
node -5.410904755736665E-14 1.278407546551061E-13 2.048547032455218E-11 2.196287819593037E-8 -2.193901705927098E-8 -1.702413045641927E-11
peri -3.567030848146372E-14 1.285800912728692E-13 6.486396187972008E-10 -2.193901705927098E-8 2.213103149563244E-8 1.671612658562495E-11
i -9.529804084856828E-16 2.205324034293585E-15 -1.014797611003465E-12 -1.702413045641927E-11 1.671612658562495E-11 2.887459179357648E-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 17.3   n/a MPO454432  

201987 (2004 PA66)          Discovered 2004-Aug-08 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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