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78250 (2002 PE9)
Classification: Outer Main-belt Asteroid          SPK-ID: 2078250
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1699422507165848 4.9293e-08  
a 3.200883237758396 2.0494e-08 au
q 2.656917936052745 1.5632e-07 au
i 4.680222248131188 5.5571e-06 deg
node 205.1446041754622 4.5791e-05 deg
peri 189.2841412010905 4.8582e-05 deg
M 10.03681134267059 1.2832e-05 deg
tp 2459142.182830688490
(2020-Oct-19.68283069)
7.4754e-05 TDB
period 2091.718199672532
5.73
2.0089e-05
5.5e-08
d
yr
n .1721073135264395 1.6529e-09 deg/d
Q 3.744848539464046 2.3977e-08 au
  Orbit Determination Parameters
   # obs. used (total)      709  
   data-arc span      10717 days (29.34 yr)  
   first obs. used      1991-09-15  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45566  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 07:14:21  

Additional Information
 Earth MOID = 1.66245 au 
 Jupiter MOID = 1.68926 au 
 T_jup = 3.166 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457742.5 (2016-Dec-20.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1708298046210205 4.9842e-08  
q 2.657846582110081 1.5674e-07 au
tp 2457025.951871393159
(2015-Jan-03.45187139)
8.0644e-05 TDB
node 205.3235877751772 4.5605e-05 deg
peri 186.3287813032281 4.8347e-05 deg
i 4.678376443033641 5.577e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      709  
   data-arc span      10717 days (29.34 yr)  
   first obs. used      1991-09-15  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45566  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 07:14:21  

Additional Information
 Jupiter MOID = 1.68926 au 
 T_jup = 3.166 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.484223824463809E-15 -7.775648463726133E-15 -4.735150598958087E-13 -2.700939102884493E-15 -4.829244537582368E-14 -1.144621624413206E-15
q -7.775648463726133E-15 2.456885372268279E-14 1.081061499718473E-12 6.21010766870508E-15 9.346283244909253E-14 4.021941997975134E-15
tp -4.735150598958087E-13 1.081061499718473E-12 6.503411500737698E-9 1.985584683940019E-11 1.293724759474889E-9 -7.938518794903231E-14
node -2.700939102884493E-15 6.21010766870508E-15 1.985584683940019E-11 2.07979048239871E-9 -2.069769450567288E-9 9.199335170882899E-12
peri -4.829244537582368E-14 9.346283244909253E-14 1.293724759474889E-9 -2.069769450567288E-9 2.337417140883173E-9 -9.216801009707371E-12
i -1.144621624413206E-15 4.021941997975134E-15 -7.938518794903231E-14 9.199335170882899E-12 -9.216801009707371E-12 3.110304661381713E-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 15.13   n/a E2021B10  
diameter diameter 5.933 km 0.357 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.042   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

78250 (2002 PE9)          Discovered 2002-Aug-05 by NEAT at Palomar
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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