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85429 (1997 AJ18)
Classification: Main-belt Asteroid          SPK-ID: 2085429
[ 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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05716637165449832 7.6639e-08  
a 2.965922390320092 2.9209e-08 au
q 2.796371368656656 2.2789e-07 au
i 9.815864818242833 5.0366e-06 deg
node 271.6315855124947 6.7181e-05 deg
peri 13.89919306032383 0.00014596 deg
M 43.07794528468807 0.00012783 deg
tp 2458777.250456091775
(2019-Oct-20.75045609)		 0.00066395 TDB
period 1865.684058880317
5.11		 2.7561e-05
7.546e-08		 d
yr
n .1929587157517187 2.8505e-09 deg/d
Q 3.135473411983529 3.0879e-08 au
   Orbit Determination Parameters
   # obs. used (total)      568  
   data-arc span      8705 days (23.83 yr)  
   first obs. used      1997-01-15  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50055  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:14:18  

Additional Information
 Earth MOID = 1.78094 au 
 Jupiter MOID = 1.98267 au 
 T_jup = 3.240 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457638.5 (2016-Sep-07.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05779984238742849 7.8263e-08  
q 2.794618111630781 2.349e-07 au
tp 2456923.418432041479
(2014-Sep-22.91843204)		 0.00066544 TDB
node 271.6705260758229 6.7263e-05 deg
peri 16.34526608595429 0.00014393 deg
i 9.809049359618802 5.0306e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      568  
   data-arc span      8705 days (23.83 yr)  
   first obs. used      1997-01-15  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50055  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:14:18  

Additional Information
 Jupiter MOID = 1.98267 au 
 T_jup = 3.240 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.12510867905173E-15 -1.825018746257141E-14 2.652648683361504E-11 -3.201165262306491E-14 4.783730087217937E-12 -2.110257952553831E-14
q -1.825018746257141E-14 5.517730884848536E-14 -8.886830529343348E-11 1.252337913479514E-13 -1.615125700207567E-11 7.015792360061229E-14
tp 2.652648683361504E-11 -8.886830529343348E-11 4.42809127412245E-7 -6.835597599188847E-10 8.49068730483005E-8 -2.967670156969364E-10
node -3.201165262306491E-14 1.252337913479514E-13 -6.835597599188847E-10 4.524368276695652E-9 -4.587920274352973E-9 4.26664963718233E-11
peri 4.783730087217937E-12 -1.615125700207567E-11 8.49068730483005E-8 -4.587920274352973E-9 2.071559352778423E-8 -9.816724722637019E-11
i -2.110257952553831E-14 7.015792360061229E-14 -2.967670156969364E-10 4.26664963718233E-11 -9.816724722637019E-11 2.530681413268681E-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 14.9   n/a MPO351440  
diameter diameter 3.467 km 0.564 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.212   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85429 (1997 AJ18)          Discovered 1997-Jan-15 by Klet at Klet
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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Alternate Designations
 1997 AJ18 = 2002 AU54 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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