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287641 (2003 JA4)
Classification: Main-belt Asteroid          SPK-ID: 2287641
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 .2608301999585891 5.6295e-08  
a 2.62204694349364 1.9207e-08 au
q 1.938137914921386 1.5706e-07 au
i 6.806769840022273 4.2764e-06 deg
node 117.4477735277957 4.7639e-05 deg
peri 176.2127977425538 4.8931e-05 deg
M 307.2221500620631 1.2825e-05 deg
tp 2459227.856991706450
(2021-Jan-13.35699171)
5.6864e-05 TDB
period 1550.811886247171
4.25
1.704e-05
4.665e-08
d
yr
n .2321364719941426 2.5507e-09 deg/d
Q 3.305955972065893 2.4217e-08 au
  Orbit Determination Parameters
   # obs. used (total)      340  
   data-arc span      7684 days (21.04 yr)  
   first obs. used      1999-05-12  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56901  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 20:18:12  

Additional Information
 Earth MOID = .922117 au 
 Jupiter MOID = 1.91218 au 
 T_jup = 3.345 
[ show covariance matrix ]

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 16.64   n/a E2021B55  
diameter diameter 3.495 km 1.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
geometric albedo albedo 0.033   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

287641 (2003 JA4)          Discovered 2003-May-03 by Klet at Klet
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

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Alternate Designations
 2003 JA4 = 1999 JJ129 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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