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243457 (2009 JA18)
Classification: Main-belt Asteroid          SPK-ID: 2243457
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03733570739536597 5.581e-08  
a 2.777391484465806 2.6535e-08 au
q 2.673695608679409 1.6233e-07 au
i 4.842912874990028 6.0556e-06 deg
node 209.0843514303737 6.1328e-05 deg
peri 89.81448363105652 0.00010772 deg
M 75.83083042713399 8.6173e-05 deg
tp 2458644.379161297073
(2019-Jun-09.87916130)
0.00040581 TDB
period 1690.651430439557
4.63
2.4228e-05
6.633e-08
d
yr
n .2129356729118329 3.0515e-09 deg/d
Q 2.881087360252202 2.7525e-08 au
  Orbit Determination Parameters
   # obs. used (total)      231  
   data-arc span      6583 days (18.02 yr)  
   first obs. used      2001-09-20  
   last obs. used      2019-09-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57121  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 02:15:22  

Additional Information
 Earth MOID = 1.66371 au 
 Jupiter MOID = 2.18583 au 
 T_jup = 3.328 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO413138  
diameter diameter 3.001 km 0.457 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.059   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

243457 (2009 JA18)          Discovered 2009-May-03 by Spacewatch at Kitt Peak
Reference: 20100626/Numbers.arcLast Updated: 2010-06-28

Alternate Designations
 2009 JA18 = 2006 UD340 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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