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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457315.5 (2015-Oct-20.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03906788738635413 5.5683e-08  
q 2.669739952523297 1.6274e-07 au
tp 2456962.573492401243
(2014-Nov-01.07349240)
0.00039368 TDB
node 209.1209132021305 6.1261e-05 deg
peri 91.90761439444562 0.00010451 deg
i 4.844154396376664 6.0612e-06 deg
  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
 Jupiter MOID = 2.18583 au 
 T_jup = 3.328 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.100574059089151E-15 -8.953701732169945E-15 3.150284288682348E-12 -6.922902737945495E-15 5.321097093765505E-13 -4.196356242539937E-15
q -8.953701732169945E-15 2.648338916548738E-14 -1.165327035850901E-11 1.771686933041975E-14 -2.06462489531168E-12 1.284602250009392E-14
tp 3.150284288682348E-12 -1.165327035850901E-11 1.549825068305037E-7 6.059753047833603E-11 3.334562988674226E-8 -2.217464149207958E-11
node -6.922902737945495E-15 1.771686933041975E-14 6.059753047833603E-11 3.752916494508354E-9 -3.725580204471313E-9 -6.477219510002517E-11
peri 5.321097093765505E-13 -2.06462489531168E-12 3.334562988674226E-8 -3.725580204471313E-9 1.092325267557911E-8 5.998771857852454E-11
i -4.196356242539937E-15 1.284602250009392E-14 -2.217464149207958E-11 -6.477219510002517E-11 5.998771857852454E-11 3.673815919874588E-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 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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