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JPL Small-Body Database Browser
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56234 (1999 JL42)
Classification: Main-belt Asteroid          SPK-ID: 2056234
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01389472480512398 3.482e-08  
a 2.833206964014526 1.5385e-08 au
q 2.793840332933583 9.8982e-08 au
i 3.111017791856168 3.6666e-06 deg
node 68.6771944103494 7.3352e-05 deg
peri 228.886307939823 0.00016196 deg
M 82.44458761522121 0.00014344 deg
tp 2458601.589445593558
(2019-Apr-28.08944559)
0.00069486 TDB
period 1741.870555003005
4.77
1.4188e-05
3.884e-08
d
yr
n .2066743702429592 1.6834e-09 deg/d
Q 2.872573595095469 1.5599e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1257  
   data-arc span      7477 days (20.47 yr)  
   first obs. used      1999-05-08  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53086  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 11:44:53  

Additional Information
 Earth MOID = 1.77892 au 
 Jupiter MOID = 2.12962 au 
 T_jup = 3.310 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456788.5 (2014-May-11.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0161569488660924 3.4955e-08  
q 2.788862154675194 1.0024e-07 au
tp 2456885.409905995244
(2014-Aug-15.90990600)
0.00059812 TDB
node 68.7069361766237 7.3383e-05 deg
peri 234.4884837699498 0.00014375 deg
i 3.111364470179852 3.6637e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1257  
   data-arc span      7477 days (20.47 yr)  
   first obs. used      1999-05-08  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53086  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 11:44:53  

Additional Information
 Jupiter MOID = 2.12962 au 
 T_jup = 3.310 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.221882486134767E-15 -3.462993424735607E-15 2.099202334249833E-12 2.42156806370092E-15 4.139391824341665E-13 -2.873426022783964E-16
q -3.462993424735607E-15 1.004806769534593E-14 -8.525125557018165E-12 -6.706233665625416E-15 -1.710256365682175E-12 9.763429531252065E-16
tp 2.099202334249833E-12 -8.525125557018165E-12 3.5775134621715E-7 7.727036551543964E-11 7.395212230046004E-8 -4.089653643920879E-12
node 2.42156806370092E-15 -6.706233665625416E-15 7.727036551543964E-11 5.385055066164858E-9 -5.360894911155802E-9 5.37690526429024E-12
peri 4.139391824341665E-13 -1.710256365682175E-12 7.395212230046004E-8 -5.360894911155802E-9 2.066351149111827E-8 -6.20977177379195E-12
i -2.873426022783964E-16 9.763429531252065E-16 -4.089653643920879E-12 5.37690526429024E-12 -6.20977177379195E-12 1.342236227651037E-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 14.4   n/a MPO436176  
diameter diameter 3.547 km 0.937 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.293   0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

56234 (1999 JL42)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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