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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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01389472481234329 3.3617e-08  
a 2.833206964222124 1.4268e-08 au
q 2.793840333117843 9.388e-08 au
i 3.11101792703014 3.6265e-06 deg
node 68.67719928983804 6.8478e-05 deg
peri 228.8863009033696 0.00015454 deg
M 82.44458969558107 0.00013803 deg
tp 2458601.589435483831
(2019-Apr-28.08943548)
0.00066833 TDB
period 1741.870555194454
4.77
1.3158e-05
3.602e-08
d
yr
n .2066743702202437 1.5612e-09 deg/d
Q 2.872573595326405 1.4466e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1358  
   data-arc span      7841 days (21.47 yr)  
   first obs. used      1999-05-08  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51695  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:00:15  

Additional Information
 Earth MOID = 1.77892 au 
 Jupiter MOID = 2.12962 au 
 T_jup = 3.310 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456997.5 (2014-Dec-06.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01614104945762132 3.3485e-08  
q 2.788846977218527 9.417e-08 au
tp 2456883.705275137094
(2014-Aug-14.20527514)
0.00057911 TDB
node 68.70288447416621 6.8514e-05 deg
peri 234.1287500090237 0.00013784 deg
i 3.111212436453421 3.6238e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1358  
   data-arc span      7841 days (21.47 yr)  
   first obs. used      1999-05-08  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51695  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:00:15  

Additional Information
 Jupiter MOID = 2.12962 au 
 T_jup = 3.310 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.1212774819304E-15 -3.118316577921455E-15 5.899649040349781E-13 3.637649733680044E-15 9.45210310711506E-14 -1.89554297956765E-16
q -3.118316577921455E-15 8.867937170679776E-15 -3.336797091221966E-12 -1.024327556416884E-14 -6.130212329369896E-13 6.53451319108158E-16
tp 5.899649040349781E-13 -3.336797091221966E-12 3.353642780878123E-7 2.238923891036028E-11 6.928432469692462E-8 -4.11483381756393E-12
node 3.637649733680044E-15 -1.024327556416884E-14 2.238923891036028E-11 4.694174671192617E-9 -4.682398563327993E-9 -8.273277555737208E-12
peri 9.45210310711506E-14 -6.130212329369896E-13 6.928432469692462E-8 -4.682398563327993E-9 1.900114013463031E-8 7.419385006194364E-12
i -1.89554297956765E-16 6.53451319108158E-16 -4.11483381756393E-12 -8.273277555737208E-12 7.419385006194364E-12 1.31321066014277E-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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