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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 ]

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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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01389472473658776 3.4672e-08  
a 2.833206964230998 1.528e-08 au
q 2.793840333341225 9.8385e-08 au
i 3.111017777676963 3.6591e-06 deg
node 68.67719399170315 7.2988e-05 deg
peri 228.8863063407122 0.00016143 deg
M 82.44458954454007 0.00014307 deg
tp 2458601.589436212773
(2019-Apr-28.08943621)
0.00069301 TDB
period 1741.870555202637
4.77
1.4092e-05
3.858e-08
d
yr
n .2066743702192727 1.672e-09 deg/d
Q 2.872573595120771 1.5493e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1260  
   data-arc span      7755 days (21.23 yr)  
   first obs. used      1999-05-08  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53032  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 05:10:27  

Additional Information
 Earth MOID = 1.77892 au 
 Jupiter MOID = 2.12962 au 
 T_jup = 3.310 
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Orbital Elements at Epoch 2456819.5 (2014-Jun-11.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01615936422659183 3.4783e-08  
q 2.788871924302036 9.9555e-08 au
tp 2456885.205879986333
(2014-Aug-15.70587999)
0.00059678 TDB
node 68.70644326061777 7.302e-05 deg
peri 234.4454450941943 0.00014332 deg
i 3.111329242160632 3.6562e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1260  
   data-arc span      7755 days (21.23 yr)  
   first obs. used      1999-05-08  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53032  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 05:10:27  

Additional Information
 Jupiter MOID = 2.12962 au 
 T_jup = 3.310 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.209839213830501E-15 -3.422385323660601E-15 1.963633591391919E-12 2.493464906414661E-15 3.851504858237157E-13 -2.763528110178056E-16
q -3.422385323660601E-15 9.911276665072312E-15 -8.066680584835783E-12 -6.94466957324913E-15 -1.612928750834806E-12 9.392449628834593E-16
tp 1.963633591391919E-12 -8.066680584835783E-12 3.561412656995458E-7 7.342189469923184E-11 7.361440411106274E-8 -4.116358048577151E-12
node 2.493464906414661E-15 -6.94466957324913E-15 7.342189469923184E-11 5.331968062156111E-9 -5.308681812655874E-9 3.674219316813529E-12
peri 3.851504858237157E-13 -1.612928750834806E-12 7.361440411106274E-8 -5.308681812655874E-9 2.053971949968779E-8 -4.514583962954194E-12
i -2.763528110178056E-16 9.392449628834593E-16 -4.116358048577151E-12 3.674219316813529E-12 -4.514583962954194E-12 1.336763444256305E-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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