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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01379823158807136 3.2723e-08  
a 2.833840652542383 1.3256e-08 au
q 2.794738662934912 8.9967e-08 au
i 3.110803459045252 3.6145e-06 deg
node 68.67900994477439 6.1341e-05 deg
peri 229.7387995103991 0.00014692 deg
M 122.9236618969862 0.00013346 deg
tp 2458605.530703160932
(2019-May-02.03070316)
0.00064625 TDB
period 1742.454980242627
4.77
1.2227e-05
3.348e-08
d
yr
n .2066050509665806 1.4497e-09 deg/d
Q 2.872942642149854 1.3439e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1465  
   data-arc span      7949 days (21.76 yr)  
   first obs. used      1999-05-08  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51067  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 11:15:39  

Additional Information
 Earth MOID = 1.77793 au 
 Jupiter MOID = 2.12841 au 
 T_jup = 3.310 
[ show covariance matrix ]

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 14.44   n/a MPCxxxxx  
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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2174-Jan-27 08:16 00:02 Inter 0.0412517184906971 0.0412216376295976 0.0412818028734842 6.51258584826302 6.51258579377221 2515123.844276596 1.50596298508358 1615.52522796531 32.1546835081936 -21.8423451464688 71464.8366852468 T 28 CATAB v2.0f-lin.ifort 2021-Apr-13 11:15:43 2021-Apr-13 11:15
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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