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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


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 
[ 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 14.4   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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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 23 CATAB v2.0f-lin.ifort 2020-Feb-23 11:45:08 2020-Feb-23 11:45
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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