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376481 (2012 JS54)
Classification: Main-belt Asteroid          SPK-ID: 2376481
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1137203315435899 6.0306e-08  
a 2.281861563076634 2.8132e-08 au
q 2.022367509586986 1.4769e-07 au
i 6.055618275539239 6.0313e-06 deg
node 129.254742525414 5.7939e-05 deg
peri 249.6856434353106 6.485e-05 deg
M 337.5113743581041 3.4646e-05 deg
tp 2459079.148923111607
0.0001219 TDB
period 1259.019238037868
n .2859368539602667 5.2878e-09 deg/d
Q 2.541355616566284 3.1331e-08 au
  Orbit Determination Parameters
   # obs. used (total)      122  
   data-arc span      4679 days (12.81 yr)  
   first obs. used      2006-10-02  
   last obs. used      2019-07-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62513  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:55:40  

Additional Information
 Earth MOID = 1.03308 au 
 Jupiter MOID = 2.91225 au 
 T_jup = 3.589 
[ 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 17.7   n/a MPO437548  

376481 (2012 JS54)          Discovered 2008-Mar-06 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2013-10-21

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
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
2161-Jul-20 23:30 00:20 Hebe 0.0407189167847396 0.0406352429613795 0.0408028183810943 3.5284772265596 3.52847718329089 2510550.479039371 20.0050626971563 6360.19263398434 54.3725598360871 -48.9810405813965 84459.7807478362 T 12 CATAB v2.0f-lin.ifort 2019-Sep-24 06:55:42 2019-Sep-24 06:55
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2020-Jul-02 07:05 UT
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