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390187 (2012 WH18)
Classification: Main-belt Asteroid          SPK-ID: 2390187
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 .1636737538057273 6.2821e-08  
a 3.116367613343682 4.6459e-08 au
q 2.606300027829126 1.8774e-07 au
i 8.626104547136634 9.0157e-06 deg
node 45.16442333712037 4.3974e-05 deg
peri 102.6892196182126 5.1811e-05 deg
M 63.90354970581289 2.6771e-05 deg
tp 2458643.807537114721
(2019-Jun-09.30753711)
0.00014634 TDB
period 2009.423376789658
5.50
4.4935e-05
1.23e-07
d
yr
n .1791558733506682 4.0063e-09 deg/d
Q 3.626435198858237 5.4063e-08 au
  Orbit Determination Parameters
   # obs. used (total)      143  
   data-arc span      4911 days (13.45 yr)  
   first obs. used      2006-11-16  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66343  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-22 01:15:27  

Additional Information
 Earth MOID = 1.63454 au 
 Jupiter MOID = 1.46066 au 
 T_jup = 3.179 
[ 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 16.3   n/a MPO427945  

390187 (2012 WH18)          Discovered 2007-Nov-17 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2014-03-21

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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
1941-Feb-12 19:31 00:05 Jupiter 1.92780138081991 1.92779722194544 1.92780553970994 3.75765404798179 3.63884863047973 2430038.313221091 5.17276189163022 358.330344053469 45.3735174288612 -60.4729093718703 1064659.75263089 T 12 CATAB v2.0f-lin.ifort 2020-May-22 01:15:28 2020-May-22 01:15
1951-Mar-10 05:43 00:05 Jupiter 1.45657529487801 1.45657428113423 1.45657630862411 1.69069142538356 1.30207702029945 2433715.738000495 4.72050223969594 588.305419659616 385.62577487807 -71.5324499138006 411459.965402781 T 12 CATAB v2.0f-lin.ifort 2020-May-22 01:15:28 2020-May-22 01:15
1961-Feb-06 17:03 00:04 Jupiter 1.82487551972637 1.82487303122937 1.82487800821642 2.03616076581025 1.79377910930117 2437337.210380376 4.05721821285403 157.040005976345 34.3866251355341 61.2931805648269 505230.469350501 T 12 CATAB v2.0f-lin.ifort 2020-May-22 01:15:28 2020-May-22 01:15
2023-Jan-02 16:56 < 00:01 Jupiter 1.52326571016544 1.52326479341652 1.52326662692648 2.33326552070272 2.08134909360035 2459947.205626611 0.626442062909877 431.413634705045 26.6380534467069 -83.140468213881 958292.120843768 T 12 CATAB v2.0f-lin.ifort 2020-May-22 01:15:28 2020-May-22 01:15
2032-Dec-24 19:30 00:02 Jupiter 1.64333567408455 1.64333434766751 1.64333700052606 1.19266597982212 0.625775169019278 2463591.312168758 1.5102763705512 1563.01545329986 504.859081873898 33.0243251993866 1209817.96589669 T 12 CATAB v2.0f-lin.ifort 2020-May-22 01:15:28 2020-May-22 01:15
2094-Oct-31 21:01 00:05 Jupiter 1.69729943012164 1.69729587816568 1.69730298213404 2.95388092794121 2.77980753550269 2486182.375807318 5.47604958793194 566.408501469937 28.611697312717 -76.4458171766323 849037.294113328 T 12 CATAB v2.0f-lin.ifort 2020-May-22 01:15:28 2020-May-22 01:15
2104-Nov-18 06:42 00:07 Jupiter 1.49699913432651 1.49699655243779 1.49700171660378 1.36471456691287 0.854879282196146 2489851.779239727 6.69698826609996 2063.66392445117 664.253068005707 -51.5914515980485 637284.328298863 T 12 CATAB v2.0f-lin.ifort 2020-May-22 01:15:28 2020-May-22 01:15
2166-Aug-20 23:13 00:10 Jupiter 1.91866228857078 1.91865466612049 1.91866991108159 3.57568000582566 3.45000829333642 2512407.467476939 10.0814286502423 672.074102684306 39.1472140403596 -60.5759239273934 1159645.50456029 T 12 CATAB v2.0f-lin.ifort 2020-May-22 01:15:28 2020-May-22 01:15
2176-Sep-17 22:26 00:11 Jupiter 1.43392464734179 1.43392383081735 1.43392546388033 1.92439849017934 1.58805070718622 2516088.434425882 11.1092021129687 688.102382173654 278.530032119083 -67.8183102946387 388276.265465366 T 12 CATAB v2.0f-lin.ifort 2020-May-22 01:15:28 2020-May-22 01:15
2186-Aug-22 11:06 00:13 Jupiter 1.85588541385685 1.85587734382929 1.85589348383999 2.02937443289945 1.7904090187796 2519713.962821542 12.9135943802349 486.626954929159 16.8347859515527 66.7279001135552 541885.320279628 T 12 CATAB v2.0f-lin.ifort 2020-May-22 01:15:28 2020-May-22 01:15

Alternate Designations
 2012 WH18 = 2009 HW24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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