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173939 (2001 WH12)
Classification: Main-belt Asteroid          SPK-ID: 2173939
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08271486433776705 4.7905e-08  
a 3.076736938535176 2.9559e-08 au
q 2.822245060061242 1.4199e-07 au
i 11.19350226474228 5.5839e-06 deg
node 76.83845539180898 3.3301e-05 deg
peri 28.61007958352315 5.2964e-05 deg
M 118.4005894991951 4.1311e-05 deg
tp 2458352.186090901670
(2018-Aug-21.68609090)
0.00022459 TDB
period 1971.214909170578
5.40
2.8407e-05
7.777e-08
d
yr
n .1826284888193526 2.6319e-09 deg/d
Q 3.33122881700911 3.2004e-08 au
  Orbit Determination Parameters
   # obs. used (total)      322  
   data-arc span      6735 days (18.44 yr)  
   first obs. used      2001-11-17  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59173  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:33:13  

Additional Information
 Earth MOID = 1.8445 au 
 Jupiter MOID = 1.87218 au 
 T_jup = 3.195 
[ 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 15.4   n/a MPO469865  

173939 (2001 WH12)          Discovered 2001-Nov-17 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

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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
1903-May-31 12:46 00:05 Jupiter 1.91428130618143 1.91428028164279 1.91428233073194 2.67435012638101 2.50343716988209 2416266.032210158 5.46133834345855 315.496586746311 21.839850209675 86.7141672380177 2061800.70374509 T 14 CATAB v2.0f-lin.ifort 2020-May-21 03:33:15 2020-May-21 03:33
1913-Feb-19 07:20 00:04 Jupiter 1.94335556008704 1.94335452239436 1.94335659778668 3.68323179173926 3.56293209537535 2419817.805835532 4.41183769041764 244.853747343333 28.6430338021858 -82.3986668421678 2611729.12832566 T 14 CATAB v2.0f-lin.ifort 2020-May-21 03:33:15 2020-May-21 03:33
1962-Dec-11 08:50 00:03 Jupiter 1.9226361515052 1.92263536863854 1.92263693437339 2.7654050690701 2.60122275654633 2438009.867893519 2.53980529938298 165.41604234085 22.219104144781 87.7194571422337 1917670.54008298 T 14 CATAB v2.0f-lin.ifort 2020-May-21 03:33:15 2020-May-21 03:33
1972-Aug-21 20:06 00:02 Jupiter 1.92548501745917 1.92548449498606 1.92548553993229 3.56336360635924 3.43769668097497 2441551.337549875 1.87352050136638 131.322667616166 21.8478305687802 88.4854710815187 2722476.49074677 T 14 CATAB v2.0f-lin.ifort 2020-May-21 03:33:15 2020-May-21 03:33
2022-Jun-23 01:46 < 00:01 Jupiter 1.9294488199454 1.92944815824353 1.92944948164717 2.92876362933033 2.77482650166376 2459753.573634690 0.492464643867514 90.4634970884287 23.9016786414461 87.9257427155176 2050987.24001247 T 14 CATAB v2.0f-lin.ifort 2020-May-21 03:33:15 2020-May-21 03:33
2032-Feb-23 18:40 < 00:01 Jupiter 1.91136238342796 1.91136177255232 1.91136299430359 3.42232492599146 3.29028957964812 2463286.277526777 0.815577526335502 86.3191648087466 24.5892027768531 84.4897869678604 2440524.19195775 T 14 CATAB v2.0f-lin.ifort 2020-May-21 03:33:15 2020-May-21 03:33
2082-Jan-02 08:30 00:03 Jupiter 1.93508007705197 1.93507936958182 1.93508078452399 3.14643007707928 3.0040943710448 2481496.853897974 3.2247293647188 245.544533382009 25.162009396577 -88.5557106042779 1922279.91089133 T 14 CATAB v2.0f-lin.ifort 2020-May-21 03:33:15 2020-May-21 03:33
2091-Aug-29 13:59 00:03 Jupiter 1.90070806816239 1.90070723211796 1.90070890420963 3.26041006333807 3.12073761800063 2485023.082852605 3.47456536930649 208.039003383347 27.4113358140336 -87.5957190226462 2307879.3030156 T 14 CATAB v2.0f-lin.ifort 2020-May-21 03:33:15 2020-May-21 03:33
2141-Jul-15 02:09 00:06 Jupiter 1.94037994595258 1.94037901182796 1.94038088009242 3.39723410430082 3.2662136268256 2503239.589595039 5.93335585977755 396.770300736116 25.9726429746698 -89.9259569585224 1840576.57318062 T 14 CATAB v2.0f-lin.ifort 2020-May-21 03:33:15 2020-May-21 03:33
2151-Mar-07 18:48 00:06 Jupiter 1.89304707078337 1.89304612279148 1.89304801878774 3.07966194480138 2.9307746926534 2506762.283658853 6.27994954419306 352.076636667239 25.8938412609513 89.9023534286319 2271815.29440081 T 14 CATAB v2.0f-lin.ifort 2020-May-21 03:33:15 2020-May-21 03:33
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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