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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1636736825625343 9.2917e-08  
a 3.11636764863062 5.7989e-08 au
q 2.6063002793605 3.0658e-07 au
i 8.626106849702225 9.1187e-06 deg
node 45.16436234422472 5.8133e-05 deg
peri 102.6892730540524 6.4128e-05 deg
M 63.9035476137478 2.6895e-05 deg
tp 2458643.807542733771
(2019-Jun-09.30754273)
0.00014659 TDB
period 2009.423410919007
5.50
5.6086e-05
1.536e-07
d
yr
n .1791558703077687 5.0005e-09 deg/d
Q 3.626435017900739 6.748e-08 au
  Orbit Determination Parameters
   # obs. used (total)      120  
   data-arc span      4827 days (13.22 yr)  
   first obs. used      2006-11-16  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .67757  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 04:31:02  

Additional Information
 Earth MOID = 1.63454 au 
 Jupiter MOID = 1.46066 au 
 T_jup = 3.179 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457565.5 (2016-Jun-26.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1647016502146513 9.2722e-08  
q 2.603826698924775 3.066e-07 au
tp 2456632.437500663811
(2013-Dec-05.93750066)
0.00013809 TDB
node 45.17808386545028 5.8136e-05 deg
peri 102.5487612761264 6.4064e-05 deg
i 8.626234367330097 9.1189e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      120  
   data-arc span      4827 days (13.22 yr)  
   first obs. used      2006-11-16  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .67757  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 04:31:02  

Additional Information
 Jupiter MOID = 1.46066 au 
 T_jup = 3.179 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.597457114836287E-15 -2.809479720689184E-14 4.418343079683443E-12 1.974526295248492E-14 9.691099306029542E-13 -1.289851320176248E-14
q -2.809479720689184E-14 9.400176324028836E-14 -1.42075072962895E-11 -7.307601811087588E-14 -2.927744916919192E-12 4.616429945452799E-14
tp 4.418343079683443E-12 -1.42075072962895E-11 1.906830310055129E-8 -2.064095339965862E-11 3.771058593074242E-9 -1.394651843316644E-13
node 1.974526295248492E-14 -7.307601811087588E-14 -2.064095339965862E-11 3.379825970093081E-9 -3.345978635557743E-9 -1.718961692387919E-10
peri 9.691099306029542E-13 -2.927744916919192E-12 3.771058593074242E-9 -3.345978635557743E-9 4.104166749379388E-9 1.701687717618919E-10
i -1.289851320176248E-14 4.616429945452799E-14 -1.394651843316644E-13 -1.718961692387919E-10 1.701687717618919E-10 8.315523641766927E-11

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

[ hide close-approach data ]
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 19:30 00:07 Jupiter 1.92780031028706 1.9277950275592 1.92780559303913 3.75765049231185 3.6388448916687 2430038.312218154 6.64067508762093 445.984470489199 51.5031716366233 -59.4283895419858 1011293.97360288 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 04:31:05 2020-Feb-26 04:31
1951-Mar-10 05:42 00:06 Jupiter 1.45657534261666 1.45657426826076 1.45657641699119 1.69069176633318 1.30207747764529 2433715.737186286 5.96390201016509 785.89086877932 391.483484567951 -65.6900547449939 396258.113609356 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 04:31:05 2020-Feb-26 04:31
1961-Feb-06 17:02 00:05 Jupiter 1.82487627118274 1.8248731541885 1.82487938816567 2.0361636363505 1.79378247427029 2437337.209712181 5.00943329838903 192.162514527469 43.9577920229336 56.8948752447033 402328.689983346 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 04:31:05 2020-Feb-26 04:31
2023-Jan-02 16:56 < 00:01 Jupiter 1.52326583982612 1.52326475954719 1.52326692012861 2.33326761148171 2.08135146017769 2459947.205737692 0.800909516902447 493.651040358661 38.0794106369066 -83.9724797947272 815581.771580214 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 04:31:05 2020-Feb-26 04:31
2032-Dec-24 19:30 00:02 Jupiter 1.64333561202038 1.64333423785534 1.64333698621345 1.19266641506576 0.625775967443039 2463591.312540782 2.02942207811966 1571.89842433925 740.460918531302 34.1492130230849 975081.854535455 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 04:31:05 2020-Feb-26 04:31
2094-Oct-31 21:03 00:07 Jupiter 1.69730049398559 1.69729578117481 1.69730520690144 2.95388485613463 2.77981182220669 2486182.376830100 7.02314833576939 751.836999866341 29.4560648066275 -76.5854155344728 825557.340316591 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 04:31:05 2020-Feb-26 04:31
2104-Nov-18 06:44 00:09 Jupiter 1.4969986659311 1.49699578788702 1.49700154442185 1.36471958252169 0.854887081916503 2489851.780576179 8.61888857295415 2453.67061581779 889.754779439264 -41.7352152512979 444991.153951477 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 04:31:05 2020-Feb-26 04:31
2166-Aug-20 23:16 00:13 Jupiter 1.91866445438344 1.91865466786069 1.91867424100783 3.57568658151359 3.4500152529964 2512407.469368594 12.9028838431263 866.657542116676 44.4708226714738 -60.7926340048122 1072397.45969317 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 04:31:05 2020-Feb-26 04:31
2176-Sep-17 22:29 00:14 Jupiter 1.43392480266787 1.43392374141225 1.43392586395447 1.9244051910956 1.58805886763631 2516088.436570815 14.3008948742991 744.82835926037 446.257563420944 -77.0256477078066 246129.943510497 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 04:31:05 2020-Feb-26 04:31
2186-Aug-22 11:10 00:17 Jupiter 1.85588329892159 1.85587295478715 1.85589364298682 2.02936324273011 1.79039604455478 2519713.965399637 16.7296419299336 623.421563420941 22.7360028130852 67.7754529792593 500464.93235583 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 04:31:05 2020-Feb-26 04:31

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