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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1636737466650842 5.9859e-08  
a 3.116367616646137 4.5481e-08 au
q 2.606300052843925 1.7525e-07 au
i 8.626103434470636 8.8699e-06 deg
node 45.16443753845023 3.9142e-05 deg
peri 102.6892046037157 4.7674e-05 deg
M 63.90354979335394 2.6763e-05 deg
tp 2458643.807536059103
(2019-Jun-09.30753606)
0.00014632 TDB
period 2009.423379983776
5.50
4.3989e-05
1.204e-07
d
yr
n .1791558730658875 3.922e-09 deg/d
Q 3.626435180448349 5.2925e-08 au
  Orbit Determination Parameters
   # obs. used (total)      158  
   data-arc span      4955 days (13.57 yr)  
   first obs. used      2006-11-16  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64708  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 16:43:05  

Additional Information
 Earth MOID = 1.63454 au 
 Jupiter MOID = 1.46066 au 
 T_jup = 3.179 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458051.5 (2017-Oct-25.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1643446674259404 5.9777e-08  
q 2.605542101254469 1.7532e-07 au
tp 2458643.370716487787
(2019-Jun-08.87071649)
0.0001459 TDB
node 45.17128017299239 3.9132e-05 deg
peri 102.5902102561783 4.7613e-05 deg
i 8.626723390371753 8.8705e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      158  
   data-arc span      4955 days (13.57 yr)  
   first obs. used      2006-11-16  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64708  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 16:43:05  

Additional Information
 Jupiter MOID = 1.46066 au 
 T_jup = 3.179 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.573296102118325E-15 -1.026693174155431E-14 3.523091194471258E-12 -3.22122455623669E-15 5.382412996512322E-13 -3.240774328357661E-15
q -1.026693174155431E-14 3.073792397283933E-14 -8.921554814108773E-12 2.759898296783591E-15 -1.395791750773991E-12 1.175016166682107E-14
tp 3.523091194471258E-12 -8.921554814108773E-12 2.128651809815503E-8 -4.933029109182543E-11 3.963991521192213E-9 3.799313202087454E-12
node -3.22122455623669E-15 2.759898296783591E-15 -4.933029109182543E-11 1.531295388884051E-9 -1.522484174546236E-9 -8.973898387465534E-11
peri 5.382412996512322E-13 -1.395791750773991E-12 3.963991521192213E-9 -1.522484174546236E-9 2.267004718435488E-9 8.948298304430743E-11
i -3.240774328357661E-15 1.175016166682107E-14 3.799313202087454E-12 -8.973898387465534E-11 8.948298304430743E-11 7.868608802315503E-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 19:31 00:05 Jupiter 1.92780126978313 1.92779720670597 1.92780533287518 3.75765366566514 3.63884822872614 2430038.313132954 5.04506954927437 350.96499846741 44.7061724238287 -60.5952688847037 1067876.25760933 T 13 CATAB v2.0f-lin.ifort 2020-Nov-12 16:43:05 2020-Nov-12 16:43
1951-Mar-10 05:43 00:05 Jupiter 1.45657531420608 1.45657430560793 1.4565763228053 1.69069079272926 1.30207620475101 2433715.737915544 4.61353506545867 549.796920741964 382.821362774717 -74.6337465122489 417463.793514055 T 13 CATAB v2.0f-lin.ifort 2020-Nov-12 16:43:05 2020-Nov-12 16:43
1961-Feb-06 17:03 00:04 Jupiter 1.82487553591192 1.82487310704077 1.82487796477654 2.03616131427692 1.79377973417356 2437337.210306296 3.97704082694665 149.729079051011 33.2273287540189 61.5473547128137 526816.872853576 T 13 CATAB v2.0f-lin.ifort 2020-Nov-12 16:43:05 2020-Nov-12 16:43
2023-Jan-02 16:56 < 00:01 Jupiter 1.52326574376882 1.52326484332805 1.52326664422041 2.3332651668718 2.08134870283706 2459947.205632944 0.610571619783715 418.072560678 24.2600810567974 -83.2559302446924 988133.472111746 T 13 CATAB v2.0f-lin.ifort 2020-Nov-12 16:43:05 2020-Nov-12 16:43
2032-Dec-24 19:30 00:01 Jupiter 1.6433356315655 1.64333431534778 1.64333694781013 1.1926660536298 0.625775288378267 2463591.312171245 1.46095844037321 1560.609080696 448.246819337005 32.6040628541754 1315877.63705026 T 13 CATAB v2.0f-lin.ifort 2020-Nov-12 16:43:05 2020-Nov-12 16:43
2094-Oct-31 21:01 00:05 Jupiter 1.69729953382121 1.6972960872058 1.69730298048929 2.95388101827906 2.77980764246588 2486182.375906414 5.34081264302301 549.460538013262 28.5862051977354 -76.4281670007157 858540.263776599 T 13 CATAB v2.0f-lin.ifort 2020-Nov-12 16:43:05 2020-Nov-12 16:43
2104-Nov-18 06:42 00:07 Jupiter 1.49699908782261 1.49699652954387 1.49700164648614 1.3647143467681 0.854878910200129 2489851.779347762 6.52771133273798 2022.87535526157 608.837738800669 -53.2051488933497 699792.187086778 T 13 CATAB v2.0f-lin.ifort 2020-Nov-12 16:43:05 2020-Nov-12 16:43
2166-Aug-20 23:13 00:10 Jupiter 1.91866247079829 1.91865503895913 1.91866990269482 3.57568061697072 3.45000893889657 2512407.467661870 9.83573527052761 654.736111960191 38.33885893682 -60.5354783386083 1168631.61193795 T 13 CATAB v2.0f-lin.ifort 2020-Nov-12 16:43:05 2020-Nov-12 16:43
2176-Sep-17 22:26 00:11 Jupiter 1.43392468032887 1.43392388671745 1.43392547395259 1.92439845419875 1.58805067214198 2516088.434621112 10.8298405849844 667.331682166891 259.308364387393 -66.8483007735992 417648.3389192 T 13 CATAB v2.0f-lin.ifort 2020-Nov-12 16:43:05 2020-Nov-12 16:43
2186-Aug-22 11:07 00:13 Jupiter 1.85588516823589 1.8558772985704 1.85589303785886 2.0293735605674 1.79040799628059 2519713.963052444 12.578075758541 473.339792346208 15.962727181841 66.5932656598843 568368.965915297 T 13 CATAB v2.0f-lin.ifort 2020-Nov-12 16:43:05 2020-Nov-12 16:43

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