Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
390187 (2012 WH18)
Classification: Main-belt Asteroid          SPK-ID: 2390187
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]
Orbit Diagram
[ switch to new HTML5 viewer ]

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 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 
[ 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

[ 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-27 04:07 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin