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18364 (1990 WF4)
Classification: Main-belt Asteroid          SPK-ID: 2018364
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1429456624255402 3.5635e-08  
a 3.14750402180103 1.94e-08 au
q 2.69758197441763 1.1051e-07 au
i 11.9836576486249 4.3921e-06 deg
node 95.42562026152804 2.1833e-05 deg
peri 46.67628285103239 2.7917e-05 deg
M 116.3197789736695 1.6885e-05 deg
tp 2458737.479483836565
(2019-Sep-10.97948384)
9.5313e-05 TDB
period 2039.613451058401
5.58
1.8857e-05
5.163e-08
d
yr
n .1765040330623374 1.6319e-09 deg/d
Q 3.59742606918443 2.2173e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1512  
   data-arc span      11184 days (30.62 yr)  
   first obs. used      1990-11-16  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48773  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:32:45  

Additional Information
 Earth MOID = 1.72819 au 
 Jupiter MOID = 1.55513 au 
 T_jup = 3.159 
[ 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 13.66   n/a MPO636341  
diameter diameter 13.657 km 0.294 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.034   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18364 (1990 WF4)          Discovered 1990-Nov-16 by Elst, E. W. at La Silla
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ 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
1928-Aug-27 00:31 00:03 Jupiter 1.85657161420283 1.85657039314868 1.85657283525718 2.85861907418635 2.69429847215528 2425485.521754457 2.95583649485944 135.123800353077 21.3854528331794 89.4513612892676 888808.168770461 T 32 CATAB v2.0g-lin.ifort 2021-Aug-25 14:32:53 2021-Aug-25 14:32
1938-Dec-09 12:55 00:03 Jupiter 1.59592090092931 1.59592011732624 1.59592168453756 1.76984119445804 1.43904604768501 2429242.038172875 2.61622010385437 232.903640200213 77.895939038365 39.4839296049037 1238363.43615775 T 32 CATAB v2.0g-lin.ifort 2021-Aug-25 14:32:53 2021-Aug-25 14:32
1949-Jun-03 17:28 00:02 Jupiter 1.67569131735615 1.67569049188501 1.67569214282899 3.11956099013781 2.95308446475675 2433071.227892997 1.86156960572286 145.305940870826 26.334476615434 -82.4824910456353 2335269.52431171 T 32 CATAB v2.0g-lin.ifort 2021-Aug-25 14:32:53 2021-Aug-25 14:32
2023-Nov-24 16:40 < 00:01 Jupiter 1.90144907858088 1.90144854399437 1.90144961316738 3.48451265482979 3.35423691491193 2460273.194724779 0.377674436624382 91.8715514873161 21.1708394159149 -87.0333756522497 2424896.23295745 T 32 CATAB v2.0g-lin.ifort 2021-Aug-25 14:32:53 2021-Aug-25 14:32
2034-Mar-18 17:07 < 00:01 Jupiter 1.63069576020653 1.63069517543341 1.63069634498112 1.36223824501666 0.90379479992978 2464040.212995314 0.838022597495721 290.053602618376 142.817841076832 24.824509612699 1699682.94105089 T 32 CATAB v2.0g-lin.ifort 2021-Aug-25 14:32:53 2021-Aug-25 14:32
2044-Aug-14 06:24 00:01 Jupiter 1.64081819141312 1.64081751766194 1.64081886516431 2.85272351724058 2.66563168216868 2467841.766667404 1.07093300712007 94.8051471624623 24.5327549373832 -88.4460698756982 2027151.55696069 T 32 CATAB v2.0g-lin.ifort 2021-Aug-25 14:32:53 2021-Aug-25 14:32
2119-Feb-16 00:41 00:03 Jupiter 1.94383679036729 1.94383509140821 1.94383848932903 4.00780983663177 3.89756900941409 2495054.528785564 3.26929141011023 162.101026562418 33.4436507595439 -68.0554303411581 1262350.71030942 T 32 CATAB v2.0g-lin.ifort 2021-Aug-25 14:32:53 2021-Aug-25 14:32
2129-Jul-05 01:26 00:04 Jupiter 1.65921478393942 1.6592136275601 1.65921594036004 1.39422603420588 0.96066343404319 2498846.559674795 4.38521547414473 1032.80881978706 184.738930366886 -39.8444690935162 1182273.54531683 T 32 CATAB v2.0g-lin.ifort 2021-Aug-25 14:32:53 2021-Aug-25 14:32
2139-Nov-06 14:37 00:04 Jupiter 1.6074167308598 1.60741563389057 1.60741782783999 2.46040397294268 2.2359997419476 2502623.108862598 4.15078320115316 288.374296322527 24.1172288777973 84.7398109776837 1599399.09241179 T 32 CATAB v2.0g-lin.ifort 2021-Aug-25 14:32:53 2021-Aug-25 14:32
2150-May-21 09:42 00:04 Jupiter 1.94417105170437 1.94416802764519 1.9441740757652 3.86830114634942 3.75398562751865 2506471.904133844 4.2377034831527 183.41641014355 54.6944483008202 -44.2277144584863 1498010.85351781 T 32 CATAB v2.0g-lin.ifort 2021-Aug-25 14:32:53 2021-Aug-25 14:32

Alternate Designations
 1990 WF4 = 1998 HU120 = 1999 NQ17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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