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JPL Small-Body Database Browser
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20384 (1998 KW51)
Classification: Main-belt Asteroid          SPK-ID: 2020384
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1667694511177214 4.8269e-08  
a 2.576337320915207 1.3914e-08 au
q 2.146682960012078 1.221e-07 au
i 13.70958057437899 5.5271e-06 deg
node 123.0429455746126 2.2997e-05 deg
peri 267.2683429282986 2.8999e-05 deg
M 338.983283827043 2.0172e-05 deg
tp 2459088.678939713991
(2020-Aug-27.17893971)
8.4921e-05 TDB
period 1510.436646514904
4.14
1.2236e-05
3.35e-08
d
yr
n .2383416747936059 1.9308e-09 deg/d
Q 3.005991681818337 1.6234e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1337  
   data-arc span      15059 days (41.23 yr)  
   first obs. used      1978-07-09  
   last obs. used      2019-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52579  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:05:55  

Additional Information
 Earth MOID = 1.20295 au 
 Jupiter MOID = 2.55172 au 
 T_jup = 3.368 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455913.5 (2011-Dec-18.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1689344486053723 4.8751e-08  
q 2.140767750393627 1.2371e-07 au
tp 2456067.093739346792
(2012-May-19.59373935)
7.6171e-05 TDB
node 123.2194684920382 2.3066e-05 deg
peri 267.1334580224207 2.8788e-05 deg
i 13.69054432906742 5.5206e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1337  
   data-arc span      15059 days (41.23 yr)  
   first obs. used      1978-07-09  
   last obs. used      2019-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52579  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:05:55  

Additional Information
 Jupiter MOID = 2.55172 au 
 T_jup = 3.368 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.376657586786674E-15 -6.006626886634798E-15 3.436316760800806E-13 -5.3914309101974E-15 4.272872283413077E-14 4.542278257106089E-15
q -6.006626886634798E-15 1.530520917242318E-14 -7.779447333444198E-13 1.476849863298878E-14 -9.358346695952028E-14 -1.143648072444208E-14
tp 3.436316760800806E-13 -7.779447333444198E-13 5.802014761635021E-9 -3.588965717052216E-11 1.346206365995714E-9 -3.991934100940918E-12
node -5.3914309101974E-15 1.476849863298878E-14 -3.588965717052216E-11 5.32032135044228E-10 -5.23867714497199E-10 3.579781644134923E-12
peri 4.272872283413077E-14 -9.358346695952028E-14 1.346206365995714E-9 -5.23867714497199E-10 8.287504862793241E-10 -4.541225848377409E-12
i 4.542278257106089E-15 -1.143648072444208E-14 -3.991934100940918E-12 3.579781644134923E-12 -4.541225848377409E-12 3.047672332111017E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.4   n/a MPO449101  
diameter diameter 5.185 km 0.171 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.345   0.089 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20384 (1998 KW51)          Discovered 1998-May-23 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 KW51 = 1978 NV7 = 1999 SE5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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