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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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1667694497036348 4.7974e-08  
a 2.57633732071293 1.3839e-08 au
q 2.146682963486697 1.2146e-07 au
i 13.70958048925747 5.5271e-06 deg
node 123.0429460481619 2.2863e-05 deg
peri 267.2683422826572 2.8898e-05 deg
M 338.98328410166 2.0151e-05 deg
tp 2459088.678938551407
(2020-Aug-27.17893855)
8.4831e-05 TDB
period 1510.43664633702
4.14
1.217e-05
3.332e-08
d
yr
n .2383416748216755 1.9204e-09 deg/d
Q 3.005991677939162 1.6147e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1341  
   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      .52517  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 05:11:45  

Additional Information
 Earth MOID = 1.20295 au 
 Jupiter MOID = 2.55172 au 
 T_jup = 3.368 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455898.5 (2011-Dec-03.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1689209401605485 4.8456e-08  
q 2.140773063203206 1.2305e-07 au
tp 2456067.097367746113
(2012-May-19.59736775)
7.616e-05 TDB
node 123.2196233640465 2.2932e-05 deg
peri 267.1340818884316 2.8686e-05 deg
i 13.69059712272367 5.5206e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1341  
   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      .52517  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 05:11:45  

Additional Information
 Jupiter MOID = 2.55172 au 
 T_jup = 3.368 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.348006604766998E-15 -5.93838489368101E-15 3.364329869055593E-13 -5.050429310471602E-15 3.985999609321594E-14 4.519412361820265E-15
q -5.93838489368101E-15 1.514251005627072E-14 -7.599716237257326E-13 1.391025346174415E-14 -8.657749863760366E-14 -1.136937602760059E-14
tp 3.364329869055593E-13 -7.599716237257326E-13 5.800290830403194E-9 -3.623701713859465E-11 1.345939330195499E-9 -4.00550257681907E-12
node -5.050429310471602E-15 1.391025346174415E-14 -3.623701713859465E-11 5.258827252894535E-10 -5.179772269124213E-10 3.578403312764803E-12
peri 3.985999609321594E-14 -8.657749863760366E-14 1.345939330195499E-9 -5.179772269124213E-10 8.229003169596634E-10 -4.544090390554739E-12
i 4.519412361820265E-15 -1.136937602760059E-14 -4.00550257681907E-12 3.578403312764803E-12 -4.544090390554739E-12 3.047691265769222E-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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