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15985 (1998 WU20)
Classification: Main-belt Asteroid          SPK-ID: 2015985
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05007265255540631 3.4954e-08  
a 2.22188049981385 6.4043e-09 au
q 2.110625049527039 7.8085e-08 au
i 7.544007461911457 3.8714e-06 deg
node 216.9686248296562 2.3453e-05 deg
peri 9.228530431624785 4.1077e-05 deg
M 9.72194527177788 3.2544e-05 deg
tp 2458967.831428522285
(2020-Apr-28.33142852)
0.0001094 TDB
period 1209.704992489295
3.31
5.2303e-06
1.432e-08
d
yr
n .2975932167223701 1.2867e-09 deg/d
Q 2.333135950100661 6.725e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2084  
   data-arc span      12116 days (33.17 yr)  
   first obs. used      1987-06-02  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47526  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:03:08  

Additional Information
 Earth MOID = 1.10165 au 
 Jupiter MOID = 2.63933 au 
 T_jup = 3.636 
[ 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 14.0   n/a MPO324456  
diameter diameter 6.340 km 0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.110   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15985 (1998 WU20)          Discovered 1998-Nov-18 by LINEAR at Socorro
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 WU20 = 1987 LA = 1988 VQ5 = 1991 RB14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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