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101473 (1998 WM20)
Classification: Main-belt Asteroid          SPK-ID: 2101473
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .227868500177824 3.9044e-08  
a 2.593089366916797 1.2558e-08 au
q 2.002205982050403 1.0174e-07 au
i 11.30849873764596 4.7394e-06 deg
node 237.7245244492777 2.4339e-05 deg
peri 106.0598815939345 2.7533e-05 deg
M 151.7333599308618 1.5219e-05 deg
tp 2458557.659504171069
(2019-Mar-15.15950417)
6.1359e-05 TDB
period 1525.192473190233
4.18
1.1079e-05
3.033e-08
d
yr
n .2360357832392071 1.7146e-09 deg/d
Q 3.183972751783191 1.5419e-08 au
  Orbit Determination Parameters
   # obs. used (total)      751  
   data-arc span      8161 days (22.34 yr)  
   first obs. used      1998-11-10  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54044  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:36:57  

Additional Information
 Earth MOID = 1.02888 au 
 Jupiter MOID = 2.39824 au 
 T_jup = 3.355 
[ 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 15.06   n/a E2021B55  
diameter diameter 3.081 km 0.251 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.245   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101473 (1998 WM20)          Discovered 1998-Nov-18 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 WM20 = 2002 OU3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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