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JPL Small-Body Database Browser
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201798 (2003 WJ161)
Classification: Main-belt Asteroid          SPK-ID: 2201798
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2242032624763042 1.01e-07  
a 2.753799286766577 2.2816e-08 au
q 2.136388502468591 2.7898e-07 au
i 9.597174953352276 8.0055e-06 deg
node 72.75582603204731 5.1127e-05 deg
peri 119.2776987029605 5.2829e-05 deg
M 34.66874771134671 1.5384e-05 deg
tp 2458439.756838670418
(2018-Nov-17.25683867)
7.011e-05 TDB
period 1669.155706472493
4.57
2.0744e-05
5.679e-08
d
yr
n .2156779014708012 2.6804e-09 deg/d
Q 3.371210071064563 2.7931e-08 au
  Orbit Determination Parameters
   # obs. used (total)      327  
   data-arc span      7915 days (21.67 yr)  
   first obs. used      1996-05-22  
   last obs. used      2018-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .74484  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 08:12:14  

Additional Information
 Earth MOID = 1.15465 au 
 Jupiter MOID = 1.65764 au 
 T_jup = 3.288 
[ 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 15.8   n/a MPO433323  
diameter diameter 3.243 km 0.331 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.056   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

201798 (2003 WJ161)          Discovered 2003-Nov-30 by Spacewatch at Kitt Peak
Reference: 20081212/Numbers.arcLast Updated: 2008-12-12

[ show close-approach data ]
Alternate Designations
 2003 WJ161 = 1996 KB4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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