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JPL Small-Body Database Browser
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201770 (2003 WL81)
Classification: Main-belt Asteroid          SPK-ID: 2201770
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04958318261831579 6.0745e-08  
a 2.992058061168374 4.0942e-08 au
q 2.843702299916858 1.7857e-07 au
i 9.132052699603843 6.5653e-06 deg
node 267.3129655153407 4.1471e-05 deg
peri 239.3102675409655 8.5511e-05 deg
M 274.3841612278599 7.0935e-05 deg
tp 2459050.078016679650
(2020-Jul-19.57801668)
0.0003716 TDB
period 1890.398883265281
5.18
3.8801e-05
1.062e-07
d
yr
n .190435999082994 3.9087e-09 deg/d
Q 3.140413822419889 4.2972e-08 au
  Orbit Determination Parameters
   # obs. used (total)      330  
   data-arc span      6295 days (17.23 yr)  
   first obs. used      2002-09-12  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59622  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 14:37:18  

Additional Information
 Earth MOID = 1.87023 au 
 Jupiter MOID = 1.97687 au 
 T_jup = 3.235 
[ 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 15.1   n/a MPO413037  
diameter diameter 3.498 km 0.660 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.158   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

201770 (2003 WL81)          Discovered 2003-Nov-20 by Spacewatch at Kitt Peak
Reference: 20081212/Numbers.arcLast Updated: 2008-12-12

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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