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100660 (1997 WL21)
Classification: Main-belt Asteroid          SPK-ID: 2100660
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2272113575273117 4.2541e-08  
a 2.623287085021007 8.3215e-09 au
q 2.02724646524952 1.1151e-07 au
i 2.535014333662253 4.2632e-06 deg
node 153.4470705046635 9.7962e-05 deg
peri 259.4174538418746 9.8455e-05 deg
M 118.4070102455285 8.753e-06 deg
tp 2458490.063087341967
(2019-Jan-06.56308734)
3.7111e-05 TDB
period 1551.912240464929
4.25
7.3843e-06
2.022e-08
d
yr
n .2319718799899082 1.1038e-09 deg/d
Q 3.219327704792494 1.0212e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1241  
   data-arc span      8180 days (22.40 yr)  
   first obs. used      1997-11-30  
   last obs. used      2020-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52137  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 17:54:27  

Additional Information
 Earth MOID = 1.04019 au 
 Jupiter MOID = 2.15922 au 
 T_jup = 3.365 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO325156  

100660 (1997 WL21)          Discovered 1997-Nov-30 by Kobayashi, T. at Oizumi
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1997 WL21 = 2001 RS11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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