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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2273143801903582 4.2564e-08  
a 2.62290178893296 8.2943e-09 au
q 2.026678494481483 1.1156e-07 au
i 2.535126610449672 4.2634e-06 deg
node 153.4496427841647 9.7951e-05 deg
peri 259.3775311812323 9.8443e-05 deg
M 164.8537936281937 8.8117e-06 deg
tp 2458489.993728539746
(2019-Jan-06.49372854)
3.706e-05 TDB
period 1551.570346646527
4.25
7.3597e-06
2.015e-08
d
yr
n .2320229957849367 1.1006e-09 deg/d
Q 3.219125083384438 1.018e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1242  
   data-arc span      8199 days (22.45 yr)  
   first obs. used      1997-11-30  
   last obs. used      2020-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52149  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:04:57  

Additional Information
 Earth MOID = 1.03881 au 
 Jupiter MOID = 2.16045 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 15.22   n/a E2021B55  

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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