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100657 (1997 WT18)
Classification: Main-belt Asteroid          SPK-ID: 2100657
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1297723505097686 4.9654e-08  
a 2.578872341203116 1.3311e-08 au
q 2.244206015820557 1.2465e-07 au
i 9.089183629427316 5.1387e-06 deg
node 67.75713981852259 3.2056e-05 deg
peri 26.00750112578901 3.7503e-05 deg
M 127.9698972908117 1.9921e-05 deg
tp 2458462.789503927928
(2018-Dec-10.28950393)
8.2409e-05 TDB
period 1512.666515204313
4.14
1.1711e-05
3.206e-08
d
yr
n .2379903279285424 1.8425e-09 deg/d
Q 2.913538666585674 1.5038e-08 au
  Orbit Determination Parameters
   # obs. used (total)      451  
   data-arc span      8270 days (22.64 yr)  
   first obs. used      1997-11-23  
   last obs. used      2020-07-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57455  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:04:58  

Additional Information
 Earth MOID = 1.26444 au 
 Jupiter MOID = 2.29439 au 
 T_jup = 3.396 
[ 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 MPO474881  

100657 (1997 WT18)          Discovered 1997-Nov-23 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1997 WT18 = 2001 TZ152 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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