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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1293287998998268 4.9597e-08  
a 2.579881781854965 1.3172e-08 au
q 2.246228767124235 1.2455e-07 au
i 9.08668725990182 5.1269e-06 deg
node 67.75453484291774 3.1946e-05 deg
peri 26.05573855432631 3.7399e-05 deg
M 175.5184434931708 1.9963e-05 deg
tp 2458462.564516940967
(2018-Dec-10.06451694)
8.2083e-05 TDB
period 1513.554750225369
4.14
1.1592e-05
3.174e-08
d
yr
n .2378506624530072 1.8216e-09 deg/d
Q 2.913534796585694 1.4876e-08 au
  Orbit Determination Parameters
   # obs. used (total)      459  
   data-arc span      8270 days (22.64 yr)  
   first obs. used      1997-11-23  
   last obs. used      2020-07-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57208  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:33:11  

Additional Information
 Earth MOID = 1.26619 au 
 Jupiter MOID = 2.29397 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 15.84   n/a E2021B55  

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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