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100172 (1993 WL)
Classification: Main-belt Asteroid          SPK-ID: 2100172
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09686235532447569 9.4501e-08  
a 2.526775949146777 1.5854e-08 au
q 2.282026479335182 2.4051e-07 au
i 3.753393447643764 4.3568e-06 deg
node 244.9934759953726 9.0176e-05 deg
peri 328.8355090189393 0.00010301 deg
M 49.4091697261866 5.4739e-05 deg
tp 2458799.149095979376
(2019-Nov-11.64909598)
0.0002227 TDB
period 1467.062204224966
4.02
1.3807e-05
3.78e-08
d
yr
n .2453883679664315 2.3095e-09 deg/d
Q 2.771525418958371 1.739e-08 au
  Orbit Determination Parameters
   # obs. used (total)      609  
   data-arc span      9239 days (25.30 yr)  
   first obs. used      1993-11-17  
   last obs. used      2019-03-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55721  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:01:47  

Additional Information
 Earth MOID = 1.27623 au 
 Jupiter MOID = 2.20423 au 
 T_jup = 3.443 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456741.5 (2014-Mar-25.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09760400558881063 9.4197e-08  
q 2.278751208845541 2.4044e-07 au
tp 2457330.847787338482
(2015-Nov-04.34778734)
0.00021707 TDB
node 245.0975814915179 9.0074e-05 deg
peri 328.3746197465948 0.00010261 deg
i 3.756192724010019 4.3602e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      609  
   data-arc span      9239 days (25.30 yr)  
   first obs. used      1993-11-17  
   last obs. used      2019-03-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55721  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:01:47  

Additional Information
 Jupiter MOID = 2.20423 au 
 T_jup = 3.443 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.873075868664579E-15 -2.260814122406978E-14 -1.650715947346654E-11 2.568781765331306E-13 -3.613826251688E-12 -1.238731910265172E-14
q -2.260814122406978E-14 5.781159105826627E-14 4.22826893956356E-11 -6.550976669276437E-13 9.243604159613028E-12 3.193341840759636E-14
tp -1.650715947346654E-11 4.22826893956356E-11 4.712148692565749E-8 -5.748113030099874E-10 1.07189536340642E-8 3.531108609461923E-11
node 2.568781765331306E-13 -6.550976669276437E-13 -5.748113030099874E-10 8.113398843930862E-9 -8.215907937476018E-9 1.879336568742081E-11
peri -3.613826251688E-12 9.243604159613028E-12 1.07189536340642E-8 -8.215907937476018E-9 1.052902328579613E-8 -1.115447378522505E-11
i -1.238731910265172E-14 3.193341840759636E-14 3.531108609461923E-11 1.879336568742081E-11 -1.115447378522505E-11 1.901136135526794E-11

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 MPO426629  

100172 (1993 WL)          Discovered 1993-Nov-17 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1993 WL = 1999 DL9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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