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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09738253205616702 9.4451e-08  
a 2.526715460537065 1.6091e-08 au
q 2.280657511204502 2.4189e-07 au
i 3.751388909940492 4.2566e-06 deg
node 244.9474126126031 8.9377e-05 deg
peri 328.7878175661103 0.00010225 deg
M 98.52107523403978 5.4678e-05 deg
tp 2458799.024011873189
(2019-Nov-11.52401187)		 0.00022179 TDB
period 1467.009524432345
4.02		 1.4013e-05
3.837e-08		 d
yr
n .2453971797758443 2.3441e-09 deg/d
Q 2.772773409869629 1.7658e-08 au
   Orbit Determination Parameters
   # obs. used (total)      619  
   data-arc span      9239 days (25.30 yr)  
   first obs. used      1993-11-17  
   last obs. used      2019-03-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55519  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:30:56  

Additional Information
 Earth MOID = 1.27385 au 
 Jupiter MOID = 2.20179 au 
 T_jup = 3.443 
[ 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 MPO426629  

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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1976-Jun-23 23:47 < 00:01 Iris 0.0401434837305199 0.0401344258116755 0.0401525418137076 6.51458512582545 6.51458510384325 2442953.491105298 0.974575539075378 469.770188289652 63.737228767683 16.1396117276972 28919.9351018223 T 17 CATAB v2.0f-lin.ifort 2021-Apr-13 15:30:58 2021-Apr-13 15:30

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