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100668 (1997 WH44)
Classification: Main-belt Asteroid          SPK-ID: 2100668
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1802991848387913 3.3356e-08  
a 2.3265291822209 9.3465e-09 au
q 1.907057867162812 7.6063e-08 au
i 5.156587013535856 3.4246e-06 deg
node 83.92878456547717 4.4574e-05 deg
peri 34.24353831421915 4.6107e-05 deg
M 90.08800505844248 1.1698e-05 deg
tp 2458676.141224296062
(2019-Jul-11.64122430)
4.1303e-05 TDB
period 1296.167666024646
3.55
7.8108e-06
2.138e-08
d
yr
n .2777418457784264 1.6737e-09 deg/d
Q 2.746000497278988 1.1032e-08 au
  Orbit Determination Parameters
   # obs. used (total)      671  
   data-arc span      8264 days (22.63 yr)  
   first obs. used      1997-11-29  
   last obs. used      2020-07-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55818  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:04:54  

Additional Information
 Earth MOID = .92585 au 
 Jupiter MOID = 2.35049 au 
 T_jup = 3.547 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457494.5 (2016-Apr-16.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1805373178645789 3.3404e-08  
q 1.906981495783216 7.6266e-08 au
tp 2457380.790539968321
(2015-Dec-24.29053997)
3.8798e-05 TDB
node 83.95210411861356 4.4588e-05 deg
peri 34.48496129377003 4.6112e-05 deg
i 5.155762229309026 3.4238e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      671  
   data-arc span      8264 days (22.63 yr)  
   first obs. used      1997-11-29  
   last obs. used      2020-07-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55818  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:04:54  

Additional Information
 Jupiter MOID = 2.35049 au 
 T_jup = 3.547 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.115858551635258E-15 -2.535517932077213E-15 2.299335945094918E-13 2.184843057337311E-14 2.542191259969823E-14 -2.000061830774206E-15
q -2.535517932077213E-15 5.816544420983065E-15 -4.747479216936408E-13 -5.029601021803464E-14 -4.220868728040751E-14 4.561397193895723E-15
tp 2.299335945094918E-13 -4.747479216936408E-13 1.505303022091736E-9 4.95928141188076E-12 4.688905772128756E-10 -1.060309204235505E-12
node 2.184843057337311E-14 -5.029601021803464E-14 4.95928141188076E-12 1.988084455180646E-9 -1.978693647818169E-9 1.913983216972442E-13
peri 2.542191259969823E-14 -4.220868728040751E-14 4.688905772128756E-10 -1.978693647818169E-9 2.126274354254178E-9 -4.831733474698462E-13
i -2.000061830774206E-15 4.561397193895723E-15 -1.060309204235505E-12 1.913983216972442E-13 -4.831733474698462E-13 1.172243733284015E-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 16.4   n/a MPO453461  

100668 (1997 WH44)          Discovered 1997-Nov-29 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1997 WH44 = 2002 EX105 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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