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100649 (1997 WF4)
Classification: Main-belt Asteroid          SPK-ID: 2100649
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08263097142190944 3.8726e-08  
a 2.647893240604901 1.8566e-08 au
q 2.42909524991221 1.0194e-07 au
i 2.12990959509274 5.1795e-06 deg
node 221.5904158266044 0.00014865 deg
peri 218.1039960598299 0.00015498 deg
M 97.23911195927604 4.3938e-05 deg
tp 2458775.403414570758
(2019-Oct-18.90341457)
0.00019051 TDB
period 1573.798522744823
4.31
1.6552e-05
4.532e-08
d
yr
n .2287459257314164 2.4058e-09 deg/d
Q 2.866691231297592 2.01e-08 au
  Orbit Determination Parameters
   # obs. used (total)      274  
   data-arc span      8109 days (22.20 yr)  
   first obs. used      1997-10-23  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5586  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 14:57:57  

Additional Information
 Earth MOID = 1.44468 au 
 Jupiter MOID = 2.30915 au 
 T_jup = 3.386 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456770.5 (2014-Apr-23.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0807223112422986 3.8687e-08  
q 2.434861038008269 1.0153e-07 au
tp 2457201.916287673088
(2015-Jun-28.41628767)
0.00019093 TDB
node 221.6999186540998 0.00014908 deg
peri 218.2384055998893 0.00015572 deg
i 2.12548705474354 5.1742e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      274  
   data-arc span      8109 days (22.20 yr)  
   first obs. used      1997-10-23  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5586  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 14:57:57  

Additional Information
 Jupiter MOID = 2.30915 au 
 T_jup = 3.386 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.496714456648369E-15 -3.873349573124988E-15 2.989534258891802E-13 2.420573066904405E-15 6.021462219398452E-14 -5.526910473298315E-16
q -3.873349573124988E-15 1.03079270591739E-14 3.837837935442561E-14 2.063789877501785E-17 1.325797208878824E-14 1.420568670380528E-15
tp 2.989534258891802E-13 3.837837935442561E-14 3.645517269971033E-8 9.472460110520967E-11 8.62692577861429E-9 -5.81840876344678E-12
node 2.420573066904405E-15 2.063789877501785E-17 9.472460110520967E-11 2.222498733785378E-8 -2.218699179521522E-8 -2.476258985946367E-10
peri 6.021462219398452E-14 1.325797208878824E-14 8.62692577861429E-9 -2.218699179521522E-8 2.425022971266033E-8 2.460613479900924E-10
i -5.526910473298315E-16 1.420568670380528E-15 -5.81840876344678E-12 -2.476258985946367E-10 2.460613479900924E-10 2.677228599745069E-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 16.6   n/a MPO412741  

100649 (1997 WF4)          Discovered 1997-Nov-20 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1997 WF4 = 2003 BZ32 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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