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90976 (1997 WH38)
Classification: Main-belt Asteroid          SPK-ID: 2090976
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 .1640914388922819 4.5594e-08  
a 2.289313021510417 1.0157e-08 au
q 1.913656353735936 1.0534e-07 au
i 4.898927215966642 4.3307e-06 deg
node 246.8888390743735 6.3005e-05 deg
peri 150.5738168891708 6.469e-05 deg
M 198.1912294430905 1.7044e-05 deg
tp 2459569.164021493294
(2021-Dec-20.66402149)
6.2134e-05 TDB
period 1265.191293605339
3.46
8.4203e-06
2.305e-08
d
yr
n .2845419517345316 1.8937e-09 deg/d
Q 2.664969689284899 1.1824e-08 au
  Orbit Determination Parameters
   # obs. used (total)      627  
   data-arc span      8189 days (22.42 yr)  
   first obs. used      1997-11-26  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55163  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:36:54  

Additional Information
 Earth MOID = .923062 au 
 Jupiter MOID = 2.74565 au 
 T_jup = 3.577 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457111.5 (2015-Mar-30.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1629349484279399 4.5438e-08  
q 1.916605469387807 1.0484e-07 au
tp 2457038.054319866544
(2015-Jan-15.55431987)
5.4279e-05 TDB
node 246.9944125182539 6.3073e-05 deg
peri 150.4387077208123 6.4791e-05 deg
i 4.895349308374719 4.3261e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      627  
   data-arc span      8189 days (22.42 yr)  
   first obs. used      1997-11-26  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55163  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:36:54  

Additional Information
 Jupiter MOID = 2.74565 au 
 T_jup = 3.577 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.064639256778261E-15 -4.74779178291474E-15 -9.628999383947453E-13 3.218656599152407E-14 -2.950040723510932E-13 -2.193580577661381E-15
q -4.74779178291474E-15 1.099044305757672E-14 2.379841706386895E-12 -7.271929981838496E-14 7.212100649928593E-13 5.097057077403431E-15
tp -9.628999383947453E-13 2.379841706386895E-12 2.946248953818588E-9 -5.983447321797064E-12 8.385387819589583E-10 2.436787577451502E-12
node 3.218656599152407E-14 -7.271929981838496E-14 -5.983447321797064E-12 3.978176558688792E-9 -3.964914596230226E-9 -9.159530730435677E-11
peri -2.950040723510932E-13 7.212100649928593E-13 8.385387819589583E-10 -3.964914596230226E-9 4.197917434262883E-9 9.197699190417628E-11
i -2.193580577661381E-15 5.097057077403431E-15 2.436787577451502E-12 -9.159530730435677E-11 9.197699190417628E-11 1.87153606370705E-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 16.0   n/a MPO309817  

90976 (1997 WH38)          Discovered 1997-Nov-29 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1997 WH38 = 2000 QA227 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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