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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1638151260274518 4.4091e-08  
a 2.290087455107901 9.966e-09 au
q 1.914936490035514 1.0213e-07 au
i 4.897544934833808 4.2969e-06 deg
node 246.8849755100286 5.2996e-05 deg
peri 150.4818814191111 5.4626e-05 deg
M 255.1845589891011 1.6409e-05 deg
tp 2459569.052442440459
(2021-Dec-20.55244244)
5.9307e-05 TDB
period 1265.833335231295
3.47
8.263e-06
2.262e-08
d
yr
n .2843976295933305 1.8565e-09 deg/d
Q 2.665238420180289 1.1599e-08 au
  Orbit Determination Parameters
   # obs. used (total)      688  
   data-arc span      8267 days (22.63 yr)  
   first obs. used      1997-11-26  
   last obs. used      2020-07-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53881  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:42:51  

Additional Information
 Earth MOID = .923284 au 
 Jupiter MOID = 2.74655 au 
 T_jup = 3.576 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457427.5 (2016-Feb-09.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1631224697237891 4.3918e-08  
q 1.917041054413629 1.0149e-07 au
tp 2457038.484042953951
(2015-Jan-15.98404295)
5.0193e-05 TDB
node 246.9553195427672 5.3045e-05 deg
peri 150.6317909613758 5.4696e-05 deg
i 4.894345970858527 4.2943e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      688  
   data-arc span      8267 days (22.63 yr)  
   first obs. used      1997-11-26  
   last obs. used      2020-07-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53881  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:42:51  

Additional Information
 Jupiter MOID = 2.74655 au 
 T_jup = 3.576 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.92877693608361E-15 -4.442331794299251E-15 -7.317779337898229E-13 2.256980545387359E-14 -2.105130056929654E-13 -1.846910067547325E-15
q -4.442331794299251E-15 1.030097184220991E-14 1.865385233585849E-12 -5.068967440480308E-14 5.337796737180139E-13 4.188510803716977E-15
tp -7.317779337898229E-13 1.865385233585849E-12 2.519302065298533E-9 -2.287333881601601E-12 6.919610278536872E-10 1.752766251255035E-12
node 2.256980545387359E-14 -5.068967440480308E-14 -2.287333881601601E-12 2.813773865388235E-9 -2.803743522678565E-9 -8.097020029236704E-11
peri -2.105130056929654E-13 5.337796737180139E-13 6.919610278536872E-10 -2.803743522678565E-9 2.991626509588037E-9 8.116713804670032E-11
i -1.846910067547325E-15 4.188510803716977E-15 1.752766251255035E-12 -8.097020029236704E-11 8.116713804670032E-11 1.84408324418166E-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 15.94   n/a E2021B10  

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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