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190121 (2004 WJ8)
Classification: Main-belt Asteroid          SPK-ID: 2190121
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04981551383986303 7.1943e-08  
a 2.838729555858571 2.1981e-08 au
q 2.69731678438107 2.0061e-07 au
i 1.299395434334911 5.5977e-06 deg
node 128.5690718143402 0.00028025 deg
peri 249.338527289935 0.00028437 deg
M 165.3465317628772 4.8666e-05 deg
tp 2458398.125634725776
(2018-Oct-06.62563473)
0.00023559 TDB
period 1746.966013856077
4.78
2.0291e-05
5.555e-08
d
yr
n .2060715532784592 2.3935e-09 deg/d
Q 2.980142327336072 2.3076e-08 au
  Orbit Determination Parameters
   # obs. used (total)      325  
   data-arc span      9652 days (26.43 yr)  
   first obs. used      1994-10-11  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55735  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:06:18  

Additional Information
 Earth MOID = 1.69736 au 
 Jupiter MOID = 2.2552 au 
 T_jup = 3.308 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.32   n/a E2021B55  

190121 (2004 WJ8)          Discovered 2004-Nov-19 by CSS at Catalina
Reference: 20080819/Numbers.arcLast Updated: 2008-08-25
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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