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101474 (1998 WQ21)
Classification: Main-belt Asteroid          SPK-ID: 2101474
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07890563306630007 5.9756e-08  
a 2.855460772121631 2.1175e-08 au
q 2.630148832201388 1.7458e-07 au
i 7.082232831460721 5.7539e-06 deg
node 46.13898472529611 3.7231e-05 deg
peri 341.2104102010409 4.5872e-05 deg
M 188.9460206612475 2.8584e-05 deg
tp 2459837.920147584476
(2022-Sep-15.42014758)
0.00014425 TDB
period 1762.433439407934
4.83
1.9605e-05
5.368e-08
d
yr
n .2042630331168349 2.2721e-09 deg/d
Q 3.080772712041875 2.2846e-08 au
  Orbit Determination Parameters
   # obs. used (total)      618  
   data-arc span      7882 days (21.58 yr)  
   first obs. used      1998-11-18  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60081  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:00:24  

Additional Information
 Earth MOID = 1.63623 au 
 Jupiter MOID = 2.32041 au 
 T_jup = 3.288 
[ 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 15.2   n/a MPO436474  

101474 (1998 WQ21)          Discovered 1998-Nov-18 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 WQ21 = 2003 WN73 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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