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57821 (2001 WD44)
Classification: Main-belt Asteroid          SPK-ID: 2057821
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .176217856256 3.6064e-08  
a 3.185350550948485 1.7824e-08 au
q 2.624034905436474 1.1298e-07 au
i 9.756697273988282 4.1402e-06 deg
node 105.9333335645389 2.4692e-05 deg
peri 324.886207920281 2.7806e-05 deg
M 67.43192399773621 1.2279e-05 deg
tp 2458611.546818521071
(2019-May-08.04681852)
7.021e-05 TDB
period 2076.511198718209
5.69
1.7429e-05
4.772e-08
d
yr
n .1733677141843594 1.4551e-09 deg/d
Q 3.746666196460495 2.0965e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1088  
   data-arc span      9843 days (26.95 yr)  
   first obs. used      1993-05-18  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50223  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 11:28:41  

Additional Information
 Earth MOID = 1.64597 au 
 Jupiter MOID = 1.55588 au 
 T_jup = 3.152 
[ show covariance matrix ]

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 14.0   n/a MPO452955  

57821 (2001 WD44)          Discovered 2001-Nov-18 by LINEAR at Socorro
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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