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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1762949948390988 3.6021e-08  
a 3.184608449388398 1.7819e-08 au
q 2.62317791923892 1.1279e-07 au
i 9.756594370795442 4.1322e-06 deg
node 105.931299669942 2.4672e-05 deg
peri 324.8103878896894 2.7785e-05 deg
M 102.1837006498651 1.2337e-05 deg
tp 2458611.301520324832
(2019-May-07.80152032)
7.0154e-05 TDB
period 2075.785583552757
5.68
1.7422e-05
4.77e-08
d
yr
n .1734283168995959 1.4556e-09 deg/d
Q 3.746038979537877 2.0961e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1098  
   data-arc span      9887 days (27.07 yr)  
   first obs. used      1993-05-18  
   last obs. used      2020-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50181  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:53:28  

Additional Information
 Earth MOID = 1.64466 au 
 Jupiter MOID = 1.55734 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 14.07   n/a E2021B10  
rotation period rot_per 3.38634 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

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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