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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1762949908045108 3.5106e-08  
a 3.184608438331806 1.7518e-08 au
q 2.623177922980132 1.1004e-07 au
i 9.756596087578918 3.8729e-06 deg
node 105.9313014966063 2.4599e-05 deg
peri 324.810386759281 2.7444e-05 deg
M 102.1837010496352 1.1934e-05 deg
tp 2458611.301521088173
(2019-May-07.80152109)
6.7726e-05 TDB
period 2075.785572742425
5.68
1.7127e-05
4.689e-08
d
yr
n .1734283178027805 1.431e-09 deg/d
Q 3.746038953683479 2.0606e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1124  
   data-arc span      10168 days (27.84 yr)  
   first obs. used      1993-05-18  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50103  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 06:40:13  

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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