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20733 (1999 XE168)
Classification: Main-belt Asteroid          SPK-ID: 2020733
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1242186353731448 1.8699e-08  
a 3.176418091998277 2.2028e-08 au
q 2.781847771235683 6.4203e-08 au
i 13.56159533005403 8.7971e-07 deg
node 57.86386484596779 3.3729e-06 deg
peri 146.8707770799207 9.4779e-06 deg
M 135.9268233924158 1.2118e-05 deg
tp 2458419.757924000926
(2018-Oct-28.25792400)
6.5586e-05 TDB
period 2067.782799192151
5.66
2.151e-05
5.889e-08
d
yr
n .1740995234802447 1.811e-09 deg/d
Q 3.570988412760872 2.4764e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1938  
   data-arc span      17900 days (49.01 yr)  
   first obs. used      1972-01-14  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4173  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:29:19  

Additional Information
 Earth MOID = 1.78579 au 
 Jupiter MOID = 1.43931 au 
 T_jup = 3.145 
[ 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 12.69   n/a E2021B10  
rotation period rot_per 3.871 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

20733 (1999 XE168)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 XE168 = 1972 AO = 1996 JV1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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