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160663 (1999 XK259)
Classification: Main-belt Asteroid          SPK-ID: 2160663
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1404692003717958 4.3962e-08  
a 2.613083445065409 1.2056e-08 au
q 2.246025703032294 1.1877e-07 au
i 12.93653374928808 3.4156e-06 deg
node 140.7577214719518 1.9335e-05 deg
peri 285.4961896860119 2.4302e-05 deg
M 347.8943305893607 1.2696e-05 deg
tp 2459252.381754417366
(2021-Feb-06.88175442)
5.433e-05 TDB
period 1542.866483189835
4.22
1.0678e-05
2.923e-08
d
yr
n .2333319207607062 1.6148e-09 deg/d
Q 2.980141187098524 1.375e-08 au
  Orbit Determination Parameters
   # obs. used (total)      873  
   data-arc span      7786 days (21.32 yr)  
   first obs. used      1999-10-09  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47558  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:02:16  

Additional Information
 Earth MOID = 1.29974 au 
 Jupiter MOID = 2.34599 au 
 T_jup = 3.359 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457517.5 (2016-May-09.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1406663826631498 4.3707e-08  
q 2.246244133344642 1.1795e-07 au
tp 2457703.662675226329
(2016-Nov-11.16267523)
5.7565e-05 TDB
node 140.9454669670428 1.9364e-05 deg
peri 284.2488170015683 2.4312e-05 deg
i 12.92477206510553 3.413e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      873  
   data-arc span      7786 days (21.32 yr)  
   first obs. used      1999-10-09  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47558  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:02:16  

Additional Information
 Jupiter MOID = 2.34599 au 
 T_jup = 3.359 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.910286173451195E-15 -5.137588264287688E-15 2.404304623340407E-13 1.038885464149447E-14 1.150986317981149E-13 -8.202907769842006E-15
q -5.137588264287688E-15 1.391110360969937E-14 -8.487572402524678E-13 -2.692604611054737E-14 -3.641756271357544E-13 2.258980220696117E-14
tp 2.404304623340407E-13 -8.487572402524678E-13 3.313702650537168E-9 5.476182398653344E-12 8.655560382079831E-10 1.913674543473613E-12
node 1.038885464149447E-14 -2.692604611054737E-14 5.476182398653344E-12 3.74971839596915E-10 -3.636038821400146E-10 -1.322907573049013E-12
peri 1.150986317981149E-13 -3.641756271357544E-13 8.655560382079831E-10 -3.636038821400146E-10 5.910656678989668E-10 1.445714326051538E-12
i -8.202907769842006E-15 2.258980220696117E-14 1.913674543473613E-12 -1.322907573049013E-12 1.445714326051538E-12 1.164837772796029E-11

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 15.40   n/a E2021B55  

160663 (1999 XK259)          Discovered 1999-Dec-09 by LONEOS at Anderson Mesa
Reference: 20070828/Numbers.arcLast Updated: 2007-08-30

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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