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22011 (1999 XR81)
Classification: Main-belt Asteroid          SPK-ID: 2022011
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1784405908197861 4.1985e-08  
a 3.110874547678968 2.2984e-08 au
q 2.555768255424898 1.3422e-07 au
i 18.52574655131819 4.9796e-06 deg
node 84.96404539756293 1.8804e-05 deg
peri 24.3280280228342 2.5526e-05 deg
M 273.1385425847067 1.7671e-05 deg
tp 2459684.056009039054
(2022-Apr-14.55600904)
0.00010074 TDB
period 2004.112853204438
5.49
2.221e-05
6.081e-08
d
yr
n .1796306028497272 1.9907e-09 deg/d
Q 3.665980839933038 2.7085e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1038  
   data-arc span      11244 days (30.78 yr)  
   first obs. used      1990-04-30  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49818  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:57:38  

Additional Information
 Earth MOID = 1.58252 au 
 Jupiter MOID = 1.59352 au 
 T_jup = 3.115 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456869.5 (2014-Jul-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1730048270624809 4.142e-08  
q 2.579804644119339 1.3184e-07 au
tp 2457669.608943692461
(2016-Oct-08.10894369)
9.9016e-05 TDB
node 85.10865475628177 1.8848e-05 deg
peri 23.34150141689851 2.6204e-05 deg
i 18.47873916385133 4.9711e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1038  
   data-arc span      11244 days (30.78 yr)  
   first obs. used      1990-04-30  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49818  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:57:38  

Additional Information
 Jupiter MOID = 1.59352 au 
 T_jup = 3.115 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.715605645960023E-15 -5.402261065573251E-15 4.022799640515444E-13 5.288450549879827E-15 7.710733853872322E-14 -2.683356918772398E-15
q -5.402261065573251E-15 1.738168298510157E-14 -8.302637360185084E-13 -3.228333336451222E-14 -1.818535760351681E-13 1.343698569956864E-14
tp 4.022799640515444E-13 -8.302637360185084E-13 9.804178116925687E-9 3.04897023935381E-13 1.852633587172484E-9 3.134076409682294E-12
node 5.288450549879827E-15 -3.228333336451222E-14 3.04897023935381E-13 3.552461556930885E-10 -3.361986062713967E-10 -8.86181072983547E-12
peri 7.710733853872322E-14 -1.818535760351681E-13 1.852633587172484E-9 -3.361986062713967E-10 6.866272860300448E-10 8.790932886903104E-12
i -2.683356918772398E-15 1.343698569956864E-14 3.134076409682294E-12 -8.86181072983547E-12 8.790932886903104E-12 2.471207467788919E-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 13.69   n/a E2021B10  

22011 (1999 XR81)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XR81 = 1990 HL3 = 1996 LZ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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